Contents Polyhedron

(1)

by the formation of one mononuclear mixed-ligand dioxidomolybdenum complex [MoO2L(Q)] {where Q =c-picoline (1a)}. All these compounds have been characterized by elemental analyses, IR, UV–Vis and¹H NMR spectroscopy, and structural studies by X-ray crystallography. The catalytic activity of these complexes is also reported and discussed.

O

OH

O O O

CH3CH3

OCH3

O O

O Catalyst

H2O2 / MeOH

OH

Catalyst KBr/H2O2/HClO4 O

OH O

OH Br

Br Br

Br

Samir Alghool and Carla Slebodnick Polyhedron 67 (2014) 11

Supramolecular structures of mononuclear and dinuclear dioxomolybdenum(VI) complexes via hydrogen bonds and p–p stacking, thermal studies and electrochemical measurements

Packing diagram of complex (1) aroundb axis. Hydrogen atoms are omitted for clarity.

Merry Mitra, Ashis Kumar Maji, Barindra Kumar Ghosh, Pallepogu Raghavaiah, Joan Ribas and Rajarshi Ghosh Polyhedron 67 (2014) 19

Catecholase activity of a structurally characterized dinuclear iron(III) complex [Fe^III2(L)2] [H3L =N,N¢-bis(3-methoxysalicylaldimine)-1,3- diaminopropan-2-ol]

A dinuclear Fe(III) complex, [Fe^III2(L)2] (1) [H3L = N,N¢-bis(3-methoxysalicylaldimine)-1,3-diaminopropan-2-ol], has been synthesized and characterized using microanalysis, spectroscopy and X-ray crystallography. Structural analysis reveals a pentadentate

chelation behaviour of the trianionic ligand H3L, having a distorted octahedral coordination environ- ment around each iron(III) center with an FeN2O4

chromophore. Variable-temperature magnetic susceptibility measurements of1indicate an antiferromagnetic interaction between the two iron(III) centers, coupled with J=)28.5. 1behaves as an effective catalyst towards the oxidation of 3,5-di- tert-butylcatechol in different solvents, viz. methanol, dichloromethane and acetonitrile, to its corresponding quinone derivative in aerial oxygen. The reaction follows Michaelis-Menten enzymatic reaction kinetics with turnover numbers (Kcat) 7.51·10², 1.69·10³and 1.23·10³h⁾¹in methanol, dichloromethane and acetonitrile, respectively.

Elsevier Ltd.

Polyhedron 67, 8 January 2014

Contents lists available at ScienceDirect

Polyhedron

j o u r n a l h o m e p a g e : w w w . e l s e v i e r . c o m / l o c a t e / p o l y

(2)

Mohammad Hakimi, Zahra Mardani, Keyvan Moeini, Fabian Mohr and Manuel A. Fernandes

Polyhedron 67 (2014) 27

Palladium, cadmium and mercury complexes of 2-((2-((2-hydroxyethyl)amino)ethyl)amino)cyclohexanol: Synthesis, structural, spectral and solution studies

The reaction between 2-(2-amino-ethyla- mino)ethanol and cyclohexene oxide gives 2-((2-((2-hydroxyethyl)amino)ethyl)amino)cyclohexanol, HEAC. Four complexes of HEAC, including [Pd(HEAC)Cl2], [Cd₂(HEAC)₂(l-Br)₂Br₂], [Cd(HEAC)(OAc)₂] and [Hg(HEAC)Cl2], were prepared and identiﬁed by elemental analysis, FT-IR, Raman,¹H NMR spectroscopy and single- crystal X-ray diffraction. The redox properties of HEAC and the complexes were investigated by cyclic voltammetry experi- ments.

Adilson Luís Pereira Silva, Luciano Farias de Almeida, Aldaléa Lopes Brandes Marques, Jaldyr de Jesus Gomes Varela Jr, Auro Atsushi Tanaka and Albérico Borges Ferreira da Silva Polyhedron 67 (2014) 36

CO bonding in FeN4complexes and the effect of the macrocycle ligand: A DFT study

This paper presents a theoretical study using density functional theory (DFT) to investigate the bonding between carbon monoxide (CO) molecules and type FeN4

macrocycle complexes of iron to form FeN4–CO adducts. It has been demon- strated that the structure of the macrocycle ligand affected the ability of FeN4 complexes to bond with CO to form FeN4–CO adducts, electron transfers and p-back- donation to carbon monoxide, which en- abled characterization of the interfering effects of the different N4 ligands during the CO bonding process.

Ya-Juan Mu, Xiao-Li Ma, Bo Han, Gui-Fang Qin, Yan-Yan Niu and Hong-Xiao Lü

A series of Zn(II) coordination polymers derived from dicarboxylate acids and flexible imidazole-based ligands: Syntheses, crystal structures and photoluminescent properties

Five coordination polymers constructed from Zn(II) ions, flexible imidazole-based ligand and dicarboxylate co-ligands have been obtained and characterized. Com- plexes1,2and5show layered structures, but each of them contains different structural motifs; 3 and 4 exhibit different double chains. The structural differences demonstrate that the backbones of the dicarboxylate acids are a key point to form the ﬁnal coordination polymers.

Éva Sija, Christian G. Hartinger, Bernhard K. Keppler, Tamás Kiss and Éva A. Enyedy

Solution equilibrium studies of anticancer ruthenium(II)-g⁶-p-cymene complexes of pyridinecarboxylic acids

Solution speciation of Ru(II)-g⁶-p-cymene complexes of picolinic acid and its 6-methyl and 6-carboxylic acid derivatives.

Exclusive formation of mono-ligand complexes with high stability and bidentate (O,N) coordination mode. Stability order of complexes: dipicolinic acid >

picolinic acid > 6-methylpicolinic acid.

Monitoring of the replacement of the chlorido by the aqua ligand in the species [Ru(g⁶-p-cymene)(L)(Cl)].

v Contents

(3)

Ali Ourari, Yasmina Ouennoughi, Djouhra Aggoun,

Mohammad S. Mubarak,

Erick M. Pasciak and Dennis G. Peters Polyhedron 67 (2014) 59

Synthesis, characterization, and electrochemical study of a new tetradentate nickel(II)-Schiff base complex derived from ethylenediamine and 5¢-(N-methyl-N-phenylaminomethyl)-2¢- hydroxyacetophenone

A new tetradentate nickel(II)-Schiff base complex has been synthesized, its electrochemical behavior has been characterized, and the catalytic reduction of 1-iodooctane by its electrogenerated nickel(I) counter- part has been revealed.

Flavia Cagnin, Marian R. Davolos and Eduardo E. Castellano

A polymeric europium complex with the ligand thiophene-2-carboxylic acid: Synthesis, structural and spectroscopic characterization

The polymeric complex was obtained from an easy method of synthesis and the growth of crystal occur along the c axis.

The ⁵D0ﬁ⁷F4 transition of polymeric complex shows high intensity in contrast with monomeric one, which is derivative of polymeric (by thermal decomposition). The crystal size affects the⁵D0ﬁ⁷F0transition.

Yu-Cheng Wang, Ming-Yu Chen, Hong-Yi Wu, Jyh-Horung Chen, Shin-Shin Wang and Jo-Yu Tung Polyhedron 67 (2014) 73

Pt(II) 2-N substituted N-confused porphyrin:

Pt(2-NCH2COOCH2C6H5NCTPP), Pt(2-NCH2-p- C6H4CNNCTPP) and Pt(2-NCH2-p- C6H4CF3NCTPP)

Three diamagnetic Pt(II) complexes of N-confused porphyrin 4–6 have been synthesized and characterized.

Arineh Tahmasian, Vahid Safarifard, Ali Morsali and Sang Woo Joo Polyhedron 67 (2014) 81

Sonochemical syntheses of a new fibrous-like nano-scale strontium(II) 3D coordination polymer; precursor for the fabrication of a strontium carbonate nanostructure

Nanostructures of a new 3D Sr(II) coordination polymer, {[Sr(H2IDC)2(H2O)]Æ (H2O)}n (1) (H3IDC = 4,5-imidazoledicar- boxylic acid), have been synthesized by a sonochemical process and characterized by scanning electron microscopy, X-ray pow- der diffraction and FT-IR spectroscopy.

SrCO3nanostructures were simply synthesized by the solid-state transformation of compound1at 500C under an air atmo- sphere.

vi Contents

(4)

I.I. Ozturk, C.N. Banti, N. Kourkoumelis, M.J. Manos, A.J. Tasiopoulos,

A.M. Owczarzak, M. Kubicki and S.K. Hadjikakou

Synthesis, characterization and biological activity of antimony(III) or bismuth(III) chloride complexes with dithiocarbamate ligands derived from thiuram degradation

Three new antimony(III) or bismuth(III) chloride complexes (1–3) with dithiocarbamates derived from thiuram degradation were synthesized. Two poly- morphs were isolated, in case of1, (1a and1b)

depending on the preparation procedure followed.

Complex3is more active against HeLa, while1a,1b and2are more active against MCF-7 cells. Molecular docking studies explained the experimental IC50

values in terms of the known ligand binding domains of ER (1A52) while PLS analysis with only three latent components constructed a linear theoretical model which effectively predicts the experimental inhibi- tory activity of the complexes.

Saeed Farhadi, Kolsoum Pourzare and Shokooh Sadeghinejad

Synthesis and characterization of Co3O4

nanoplates by simple thermolysis of the [Co(NH3)6]2(C2O4)3Æ4H2O complex

Nanoplates of Co3O4were selectively prepared through solid-state thermolysis of the [Co(NH3)6]2(C2O4)3Æ4H2O complex at 350C without the need for an expensive and toxic solvent/surfactant or compli- cated equipment.

Keiko Kihara, Syohei Yamaguchi, Yasuo Kawahata, Masakazu Kita, Takayoshi Suzuki, Yukinari Sunatsuki, Masaaki Kojima and Kazuo Kashiwabara Polyhedron 67 (2014) 111

Preparation, crystal structures, and spectroscopic properties of cobalt(III) complexes bearing 2,4-pentanedionate (acac⁾) and 2-cya- noethylphosphines:trans-[Co(acac)2{P(CH2CH2CN)n

Ph3–n}]BF4(n= 1–3)

A series of bis(2,4-pentanedionato)cobal- t(III) complexes containing 2-cyanoethyl- phosphines, trans-[Co(acac)2{P(CH2CH2- CN)nPh3–n}2](BF4 or BPh4) (n= 1, 2 or 3) have been prepared, and their crystal structures and spectroscopic properties have been determined. In accord with the weak r-donor capability of 2-cyanoethyl- phosphines, the intensity of the lowest energy LMCT transition band of their complexes decreased remarkably, as compared to that of the corresponding PPh3

complex.

Igor Yu. Ilyin, Sergey N. Konchenko, Alexander V. Virovets,

Natalia V. Kuratieva and Nikolay A. Pushkarevsky Polyhedron 67 (2014) 115

Synthesis and structures of the first triiodoar- senate(III) anion, EtAsI3), and zwitterions, (HPy)2As2I6

The first examples of triiodoarsenates(III) have been synthesized from water solutions and are structurally characterized.

Different anionic species, [RAsI3]⁾, have different tendencies to coordinate to one or two more I atoms of neighboring anions, remain as such, or even exchange one I⁾ anion for other anions. This behaviour means that the bonding of As to the extra iodides is rather weak and largely depends on the crystal packing.

vii Contents

(5)

Okan Zafer Yes¸ilel, Yalçın Kılıç, Onur S¸ahin and Orhan Büyükgüngör Polyhedron 67 (2014) 122

One-dimensional coordination polymers of copper(II), cobalt(II), zinc(II) and cadmium(II) with glutarate andN-methylimidazole

In this work, four glutarate (glu) complexes were synthesized and characterized. Struc- tural analyses reveal that all the complexes exhibit one-dimensional (1D) linear chains bridged by the glutarate ligand, which further form 3D supramolecular networks viaintermolecularp p, C–H pand weak hydrogen bonding interactions. In the complexes, the glu ligand exhibits bis(monodentate) and bis(bidentate) bridging modes, being coordinated through two and four carboxylate oxygen atoms.

Linda D. Nyamen, Adeola A. Nejo, Viswanadha S.R. Pullabhotla,

Peter T. Ndifon, Mohammad Azad Malik, Javeed Akhtar, Paul OBrien and

Neerish Revaprasadu Polyhedron 67 (2014) 129

The syntheses and structures of Zn(II) hetero- cyclic piperidine and tetrahydroquinoline dithiocarbamates and their use as single source precursors for ZnS nanoparticles

The single X-ray structures ofbis(dipiper- idinyldithiocarbamato)zinc(II). bis(Ditetra- hydroquinolinyldithiocarbamato) zinc(II) complexes are reported. The complexes have been used as precursors for ZnS nanoparticles. Both complexes gave close to spherical and elongated ZnS particles which show quantum conﬁnement effects.

HDA 270 ∫C

Magdalena Grazul, Roland Sigel, Caroline Maake, Emina Besic-Gyenge, Ingo-Peter Lorenz, Peter Mayer, Malgorzata Czyz and Elzbieta Budzisz Polyhedron 67 (2014) 136

Synthesis, structure, physico-chemical and biological properties of metal(II) complexes with 5-amino-8-methyl-4H-benzopyran-4-one The 5-amino-8-methyl-4H-benzopyran-4-one ligand (1) has been used to obtain a new complexes with Co(II) (4) and Pd(II) (5) as well as previously characterized Cu(II) complexes (2and3). Both newly obtained compounds were characterized by IR and

mass spectrometry. The molecular structure of5has been determined by X-ray crystallography. Biological abilities, such as cytotoxicity against cancer cells and the inﬂuence of the obtained compounds on the DNA structure, have been evaluated. Also some physico- chemical properties, such as lipophylicity and stability in the aqueous solution, were tested.

Mannar R. Maurya, Sarita Dhaka and Fernando Avecilla

Synthesis, characterization and catalytic activity of dioxidomolybdenum(VI) complexes of tribasic pentadentate ligands

Dioxidomolybdenum(VI) complexes of tribasic pentadentate ligands have been isolated and characterized. Their catalytic activities for the oxidative bromination of styrene and the oxidation of methyl phenyl sulfide and benzoin are reported.

viii Contents

(6)

Antonio Rodríguez, M^aJosé Romero, Alberto Fernández,

Margarita López-Torres,

Digna Vázquez-García, Leticia Naya, José M. Vila and Jesús J. Fernández Polyhedron 67 (2014) 160

Dinuclear cyclometallated platinum(III) complexes. Relationship between molecular structure and crystal packing

New Pt(II) dimeric cyclometallated complexes with [N,S] bridging ligands have been synthesized The introduction of small changes in their molecular causes large changes in the intermolecular interactions and in the crystal packing. Furthermore, in one of these complexes the presence of weak C–Cl p interactions with solvent molecules significantly modifies the molecular conformation.

Muniyandi Sankaralingam and Mallayan Palaniandavar Polyhedron 67 (2014) 171

Diiron(III) complexes of tridentate 3N ligands as functional models for methane monooxy- genases: Effect of the capping ligand on hydroxylation of alkanes

A series of diiron(III) complexes has been isolated and studied as catalysts for alkane hydroxylation reactions using m-CPBA as the oxidant. Interestingly, the 3/2 bond selectivity observed for the hydroxylation of adamantane for the complex of the 3N capping ligand with two pyridyl donors (L1) is the highest among the present complexes, suggesting that the capping ligand plays an important role in determin- ing the product selectivity.

R R'

[Fe2(O)(OBz)2(L)2](ClO4)2 1- 6

m-CPBA R R'

OH

R₁ N R₂

H

R₁ = R₂= -Py (L1) R₁ = -Py; R₂= -6MePy (L2) R1 = -Py; R2 = -N-MeIm (L3) R1 = -Py; R2 = -bzIm (L4) R1 = -Py; R2 = -CH2NMe2(L5) R1 = R2 = -bzIm (L6) L =

Prasanta Kumar Bhaumik, Klaus Harms and Shouvik Chattopadhyay

Copper(II) complexes with tridentate N2O do- nor Schiff bases: Modulation of crystalline architectures through supramolecular interactions

Three mononuclear copper(II) complexes have been synthesized and characterized by elemental analysis, IR and UV–Vis spectroscopy and X-ray crystallography.

All the complexes are monomeric. The copper(II) centre assumes a square planar geometry in each of the complexes. Weak forces like H-bonding, lone pair p and p p interactions lead to various supramolecular architectures.

Phillip D. Atwood, Aylin Akyant, Tamila Shalumova, Joseph M. Tanski and J. Frantz Folmer-Andersen

Structural studies of diaminocyclohexane- containing aza-crown ether macrocycles and their Zn(II) complexes

Crystallographic, NMR and molecular mod- eling studies of a variety of diaminocyclohexane-containing macrocycles and their Zn(II) complexes have been performed.

ix Contents

(7)

Chun Ji Wu, Saira Nayab, Hyun Yul Woo, Jong Sok Hahn, Ho Seong Lee,

Sang Ook Kang and Hyosun Lee Polyhedron 67 (2014) 199

Synthesis and X-ray crystal structure of [Me2Si(C5Me2H2)(^tBuN)]MCl2 (M = Ti, Zr) bearing a 3,4-dimethylcyclopentadienyl ring:

Investigation of the substitution effect on the cyclopentadienyl (Cp) ring for catalytic perfor- mance in ethylene/1-octene (co)polymerization

The dimethylsilylene-bridged 3,4-dimethylcyclopentadienyl/amido zirconium/

titanium complexes [Me2Si(C5Me2H2)- (^tBuN)]MCl2(M = Ti, Zr) were synthesized and structurally characterized. They exhib- ited a high activity and incorporation ratio of 1-octene towards ethylene/1-octene copolymerization.

Won Seok Cho, So Han Kim, Da Jung Kim, Sang-deok Mun, Ran Kim, Min Jeong Go, Myung Hwan Park, Min Kim,

Junseong Lee and Youngjo Kim Polyhedron 67 (2014) 205

Zirconium complexes with pendant aryloxy groups attached to the metallocene moiety by ethyl or hexyl spacers

Zirconium complexes containing cyclopentadienyl ring and aryloxy group linked by ethyl or hexyl chain were synthesized. In the presence of MAO cocatalyst, zirconium complexes with Cp ring and aryloxy group linked by hexyl spacer showed higher catalytic activity towards ethylene polymerization than ones linked by ethyl spacer.

José Martínez-Lillo Polyhedron 67 (2014) 213

Hexabromorhenate(IV) salt of atrans-dioxorhe- nium(V) cation: X-ray structure and magnetic properties

A novel rhenium(IV)–rhenium(V) compound of formula NBu4[ReO2(py)4][ReBr6] (1) (NBu4= tetra-n-butylammonium cation) was prepared, by reacting [ReBr6]²⁾ and pyridine (py) in acetonitrile, and its crystal structure solved by X-ray diffraction. Compound1is the ﬁrst reported salt of thetrans-[ReO2(py)4)]⁺cation in where a paramagnetic and highly anisotropic metal ion acts as anion.

Yao-Cheng Shi, Hao Tan and Ying Shi Polyhedron 67 (2014) 218

Synthesis and stereochemistry of diiron complexes generated from the reactions of iron carbonyls with 2-thienyl thiol and 2-thienyl methanethiol

New diiron complexes have been synthesized by the reactions of [HNEt3][(l- RS)Fe2(CO)6(l-CO)] and [HNEt3][(l- RS)Fe2(CO)6(l-CS2)], generated from a mix- ture of Fe3(CO)12, Et3N and 2-thienyl thiol or 2-thienyl methanethiol with electro- philes. The structures of complexes 11of 12have been unequivocally determined by X-ray crystallography. Potential isomeriza- tions in solution have been investigated using¹H,¹³C and³¹P NMR spectroscopy.

x Contents

(8)

Kathrin H. Hopmann, Annemarie Kuhn and Jeanet Conradie

Substitution reactions of dichlorobis(betadike- tonato-O,O¢)titanium(IV) complexes with aryl diolato ligands: An experimental and computa- tional study

The kinetics of substitution of a bidentate aryl-diolato ligand for the two monodentate Cl⁾ ligands in Ti(b-diketonato)2Cl2

proceeds in two stepsviaa 6-coordinated intermediate according to an interchange mechanism.

Cl Cl O O Ti O

O O

Cl O O Ti O

O HO

O O

O O Ti O

O -HCl OH

OH -HCl

+

Éva A. Enyedy, Gabriella M. Bognár, Nóra V. Nagy, Tamás Jakusch, Tamás Kiss and Dinorah Gambino Polyhedron 67 (2014) 242

Solution speciation of potential anticancer metal complexes of salicylaldehyde semicarbazone and its bromo derivative

Stability of salicylaldehyde semicarbazone complexes formed with Ga(III) is higher, while with Cu(II) is lower compared to the analogue thiosemicarbazone. Bromine substituent on the phenol ring has no significant impact on the stability but the bioactivity.

Zhi-Hao Chen, Yue Zhao, Peng Wang, Shui-Sheng Chen and Wei-Yin Sun Polyhedron 67 (2014) 253

Zinc(II) and cadmium(II) complexes with mixed 1,3-di(1H-imidazol-4-yl)benzene and cyclohexanedicarboxylate ligands: Synthesis, structure and property

Eight new coordination polymers with different cyclohexanedicarboxylate and rigid ditopic 4-imidazole-containing ligands have been obtained and found to show different structures. The results revealed that the reaction temperature has effect on the manifestation of the resulting structures.

Sang Eun Song, Quang Trung Nguyen, Jeong Jae Yu, Hong-In Lee and Jong Hwa Jeong

Synthesis and characterisation of Cu(II) complexes bearing N,N¢-di(methoxybenzyl)-(R,R)- 1,2-diaminocyclohexane as catalysts for the asymmetric nitroaldol reaction

Enantiopure Cu(II) complexes with N,N¢- di(p-methoxybenzyl)-(R,R)-1,2-diaminocyclohexane, N,N¢-di(m-methoxybenzyl)- (R,R)-1,2-diaminocyclohexane, and N,N¢- di(m-methoxybenzyl)-(R,R)-1,2-diaminocyclohexane ligands were synthesised and characterised by the X-ray crystal structures. Their double catalytic activation toward the asymmetric nitroaldol reaction was examined. The reaction yield was moderate with an enantiomeric excess of up to 87%.

xi Contents

(9)

Beata Warzajtis, Urszula Rychlewska,_ Dušanka D. Radanovic´,

Ivana M. Stanojevic´, Nenad S. Draškovic´, Niko S. Radulovic´ and Miloš I. Djuran Polyhedron 67 (2014) 270

Carboxylato-bridged polymeric complexes of chromium(III) with the hexadentate (±)-1,3- pentanediamine-N,N,N¢,N¢-tetraacetate ligand carrying different counter ions. Stereospeciﬁc formation and crystal structures of Na[Cr(1,3- pndta)]ÆH2O, K[Cr(1,3-pndta)]ÆH2O and Ca[Cr(1,3-pndta)]2Æ4H2O

The X-ray crystallography, electronic absorption and¹H NMR spectroscopy have been applied to investigate the effects of the counter ion and the diamine ring substitution on the self organization and degree of hydration of chromium(III) complexes with the hexadentate (±)-1,3-pentanediamine-N,N,N¢,N¢-tetraacetate ligand.

Snezˇana Rajkovic´, Urszula Rychlewska, Beata Warzajtis, Darko P. Ašanin,_ Marija D. Zˇivkovic´ and Miloš I. Djuran Polyhedron 67 (2014) 279

Disparate behavior of pyrazine and pyridazine platinum(II) dimers in the hydrolysis of histidine- and methionine-containing peptides and unique crystal structure of {[Pt(en)Cl]2- (l-pydz)}Cl2 with a pair of NH Cl⁾ HN hydrogen bonds supporting the pyridazine bridge

Unlike its pyrazine analog, the dimeric pyridazine-bridged Pt(II) complex acts as regioselective catalytic reagent in the hydrolysis of the peptides containing both methionine and histidine residues

Min Jeong Go, Ji Min Lee, Kang Mun Lee, Chang Hwa Oh, Ka Hyun Park,

So Han Kim, Min Kim,

Hyoung-Ryun Park, Myung Hwan Park, Youngjo Kim and Junseong Lee Polyhedron 67 (2014) 286

Titanium complexes containing bidentate ben- zotriazole ligands as catalysts for the ring opening polymerization of lactide

The selective syntheses of titanium complexes containing the 2-(2H-ben- zo[d][1,2,3]triazol-2-yl)-4,6-di-tert-pentyl- phenol (LH) ligand were unprecedentedly achieved by changing the solvents or metal precursors. Their solid state structures were revealed by single-crystal X-ray analyses. They were proven as effective catalysts for the controlled ring opening polymerization (ROP) of lactide (LA) as shown by the linearity of the molecular weight versus [LA]/[Ti] ratio as well as very narrow PDI values of the PLA polymers obtained.

Gabriele Albertin, Stefano Antoniutti, Laura Bonaldo and Jesús Castro Polyhedron 67 (2014) 295

Reactivity with aryldiazonium cations of hydrazine complexes of ruthenium and osmium

The reaction of bis(hydrazine) complexes [M(NH2NH2)2L4](BPh4)2(M = Ru, Os) with aryldiazonium salt affording bis(amine) [M(NH3)2L4](BPh4)2, chloro-amine [MCl(NH3)L4]BPh4, and bis(hydrazone) derivatives [M{NH2N@C(CH3)2}2L4](BPh4)2 is described.

Os L

L NH2NH2

NH2NH2 L

L 2+

Os L

L NH3

NH3 L

L 2+

ArN2+,CH2Cl2

Os L

L NH2N=C(CH3)2 NH2N=C(CH3)2 L

L

2+

ArN2+,(CH3)2CO L = P(OEt)3; Ar = p-tolyl

xii Contents

(10)

Irina Voda, Constantin Turta, Vasile Lozan, Andrew C. Benniston and Ulrich Baisch

Synthesis of a zinc(II) cage-like structure based on 1,4-bis((1H-imidazoyl-1-yl)methyl)benzene and 5-sulfoisophthalic acid

Kaleswara Rao Basvani, Olga S. Fomina, Dmitry G. Yakhvarov and

Joachim Heinicke Polyhedron 67 (2014) 306

Synthesis and properties of zwitterionic phosphonioglycolates

The title compounds are formed from the secondary diphenylphosphane with two or from tertiary phosphanes with one equiva- lent of glyoxylic acid hydrate in diethyl ether. The diphenylphosphonioglycolate 2 is soluble in D2O with partial solvolysis to1 whereas the triaryl- or trialkylspecies3are highly sensitive to OH or OD compounds.

Heating or prolonged storage (over months to years) leads to phosphine oxides4.

Hui-Fen Qian, Yuan Dai, Jiao Geng, Li Wang, Cheng Wang and Wei Huang Polyhedron 67 (2014) 314

A flexible multidentate Schiff-base ligand having multifarious coordination modes in its copper(II) and cadmium(II) complexes

The coordination chemistry of a flexible multidentate Schiff-base ligand has been explored. One mononuclear Cu(II) complex (1) and three Cu(II) and Cd(II) 1D coordination polymers (2–4) have been obtained under different experimental conditions, and LH exhibits multifarious coordination modes.

Shefali Saha (Halder), Partha Mitra and Chittaranjan Sinha

Synthesis, structure and photochromism of zinc(II) complexes of alkylthioarylazoimida- zoles

The [Zn(SRaaiNR¢)(H2O)X2] (SRaaiNR¢= 1-alkyl-2- {(o-thioalkyl)phenylazo}imidazole) complexes have been characterized by different spectral data and a single crystal structure in one case. UV light irradia- tion in acetonitrile solution of the complexes shows E-to-Z (E and Z refer totransandcis-conﬁguration) isomerisation of the coordinated SRaaiNR¢ ligand

about the –N@N– bond. The rate of isomerisation follow: [Zn(SRaaiNR¢)(H2O)Cl2] < [Zn(SRaaiNR¢)(- H2O)Br2] < [Zn(SRaaiNR¢)(H2O)I2]. The quantum yields (/EﬁZ) and activation energies (Ea) of the isomerisation of the complexes are lower than those of the free ligands. The decrease in electronegativity of X increases the rate of E-to-Z photoisomerisation.

250 300 350 400 450 500 550 600 0.00

0.25 0.50

decerasing

250 300 350 400 450 500 550 600 0.0 0.1 0.2 0.3 0.4 0.5 0.6

0.7 trans

339 cis

Absorbance(a.u)

W avelength(nm) 339

Absorbance (a.u.)

Wavelength(a.u)

xiii Contents

(11)

Kent A. Maghacut, Alessa B. Wood, Walter J. Boyko, Timothy J. Dudley and Jared J. Paul

Structural, electronic and acid/base properties of [Ru(tpy)(tpyOH)]²⁺ and [Ru(tpyOH)2]²⁺

(tpy = 2,2¢:6¢,2⁰⁰-terpyridine, tpyOH = 4¢-hydroxy-2,2¢:6¢,2⁰⁰-terpyridine)

A ruthenium complex containing hydroxyl- substituted terpyridyl ligands gives significant mixing between the metal d orbitals and ligand orbitals upon deprotonation.

Subhi A. Al-Jibori, Adnan T. Habeeb, Ghassan H.H. Al-Jibori, Noor A. Dayaaf, Kurt Merzweiler, Christoph Wagner, Harry Schmidt and Graeme Hogarth Polyhedron 67 (2014) 338

Palladium(II) saccharinate (sac) and thiosac- charinate (tsac) complexes with supporting amino- and acetylamino-thiazole ligands:

Crystal structures of trans-[PdCl2(abzt)2]Ædmf (abzt = 2-aminobenzothiazole), trans-[PdCl2- (bzta)2].dmf (bzta = 2-acetylaminobenzothia- zole) andtrans-[Pd(sac)2(abzt)2]Æ2dmf

A range of amino- and acetylamino-thiazole complexes trans-[PdCl2L2] have been prepared which bind through the endocyc- lic nitrogen as shown by X-ray crystal structures of trans-[PdCl2(abzt)2]Ædmf and trans-[PdCl2(bzta)2]Ædmf. Addition of so- dium saccharinate (Nasac) yields trans- [Pd(sac)2L2] in which the saccharinate anions are coordinated through nitrogen as shown by the X-ray crystal structure of trans-[Pd(sac)2(abtz)2]Æ2dmf but with thio- saccharinate (tsac) the ligands coordinate through the sulfur of the thiolate group as evidenced by spectroscopic studies.

Pd C N

S O

O CN

S

O O O

O N S

NH2 N S

NH2

anti-sac/anti-abzt l

C Pd N S

NH2

syn-abzt S N

NH2

Cl 2 Na(sac)

- 2 NaCl

Elif Okutan, Bünyemin Ços¸ut,

Saadet Beyaz Kayıran, Mahmut Durmus¸, Adem Kılıç and Serkan Yes¸ilot

Synthesis of a dendrimeric phenoxy-substituted cyclotetraphosphazene and its non-covalent interactions with multiwalled carbon nano- tubes

In the present study, we describe the synthesis and characterisation of a soluble multi-walled carbon nanotube/dendrimeric phenoxy-substituted cyclotetraphosphazene nanocomposite via non-covalent

‘‘p–p’’ interactions. The thermal, morpho- logical and spectroscopic properties of the hybrid material are investigated. The hybrid material shows both high thermal stability and excellent fluorescence quenching efficiency. Also the hybrid shows significant dispersion stability in common organic solvents.

Alexandra Yu. Ledneva, Konstantin A. Brylev,

Anton I. Smolentsev, Yuri V. Mironov, Yann Molard, Stephane Cordier, Noboru Kitamura and

Nikolay G. Naumov Polyhedron 67 (2014) 351

Controlled synthesis and luminescence properties of trans-[Re6S8(CN)4(OH)_2)n(H2O)n]ⁿ⁾⁴ octahedral rhenium(III) cluster units (n= 0, 1 or 2)

The preparation and controlled separation of trans-[Re6S8(CN)4(OH)(H2O)]^3– and trans-[Re6S8(CN)4(H2O)2]^2– cluster units from trans-[Re6S8(CN)4(OH)2]^4– was achieved by pH adjustment. Determination of acid–base constants, luminescence char- acteristics of aqueous solutions of the complexes, isolation and characterization of novel compounds based on these cluster anions are reported herein.

–H⁺ –H⁺

+H⁺ +H⁺

xiv Contents

(12)

Graham Steel, Abdullahi Mustapha, John Reglinski and Alan R. Kennedy Polyhedron 67 (2014) 360

The nickel, copper and zinc complexes of potentially heptadentate nitrogen–sulfur donor ligands

A multidentate ligand (L) which potentially contains four nitrogen and three sulfur donors has been synthesised. L has been reacted with the nitrates of nickel, copper and zinc to give a series of L⁴M(NO3) complexes. The nickel complex is six coordinate and both the copper and zinc are ﬁve coordinate. The nitrate was re- placed by halide and nitrite in the copper system giving rise to a series of simple complexes.

N N

N Cu

N R

R R

StBu MeOH/Δ

X N

HN 3 S

+ MX₂ R =

tBu M = Ni, X = NO₃, M = Cu, X = NO3, NCS, Br, BF4, NO2. M = Zn, X = NO3

Anthony M.J. Lees and Andrew W.G. Platt Polyhedron 67 (2014) 368

Complexes of lanthanide chlorides with tricyclohexylphosphine oxide. The single crystal X-ray structures and solution properties of pentagonal bipyramidal complexes [Ln(H2O)5- (Cy3PO)2]³⁺ÆCy3POÆ3Cl⁾Ln = Dy, Er

The crystal structures of the complexes Ln(Cy3PO)n(H2O)5ÆLÆ3ClÆH2OÆEtOH show a pentagonal bipyramidal geometry about the lanthanide ion.

Israel Alfaro-Fuentes,

Horacio López-Sandoval, Edgar Mijangos, Angélica M. Duarte-Hernández,

Germán Rodriguez-López, Margarita I. Bernal-Uruchurtu, Rosalinda Contreras,

Angelina Flores-Parra and Norah Barba-Behrens Polyhedron 67 (2014) 373

Metal coordination compounds derived from tinidazole and transition metals. Halogen and oxygen lone pairÆÆÆpinteractions

Metal organic coordination compounds from CuCl2 or ZnX2 and tinidazole were synthesized. The [Cu(tnz)2Cl2] compounds presented two conformers, the kinetic one has extended ligands while the thermodynamic presents a folded ligand with SOÆÆÆimidazole interactions.

Calculations showed that the folded structure is more stable than the extended one, due to the electroaccepting properties of the imidazole ring promoted by coordination of the metal ion or by protonation. The coordination compounds present different metal organic compounds, with several p contacts: CÆÆÆC, ClÆÆÆp, BrÆÆÆp, SOÆÆÆpand hydrogen bonding.

M. Zalas, B. Gierczyk, M. Klein, K. Siuzdak, T. Pe˛dzin´ski and T. Łuczak

Synthesis of a novel dinuclear ruthenium polypyridine dye for dye-sensitized solar cells application

A novel dinuclear ruthenium complex has been successfully synthesized and used as a sensitizing dye in DSSC, givingJsc= 1.01 mA cm⁾²,Voc= 520 mV andg= 0.32%.

xv Contents

(13)

Sheng Hu, Peng Zhang, Fang-Yong Yu, Mei-Xian Chen and Dian-Rong Lin Polyhedron 67 (2014) 388

Cooperative effect of bicyclo[2.2.2]oct-7-ene- 2,3,5,6-tetracarboxylate and selective bipyridine ligands on coordination network assembly and metallocycle generation

The combination of a tetradentate bicyclo[2.2.2]oct-7-ene-2,3,5,6-tetracarboxylate ligand and three types of bipyridine ligands afford three mixed-ligand frame- works, where the acidic ligand of change- able coordination modes develops various secondary building units, such as metallo- cycles and chains, which are interlinked by the auxiliary bipyridine ligands with in- creased length and different conforma- tions, displaying interesting structural diversity.

Rahman Bikas,

Hassan Hosseini-Monfared, Milosz Siczek, Angel Gutiérrez, Marta S. Krawczyk and Tadeusz Lis Polyhedron 67 (2014) 396

Syntheses, crystal structures and magnetic studies of new 2D coordination polymers containing dinuclear manganese(II) repetitive units using a ditopic isonicotinhydrazone based N,N,O-donor ligand

Syntheses and structures of three new N-arylideneisonicotinhydrazide Mn(II) complexes with pseudohalide ligands are reported. Magnetic properties of two 2D coordination polymers are determined.

Michael R. McDevitt and Fred L. Urbach Polyhedron 67 (2014) 405

Mechanism of a dinuclear copper complex catalyzed autoxidation of 3,5-di-tert-butylcatechol

The autoxidation of 3,5-di-tert-butylcatechol (H2DTBC) was catalyzed by the dicopper (II) complex, Cu2(dppn)(OH)Cl3ÆH2O (Cu2(dppn)(OH)³⁺). Kinetic studies determined that the reactants were ﬁrst order in the concentrations of the catalytic dinuclear copper species, molecular oxygen, and H2DTBC and inverse ﬁrst order in the proton concentration. An experimental rate law, consistent with the kinetic data, was proposed and suggested that both O2and

HDTBC⁾were associated with the dinuclear copper complex in the transition state. The second order rate constant was calculated to be 189 ± 19 M⁾¹s⁾¹. Furthermore, the stoichiometry of the catalyzed reaction was the same as tyrosinase-catalyzed oxida- tions and O2was reduced to water in a four electron process. The 3,6-bis(2¢-pyridyl)pyridazine (dppn) chelate served as the binucleating ligand and provided a rigid and sterically unencumbered platform for catalytic interaction of the dicopper core with O2

and HDTBC⁾. The dppn chelate also afforded the dicopper core the necessary coordination ﬂexibility required for each copper ion to simultaneously cycle between square pyramidal cupric and tetrahedral cuprous ligand ﬁeld geometries.

Marzena Fandzloch, Andrzej Wojtczak, Jerzy Sitkowski and Iwona Łakomska Polyhedron 67 (2014) 410

Interaction of ruthenium(II) and ruthenium(III) ions with 5-methyl-1,2,4-triazolo[1,5-a]pyrimidin-7(4H)-one

Ru(II) and Ru(III) complexes with 5-methyl-1,2,4- triazolo[1,5-a]pyrimidin-7(4H)-one (HmtpO) of the formula cis-[RuCl2(dmso)3(HmtpO)] (1) and trans- [RuCl4(dmso)(H2mtpO)]Æ4H2O (2) have been synthesized and characterized using different spectroscopic techniques (IR,¹H–¹⁵N HMBC,¹H–¹³C HSQC,¹H–¹³C HMBC and EPR). Spectroscopic studies reveal a

monodentate coordination of the heterocycle ligand (HmtpO) via N3 to the ruthenium(II) and rutheniu- m(III) ions. In addition, the X-ray crystal structure was determined for complex (2). The compound crystallized in the triclinic group P1. The asymmetric unit of the structure consists of two complex molecules (2aand2b) and 8 water molecules. The equatorial positions are occupied by four chloride ions, while the N3 bonded, protonated H2mtpO⁺and S-bonded dmso ligands are located in axial positions.

Complex (1) has been screened forin vitrocytotoxi- city against two human cells: non-small cell lung carcinoma (A549) and breast cancer (T47D). The ruthenium(II) complex was found to be less active than cisplatinum.

xvi Contents

(14)

Chang-Gong Li, Yong Zhu, Xing-Xing Jiao and Xiao-Qin Fu

Synthesis, characterization and electrochemis- try of phenyl-functionalized diiron propane- dithiolate complexes

The phenyl-functionalized diiron propane- dithiolate complex [l-(SCH2)2CHC6H5]Fe2- (CO)6 (1) and its carbonyl substitution derivatives [l-(SCH2)2CHC6H5]Fe2(CO)5- (PPh3) (2), [l-(SCH2)2CHC6H5]Fe2(CO)5- (j-dppm) (3) and [l-(SCH₂)₂CHC₆H₅] Fe2(CO)4(l-dppm) (4) have been synthesized.

S S

Fe Fe

H

OC CO

SH SH

Fe3(CO)12 dppm

S S

Fe Fe

H

OC CO

CO OC

Ph2P PPh2

Ivan V. Skabitskiy, Alexander A. Pasynskii,

Sergey G. Sakharov and Vitaly A. Grinberg Polyhedron 67 (2014) 422

The syntheses and structures of mixed-metal dichalcogen complexes [CpMn(CO)2]2- (E2)Pt(PPh3)2

The mixed-metal platinum–manganese complexes [CpMn(CO)2]2(E2)Pt(PPh3)2

were prepared by the reaction of the manganese dichalcogenide complexes [CpMn(CO)2]2(E)2 (E = S, Se) or [CpMn(CO)2]3(Te)2 with the platinum(0) complex (PPh₃)₂Pt(PhCBCPh).

Timothy C. Johnstone Polyhedron 67 (2014) 429

The crystal structure of oxaliplatin: A case of overlooked pseudo symmetry

The previously reported crystal structures of oxaliplatin have been reevaluated to take into consideration overlooked pseudosymmetry. Crystallographic analysis confirmed the absolute configuration of oxaliplatin, the oxaliplatin precursor Pt(R,R-DACH)I2, and the oxaliplatin derivative trans-[Pt(R,R-DACH)(oxalate)(OH)2].

Optical rotatory dispersion measurements and theoretical calculations conﬁrm that the symmetry in the crystal structure is pseudosymmetry.

Mannar R. Maurya, Nikita Chaudhary and Fernando Avecilla

Polymer-grafted and neat vanadium(V) complexes as functional mimics of haloperoxidases

Polymer-grafted and neat vanadium(V) complexes as functional mimics of haloperoxidases are reported.

xvii Contents

(15)

Radek Ševcˇík, Jakub Vaneˇk, Prˇemysl Lubal, Zuzana Kotková, Jan Kotek and Petr Hermann Polyhedron 67 (2014) 449

Formation and dissociation kinetics of copper(II) complexes with tetraphosphorus acid DOTA analogs

The copper(II) complexes with cyclen- based ligands having four phosphorus-acid pendant arms following the impact of derivatization on the complex formation/dissociation were studied. These metal complexes are less kinetically inert than the [Cu(dota)]^2–complex.

N N

P P

O

O^- O -O

O O

-O O^-

R R

N N

P P

O

O^- O -O

O O

-O O^-

R R

+ Cu²⁺

kf kd

Cu²⁺

R= H, Ph, OC₂H₅

Mürsel Arıcı, Okan Zafer Yes¸ilel, Onur S¸ahin and Orhan Büyükgüngör Polyhedron 67 (2014) 456

Two dimensional coordination polymers with 3,3¢-thiodipropionate: An unprecedented coordination mode and strong hydrogen-bond network

In this study, four new thiodipropionate coordination polymers were synthesized and characterized. The tdp ligand exhibits an unprecedented coordination mode, namely the l3-jO,O¢:jO⁰⁰:jO⁰⁰¢-bridging mode, and complexes1–4exhibit 2D layers with a point symbol of 3³Æ4³Æ5⁴which are extended into 3D supramolecular frame- works by R22(8) hydrogen-bonding motifs.

Barbara Morzyk-Ociepa, Mariusz Kokot, Ewa Rózycka-Sokołowska,_

Krystyna Giełzak-Koc´win,

Beata Filip-Psurska, Joanna Wietrzyk and Danuta Michalska

Crystal structure, infrared and EPR spectra and anticancer activityin vitroof the novel manganese(II) complexes of indolecarboxylic acids

Indole-2-carboxylic acids act as bidentate bridging ligands binding Mn(II) in an abnormal non-planar skew-skew mod- e.The Mn-O(carboxyl) stretching vibrations are in the range 288-245 cm⁾¹, Mn- O(water) at 416 and 381 cm⁾¹, the in FT-IR.Mn(II) complexes with indole-2-carboxylic acids exhibit signiﬁcant cytotoxicity against six leukemia cell lines, comparable to cisplatin.

Sofía E. Domínguez, Pablo Alborés and Florencia Fagalde

Photoinduced linkage isomerization in new rhenium(I) tricarbonyl complexes coordinated to N-nitrite and O-nitrite

Two new tricarbonyl polyppyridyl Re(I) complexes with nitrite ion in different binding mode have been synthesized and characterized by spectroscopy, electro- chemistry and DFT calculations. Both complexes present photo-isomerization and electrochemical oxidation, interesting in the design of new materials or as precursors for nitrosyl compounds.

xviii Contents

(16)

Éva Sija, Nóra Veronika Nagy, Valentina Gandin, Christine Marzano, Tamás Jakusch, Annalisa Dean, Valerio B. Di Marco and Tamás Kiss Polyhedron 67 (2014) 481

Hydroxypyridinecarboxylic acid derivatives influencing metal ion levels in the brain:

Equilibrium complexation studies with Cu(II) and Zn(II)

Complex formation between two hydroxypyridinecarboxylic acids and Cu(II) and Zn(II) ions has been characterised by pH-potentiometric and spectroscopic (UV–Vis, EPR and¹H NMR) methods.

0.0 0.2 0.4 0.6 0.8 1.0

2 3 4 5 6 7 8

Fraction Cu(II)

pH

CuL₂ Cu²⁺

CuL⁺

N O-

COO- H₃C

CH 3

Cu2+

N

O- -OOC

CH 3 CH

3

N O^-

COO- H3C

CH3 Cu²⁺

Cu²⁺ Cu²⁺

Yu-Long Li, Bin Xie, Li-Ke Zou, Xiao Lin, Yi Yang, Sha-sha Zhu and Tao Wang Polyhedron 67 (2014) 490

New synthesis and structural characterization of O-aryldithiophosphato and O-alkyldithiophosphato nickel complexes with diphosphine ligands

The complexes [Ni(S2P{O}OCH2CH2Ph)(dppe)] (1), [Ni(S2P{O}OCH2CH2Ph)(dppv)] (2), [Ni(S2P{O}OCH2- CH2Ph)(dppb)] (3), [Ni(S2P{O}OCH2CH3)(dppe)] (4), [Ni(S2P{O}OCH2CH3)(dppv)] (5) have been fully characterized by elemental analysis and IR,¹H,¹³C,³¹P NMR spectroscopies. In addition the molecular

structures of1–4were established by X-ray crystallography.

In this study, ﬁve O-aryldithiophosphato and O- alkyldithiophosphato nickel complexes with diphosphine ligands have been synthesized by the con- densation pathway. The complexes have been characterized by elemental analysis and spectroscopy, as well as for four by X-ray crystallography.

The synthesis method is simple and efﬁcient.

PPh2 Ni Ph2 P

Cl Cl

PPh2 Ni Ph2 P

Cl Cl PPh2

Ni Ph2 P

Cl Cl

PPh2 Ni Ph2 P

S S

PO OR PPh2

Ni Ph2 P

S S

PO OR

PPh2 Ni Ph2 P

S S

PO OR 1, R = CH2CH2Ph 4, R = CH2CH3

(RO)2PSH Et2NH

2, R = CH2CH2Ph 5, R = CH2CH3

3, R = CH2CH2Ph S

Ayan Patra, Gopal C. Giri, Tamal K. Sen, Luca Carrella, Swadhin K. Mandal and Manindranath Bera

Bis(l-alkoxo) bridged dinuclear Cu^II2and Zn^II2

complexes of an isoindol functionality based new ligand: Synthesis, structure, spectral characterization, magnetic properties and catechol oxidase activity

Two new dinuclear copper(II) and zinc(II) complexes, [Cu2(Hhdpa)2]Æ2CH3OHÆ6H2O (1) and Na4[Zn2(hdpa)2](OAc)2 (2), of an isoindol functionality based new dinucleating ligand, H3hdpa (H3hdpa=2-({[2-

hydoxyethyl]-[2-hydroxy-3-(1-oxo-1,3-dihydro-isoindol-2-yl)-propyl]-amino}-methyl)-benzoic acid), have been synthesized and characterized. Variable- temperature (2–300 K) magnetic susceptibility measurements show the presence of antiferromagnetic interactions (J=)52.20 cm⁾¹) between the two copper(II) centers in complex 1. Catechol oxidase activity of complexes1and2has been investigated in methanol solution by the UV–Vis spectrophoto- metric technique using 3,5-di-tert-butylcatechol as a model substrate. DFT calculations have been performed to ﬁnd the Fukui functions at the metal centers in complexes1and2to predict the possible metal centers involved in the binding process with 3,5-DTBC during the catalytic oxidation reactions.

Flora L. Thorp-Greenwood,

James A. Platts and Michael P. Coogan Polyhedron 67 (2014) 505

Experimental and theoretical characterisation of phosphorescence from rhenium polypyridyl tricarbonyl complexes

Synthesis and spectroscopy, coupled with DFT calculations, are used to probe the effect of ligand structure on absorption and emission spectra of rhenium polypyridyl tricarbonyl complexes.

xix Contents

(17)

Kazuhiro Uemura, Yuko Sugiyama, Erina Yasuda and Masahiro Ebihara Polyhedron 67 (2014) 513

Syntheses, crystal structures and copper-binding capabilities of amidate-hanging platinum mononuclear complexes containing alkylamine moieties

Two kinds of Pt mononuclear complex containing propyl or butyl amines, which can bind to second metals, have been synthesized.

Annalisa Dean, Maria Grazia Ferlin, Mirjana Cvijovic, Predrag Djurdjevic, Francesco Dotto, Denis Badocco, Paolo Pastore, Alfonso Venzo and Valerio B. Di Marco

Evaluation of 1,2-dimethyl-3-hydroxy-4-pyridinecarboxylic acid and of other 3-hydroxy-4- pyridinecarboxylic acid derivatives for possible application in iron and aluminium chelation therapy

The following properties of 1,2-dimethyl- 3-hydroxy-4-pyridinecarboxylic acid (DT712) were studied: binary complex formation with Fe(III) and Al(III), ternary complex formation with citric acid, kinetics of Fe(III) removal from transferrin, stan- dard reduction potentials of Fe(III)/DT712 complexes, kinetics of complex formation.

According to the results obtained, DT712 is a promising candidate for iron chelation therapy.

Grzegorz Romanowski, Jaromir Kira and Michał Wera

Five- and six-coordinate vanadium(V) complexes with tridentate Schiff base ligands derived fromS(+)-isoleucinol: Synthesis, characterization and catalytic activity in the oxidation of sulﬁdes and oleﬁns

A series of five-coordinate vanadium(V) complexes with chiral tridentate Schiff base ligands, obtained by a single conden- sation ofS(+)-isoleucinol with salicylaldehyde and its derivatives, and also six- coordinate with additional monoanionic bidentate benzohydroxamate co-ligand, were prepared and characterized. The ﬁve-coordinate vanadium(V) complexes have ability to catalyze the oxidation of prochiral sulﬁdes to chiral sulfoxides. Cat- alytic activity of these complexes were also tested in the oxidation of styrene and cyclohexene.

Kevin S. Boland, David E. Hobart, Stosh A. Kozimor, Molly M. MacInnes and Brian L. Scott

The coordination chemistry of trivalent lanthanides (Ce, Nd, Sm, Eu, Gd, Dy, Yb) with diphenyldithiophosphinate anions

Reported here is the coordination chemistry of a series of lanthanide elements (Ce, Nd, Sm, Eu, Gd, Dy, and Yb) with diphenyldithiophosphinate anions, S2PPh21). The large lanthanides (Ce³⁺, Nd³⁺, Sm³⁺, Eu³⁺) formed eight coordinate anions of the general formula Ln(S2PPh2)41)and were characterized by¹H

and³¹P NMR, IR, UV–Vis, elemental analysis, and single crystal X-ray crystallography. For the slightly smaller Gd³⁺and Dy³⁺ions, a break in reactivity was observed and eight coordinate and neutral Gd(S2PPh2)3(NCMe)2and Dy(S2PPh2)3(NCMe)2com- plexes were isolated. Reactions involving even smaller Yb³⁺ ions provided a new heteroleptic species [Ph4P][Yb(S2PPh2)3Cl], which was isolated in single crystal form. The structural data have been presented in comparison to that of [Ph4P][Sm(S2PMe2)4] and [Ph4P][Eu(S2PMe2)4], which were also structurally characterized for the ﬁrst time.

xx Contents

(18)

Maeve Sullivan,

Agnieszka Folytn-Arfa Kia, Mark Long, Maureen Walsh, Kevin Kavanagh, Siobhán McClean and

Bernadette S. Creaven Polyhedron 67 (2014) 549

Isolation and characterisation of silver(I) complexes of substituted coumarin-4-carboxy- lates which are effective againstPseudomonas aeruginosabioﬁlms

Structure of complexes synthesised in this study which show greater activity against biofilms of P. aeruginosa than against planktonic P. aeruginosa. The complexes which did not contain a phenanthroline adduct showed better activity than those that did.

O O

O OH

R

N N

O O

O Ag O

R

N N

O O

Ag

R

O O

O OAg

R

xH2O (i) AgNO3

NaOH H2O (ii) Phen/EtOH

4d and 4g 4f

AgNO3 NaOH H2O

2a-l 3a-l

The Publisher encourages the submission of articles in electronic form thus saving time and avoiding rekeying errors. For detailed instructions on the preparation of manuscripts and of electronic artwork, consult the Author Gateway for Elsevier at http://authors.elsevier.com

ScienceDirect

Full text of this journal is available, on-line fromScienceDirect. Visitwww.sciencedirect.comfor more information.

xxi Contents