XXIV. International Conference on Coordination and Bioinorganic Chemistry, Smolenice, 2 – 7 June, 2013 Recent Developments in Coordination, Bioinorganic and Applied Inorganic Chemistry – Book of Abstracts Press of Slovak University of Technology, Bratislava © 2013
METAL ION BINDING OF SOME MULTIDENTATE TRIPODAL LIGANDS
F. Matyuska, Á. Dancs, A. Szorcsik, and T. Gajda
Department of Inorganic and Analytical Chemistry, University of Szeged, 6721 Dóm tér 7, Szeged, Hungary
ABSTRACT
The coordination chemistry of simple tripodal ligands (e.g. tris(2-pyridilyl)amine, cis,cis-1,3,5-triaminocyclohexane) is now well established. By derivatization of these trigonal platforms it is possible to alter and optimize the steric properties for controlled reactivity at the metal centres, i.e. to create metal complexes for small molecule activation used in biomimetic chemistry. The fine tuning of the properties and reactivity of the metal centres can be obtained in different levels, even with relatively simple multidentate tripodal ligands:
H N N H
H N N
N N
N N H
H N H N
N N
N
H N H N N H N H
N N
H N H N
N
L1 L2 L3 L4
L1 and L2 provide 3N and 4N metal binding sites, with different coordination geometry, with different number and acidity of coordinated water molecules, but with similar binding pockets created by the pyridine rings. L3 may provide the formation of oligonuclear complexes, while the allosteric 6N metal binding in L4 may create a further 3N catalytic site. The lecture will discuss the coordination properties of these ligands.