Tetrapodal pentadentate ligands: Single site reactivity and bond activation in iron(II) complexes.
Tetrapodal pentadentate ligands occupy five coordination positions in a coordination octahedron, thereby providing the metal ion with a square-pyramidal "coordination cap": In such complexes, all reactivity is focused on a single coordination site. The review highlights recent advances in the coordination chemistry of iron. With a variety of NN(4) ligands, the concept is being used to model non-heme active sites in biomolecules. Tetraphosphane ligands (donor set: NP(4)) undergo, depending on the solvent, remarkably specific P-C bond activation reactions, which may be reversed under suitable conditions.
Grohmann
Andreas
A
Institut für Chemie, Technische Universität Berlin, Strasse des 17. Juni 135, D-10623, Berlin, Germany. andreas.grohmann@chem.tu-berlin.de