Amido-bridged dinuclear rhodium(I) complexes by deprotonation of mononuclear rhodium(I) amine complexes
de Bruin B, Peters TPJ, Suos NNFA, de Gelder R, Smits JMM, Gal AW
INORGANICA CHIMICA ACTA 337: 154-162 SEP 26 2002

Abstract:
The preparation of a series of new amido bridged binuclear complexes [(N-N-N)Rh-2(1) (cod)(2)] (cod = Z,Z- 1,5-cyclooctadiene), [(N-N-N)Rh-2(1) (hed)(2)] (hed = 1,5-hexadiene) and [(N-N-N)Rh-2(1) (CO)(4)] is reported. These complexes contain chelating imidazoleamido-imidazole, pyridine-amido-pyridine and pyridine-amido-pyrrolate ligands (N-N-N). The cod complexes have been prepared through deprotonation of their mononuclear amine precursors [(N-HN-N)Rh-1(cod)] in the presence of [Rh-1(cod)](+). Reaction of the binuclear complexes [(N-N-N)Rh-2(1) (cod)(2)] with CO results in the complexes [(N-N-N)Rh-2(1) (CO)(4)]. For N-N-N= chelating imidazole-amido-imidazole ligand, the X-ray structures of [(N-N-N)Rh-2(1)(cod)(2)], [(N-N-N)Rh-2(1)(CO)(4)], and their mononuclear amine precursor [(N-HN-N)Rh-1(cod)] are reported. Electrochemical oxidation of the complexes is related to the relative donor strength of the N-ligands.