Coupling of Electron Transfer and Bond Dissociation Processes in Dinuclear Complexes with Rhodium and Iridium Reaction Centers Bridged by 2,2'-Bipyrimidine

0181205 - UFCH-W 20010120 RIV CZ eng J - Journal Article
Kaim, W. - Reinhardt, R. - Greulich, S. - Sieger, M. - Klein, A. - Fiedler, Jan
Coupling of Electron Transfer and Bond Dissociation Processes in Dinuclear Complexes with Rhodium and Iridium Reaction Centers Bridged by 2,2'-Bipyrimidine.
Collection of Czechoslovak Chemical Communications. Roč. 66, č. 2 (2001), s. 291-306. ISSN 0010-0765
R&D Projects: GA MŠMT OC D15.10
Institutional research plan: CEZ:AV0Z4040901
Keywords : EPR spectroscopy * iridium complexes * rhodium complexes
Subject RIV: CG - Electrochemistry
Impact factor: 0.778, year: 2001

Cyclic voltammetry and spectroscopy (NMR, EPR, UV-Vis) was used to analyze reduction of the complexes [{M(C5Me5)}2(bpym)](PF6)2 with up to five electrons. In acetonitrile at room temperature, the dirhodium compound displays two sequential chloride-dissociative two-electroncathodic steps. At -15řC in DMF, the diiridium compound was found to be sufficiently inert towards dissociation; it is then reversibly reduced to an EPR-detactable radical cation [{IrCl(C5Me5)}2(bpym)]+.
Permanent Link: http://hdl.handle.net/11104/0077791