Cyanide-bridged tetranuclear complexes with T-shaped Pt(CN-M)(3) arrangements

Treatment of the trinuclear complex trans-Pt(CN)(2){CN-Fe(dppe)Cp}(2)] with Cp(dppe)Fe(MeCN)Br or Cp(PPh3)(2)RuCl leads to the tetranuclear complexes [Pt(CN){CN-Fe(dppe)Cp}(3)](SbF6) (3) and [Pt(CN){CN-Fe(dppe)Cp}(2){CN-Ru(PP h3)(2)Cp}](SbF6) (4), containing a T-shaped Pt(CN-Fe)(3) or Pt(CN-Fe)(2)(CN -Ru) skeleton. The electronic communication between the iron and/or rutheni um centers in these complexes was probed by cyclic voltammetry and UV-vis/N IR spectroscopy. Just like in the corresponding trinuclear Pt(CN-M)(2) comp lexes, there is electronic interaction along the linear M-CN chains contain ing trans-configured platinum, but not along the bent chains containing cis -configured platinum. (C) 2000 Elsevier Science S.A. All rights reserved.