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)2RuCl leads to the tetranuclear complexes [Pt(CN){CNFe(dppe)Cp}3](SbF6) (3) and [Pt(CN){CNFe(dppe)Cp}2{CNRu(PPh3)2Cp}](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 ruthenium centers in these complexes was probed by cyclic voltammetry and UV–vis/NIR spectroscopy. Just like in the corresponding trinuclear Pt(CNM)2 complexes, there is electronic interaction along the linear MCN chains containing trans-configured platinum, but not along the bent chains containing cis-configured platinum.