Electron Transfer in trans-[Pt(PPh3)2(-C­=C-Fc)2] and Related Compounds

The electrochemical behaviour of the title complex shows two reversible 1e oxidations centred on the ferrocenyl moieties, indicating a moderate electronic communication between such redox units through the organic chain and the Pt hinge. Moreover, two irreversible 1e reductions are detected, and assigned to the stepwise Pt^II → Pt^o process. The transient Pt^I intermediate is somewhat stabilized by the electronic delocalization over the external ferrocenyl units. The assignment of the redox processes is carried out by comparison of the electrochemical behaviour of several model complexes, which represent the building blocks of the overall molecule.