ELEKTROCHEMIE VON UEBERGANSMETALL-?-KOMPLEXEN. V. ELEKTROCHEMISCHE REDUKTION VON +-KATIONEN

Article abstract of DOI:10.1016/S0022-328X(00)88379-5

Redox potentials for the one electron reduction of cations ⁺ (Cp=η⁵-cyclopentadienyl, L=PR3, P(OR)3 or L2=1,5-cyclooctadiene, norbornadiene, bis(diphenylphosphino)ethane in acetonitrile and dichloromethane (-0.4 to -1.2 V vs.SCE) were determined by cyclic voltammetry (Pt electrode) and polarography at the DME.For complexes with triphenylphosphine and phosphite ligands the reduction is accompanied by chemical follow-up reactions.Cyclovoltammetry gives evidence for a rapid dissociation of electrochemically generated NiCp(P(C6H5)3)2 into triphenylphosphine and a 17-electron fragment NiCpP(C6H5)3.