PHOTOCHEMICAL-REACTIONS OF PALLADIUM(0) AND PLATINUM(0) PHOSPHINE COMPLEXES

Photochemical reactions of the binuclear palladium(0) complex [Pd-2(dp pm)(3)] with organic halides yield palladium(I) dihalogeno complexes w ith irradiation of visible light. Photooxidation of alcohols was obser ved for ethanol and 2-propanol with the palladium complex. Photophysic al and quenching properties of a chiral [Pt(BINAP)(2)] complex (BINAP = RR- or SS-2,2'-bis(diphenylphosphino)-1,1'-binaphthyl) were studied. The emitting MLCT excited state has a long lifetime. Photochemical re actions of [Pt(BINAP)(2)] with organic halides cause halogen abstracti on. Atom and electron transfer may be candidates for the initial stage of the photoreaction. The mechanism of the photoreaction is discussed with the quenching data. (C) 1998 Elsevier Science S.A.