Selective reduction of a Pd pincer PCP complex to well-defined Pd(0) species

摘要

Well-defined dimeric or polymeric Pd(0) complexes [Pd(μ-~(iPr)PCHP)l_n (n= 2 or ∞) containing the bridging ligand α,α'-bis(diisopropylphosphino)-m-xylene (~(iPr)PCHP) are produced under mild conditions when the cyclometallated PCP pincer complex (~(iPr)PCP)Pd-OH reacts with methanol or isopropanol. The unique ability of palladium to catalyze a wide range of reactions relies in part in its facile switching between the 0 and +2 oxidation states.