process for the manufacture of complex by means of electrochemical organometalliques free transition metals co,.

摘要

1315473 Transition metal complexes STUDIENGESELLSCHAFT KOHLE mbH 19 April 1971 [17 Feb 1970] 21484/71 Heading C2J [Also in Division C7] Organo-metallic complex compounds of transition metals of Groups IV to VIII of the Periodic System, which do not contain CO as a ligand are formed by electrolysis of a solution comprising an organic solvent, a compound of the transition metal and complexing agent. The transition metal compound used may be an acetylacetonate, an organic acid salt or a alkanolate; the complexing agent may be a cyclic olefin, an alkyne, or an alkyl or aryl compound of a group 5A element, e.g. a tertiary phosphine, phosphite, arsine or stibine; and the solvent may be an aromatic hydrocarbon, an aliphatic ether, propylene carbonate or pyridine. The bath may also contain a conducting salt, e.g. an ammonium salt, a tetraalkylammonium halide or a lithium halide. The anode used may be of the transition metal whose complex is to be formed, and the cathode may be of Al, Hg, Pb, Sn, graphite, Fe, Pt, Ni or Ti. The process may be used in production of tetrakis-[triphenyl( phosphite or phosphine)] Ni; cyclododecatrieno nickel compounds, e.g. cyclododecatriene Ni triphenyl phosphine; cyclooctadiene compounds of Ni or Co; and cyclooctatetraene compounds of Fe, Cr, Mo, W, Zr, Mn, V or Ti. The complexes formed may be used as catalysts in chemical reactions, the reactants for which may be introduced into the electrolysis bath; e.g. butadiene may be transformed to methylheptatriene or diphenylacetylene to hexaphenylbenzene.