Transition-metal complexes

Abstract

1,182,932. Transition metal complexes. IMPERIAL CHEMICAL INDUSTRIES Ltd. 5 April, 1968 [17 April, 1967], No. 17527/67. Headings C2C and C2J. [Also in Divisions C1 and C5] Polynuclear (i.e. containing 2 or more transition metal atoms per molecule) bridged transition metal complexes in which the metals may all be the same or may be different are prepared by contacting a first transition metal complex which contains 1 or more hydrocarbon ligands with a second transition metal complex which contains 1 or more ligands which contain or consist of a hydrogen atom or atoms, capable of reacting with the hydrocarbon ligand of the first complex to liberate a free hydrocarbon and form the polynuclear product. Products formed from the following starting materials are claimed per se. Ex. (1) it-allyl palladium chloride dimer and diphenylphosphine-chromium pentacarbonyl (propylene evolved), (3) #-allyl palladium chloride dimer and diphenylphosphine iron tetracarbonyl (propylene evolved), (10) #-allyl manganese tetracarbonyl and diphenylphosphine iron tetracarbonyl, (11) #-allyl cobalt tricarbonyl and diphenylphosphine iron tetracarbonyl, (12) #-cyclopentadienyltriphenylphosphine nickel methyl and diphenylphosphine iron tetracarbonyl (methane evolved), (13) Diphenylphosphine tungstenpentacarbonyl and #-allyl palladium chloride dimer (propylene evolved), (14) Diphenyl phosphine molybdenum pentacarbonyl and #-allyl palladium chloride dimer. Products formed from the following starting materials are also exemplified. Ex. (2) Ethyleneplatinum chloride dimer and diphenylphosphine iron tetracarbonyl, (4) Cyclo-octadiene palladium chloride and diphenylphosphine iron tetracarbonyl, (5) Dimeric diallylchlororhodium and diphenylphosphine iron tetracarbonyl (propylene and biallyl evolved), (8) #- cyclopentadienyltriphenyl - phosphinenickel methyl and hydridomanganese pentacarbonyl (methane evolved), (9) #-allylmolybdenum dicarbonylbipyridyl chloride and hydridomanganese pentacarbonyl (propylene evolved). The complexes are useful as hydrogenation catalysts.