Electroanalytical and Spectrophotometric Investigations on the Metal(II)-1,2-Bis(diphenylphosphino)ethane-Acetylacetonate System (M = Ni, Pd, or Cu) in Acetonitrile

Article abstract of DOI:10.1039/DT9880001425

The soft-hard mixed-ligand complexes ⁺ have been characterized by a combination of electroanalytical and spectrophotometric measurements.These species can easily be synthesized in acetonitrile both by a ligand conproportionation reaction upon starting from the corresponding acetylacetonate and diphosphine homoleptic species and from stoicheiometric amounts of ²⁺ and acac^-.Upon reaction of equimolar amounts of and dppe, the same synthesis can be achieved in the case of M = Pd, while for M = Ni the ligand-exchange reaction is followed by the reduction of nickel(II) to nickel(I) and nickel(0) occuring at the expense of the displaced acac^-.The mixed-ligand complex cannot ne obtained for Cu in that copper(II) is reduced to copper(I) when dppe is present.In this low oxidation state copper is unable to co-ordinate acac^- and appears to be stable as ⁺ or ⁺.

Full text of DOI:10.1039/DT9880001425

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