Synthesis of organopalladium(IV) complexes by halogen exchange, and the structure of the azidopalladium(II) complex formed on reductive elimination of ethane from Pd(N) 3Me 2(CH 2Ph)(bpy)

Abstract

A new route to organopalladium(IV) complexes is described, involving replacement of bromine in the 2,2′-bipyridyl complex PdBrMe 2(CH 2Ph)(by), by other halogen or pseudohalogen groups. 1H NMR studies of the decomposition of PDXMe 2(CH 2Ph)(bpy) in warm (CD 3) 2CO indicate that a selectivity in reductive elimination of alkanes occurs. to give ethane (X = Br, N 3, NCS), or a mixture of ethane and ethylbenzene in ca. 9/1 ratio (X = F. Cl, I). The reductive elimination product azido(2,2′-bipyridyl)benzylpalladium(II) has been characterized by X-ray crystallography.