Copper(I) complexes containing 1,1'-bis(diphenylphosphino) ferrocene (dppf) as a helate ligand. X-ray crystal structures of [Cu_2(#mu#-Cl)_2(#kappa#~2-P,P-dppf)_2] and [Cu(CN~tBu)_2(#kappa#~2-P,P-dppf)][BF_4]

摘要

Copper(I) complexes [Cu(CNR)_2(#kappa#~2-P,P-dppf)][BF_4] (R = ~tRu (1), 2,6-Me_2C_6H_3 (2), Cy (3), Bz (4) containing the chelating dppf lignad (dppf = 1,1'-bis(diphenylphosphino)ferrocene) have been prepared by reaction of the [Cu(CN~tBu)_2(#kappa#~2-P,P-dppf)_2] with the corresponding isocyanide C(ident to)NR (molar ratio 1:1). Alternatively, complexes 1-4 can also be obtained by the reaction of the acetonitrile complexes [Cu(MeCN)_2(#kappa#~2-P,P-dppf)][BF_4] with 2.5 equivalents of C(ident to)NR in refluxing dichlorometane. The crystal structures of [Cu_2(#mu#-Cl)_2(#kappa#~2-P,P-dppf)] and [Cu_2(CN~tBu)_2(#kappa#~2-P,P-dppf)][BF_4], determined by X-ray diffraction, are also reported.