Lewis-Base Adducts of Group 11 Metal(I) Compounds. LVI. Structural Characterization of μ,μ′-Dibromo-bis[(acetonitrile)(diphenyl-o-tolyl-phosphine)copper( I)] Bis(acetonitrile)

Abstract

The title compound, [((2-MeC₆H₄)Ph₂P)( MeCN )CuBr₂Cu( MeCN )(PPh₂-MeCH)]₂MeCN has been isolated in the course of recrystallization of a 1 : 1 stoichiometric ratio of copper(]) bromide and the phosphine ligand from acetonitrile and characterized by a single-crystal X-ray structure determination. Crystals are triclinic, PI, a 13.148(2), b 10.673(2), c 8.101(1) Å , α 84.24(4), β 89.42(4), γ 82.02(2)°, Z= 1 dimer ; R was 0.050 for 1772 independent 'observed' reflections. The dimer is centrosymmetric and is the first 1 : 1 : 1 mixed base copper(1) halide : phosphine : nitrile adduct to be so isolated and so characterized.