Synthesis and structural characterization of copper(I) halide complexes containing bis(azol-1-yl) methane derived bisphosphines

The copper(I) complexes containing bisphosphines such as bis(2-diphenylphosphinoimidazol-1-yl) methane (1), bis(5-diphenylphosphinopyrazol-1-yl) methane (2) and bis(5-diphenylphosphino-1,2,4-triazol- 1-yl) methane (3) have been synthesized. The reaction of 1 with CuX (X = Cl, I) afforded homoleptic dinuclear complexes [Cu-2(mu-X)(2){CH2(1,3-C3H2N2PPh2)(2)}(2)-kappa P-2,P] (X = Cl, 4; I, 6). However, a mononuclear complex [CuBr(CH3CN){CH2(1,3-C3H2N2PPh2)(2)}-kappa P-2,P] (5) was isolated in the reaction of 1 with CuBr. The reaction of 2 with CuX (X = Cl, Br, I) also produced dinuclear complexes [Cu-2(mu-X)(2){CH2(1,2-C3H2N2PPh2)(2)}(2)-kappa P-2,P] (X = Cl, 7; Br, 8; I, 9). The reaction of 3 with CuCl yielded a novel 1D coordination polymer [Cu-2(mu-Cl)(2){CH2(1,2,4-C2HN3PPh2)(2)}-kappa P-2,N](n) (10), whereas homoleptic dinuclear complexes [Cu-2(mu-X)(2){CH2(1,2,4-C2HN3PPh2)(2)}(2)-kappa P-2,P] (X = Br, 11; I, 12) were obtained in the reactions of 3 with CuX (X = Br, I). Bisphosphines 1 and 2 showed bidentate (kappa P-2,P) chelating mode of coordination, whereas 3 has adopted bidentate (kappa P-2,N) chelating mode of coordination in 10. The crystal structures of 4-7 and 10-12 have been established by single crystal X-ray crystallography. (C) 2016 Elsevier B.V. All rights reserved