Copper(I) Chloride Complexes of 1,2-Bis(disubstituted phosphino)-1,2-dicarba-closo-dodecaboranes and Crystal Structure of Chloro-[1,2-bis(diethoxyphosphino)-1,2-dicarba-closo-dodecaborane]triphenylphosphinecopper(I).

Three copper(I) chloride complexes of 1,2-bis(disubstituted phosphino)-1,2-dicarba-closo-dodecaboranes, viz. [CuCl{1,2-[P(OEt)(2)](2)-1,2-C2B10H10}(PPh(3))], [CuCl{1,2-[P(Et)(2)](2)-1,2-C2B10H10}(PPh(3))] and [CuCl{1,2-[P(Pr-i)(2)](2)-1,2-C2B10H10}], were synthesised, and the crystal structure of the first was determined. [CuCl{1,2-[P(OEt)(2)](2)-1,2-C2B10H10}(PPh(3))] crystallizes in the monoclinic system, space group P2(1)/c, with a=18.597(3), b=10.897(6), c=20.677(5) Angstrom, beta=112.91(2)degrees, Z=4, R=0.051, wR=0.060. The structure consists of discrete molecules. The copper(I) atom is coordinated in distorted tetrahedral arrangement to two phosphorus atoms attached to the carborane cage, the phosphorus atom of PPh(3) and one chloride ion.