SYNTHESIS AND CRYSTAL-STRUCTURE OF NIDO-UNDECABORATE]BIS(TRIPHENYLPHOSPHINE)COPPER(I)

The synthesis and crystal structure of [Cu{7,8-mu-(SCH2CH2S)-7,8-C2B9H 10}-(PPh3)2] have been reported. The compound crystallizes in the mono clinic space group P2(1)/c with a = 15.207(3), b = 10.531(3), c = 26.5 92(6) angstrom, beta = 99.29(2)degrees, V = 4203(2) angstrom3, Z = 4, final R = 0.076 (R(w) = 0.051). The sulfur atoms of the carbaborane li gand and the phosphorus atoms of two PPh3 groups are coordinated to th e metal in a highly distorted tetrahedral environment. The bond length s in the coordination sphere are Cu(1)-S(1) = 2.375(3), Cu(1)-S(2) = 2 .483(3), Cu(1)-P(1) = 2.302(3) and Cu(1)-P(2) = 2.303(3) angstrom, and the bond angles vary from 76.1(1) to 124.8(1)degrees.