CHEMISTRY OF SILICON-SULFUR COMPOUNDS .64. CRYSTAL AND MOLECULAR-STRUCTURE OF (TRI-TERT-BUTOXYSILANETHIOLATO)BIS(TRIPHENYL-PHOSPHINE)COPPER(I) (T-C4H9O)3SISCU[P(C6H5)3]2

(Tri-tert-butoxysilanethiolato)bis (triphenylphosphine)copper(I), which was obtained by reaction of triphenylphosphine with [(t-BuO)3SiSCu]4 in benzene, forms colourless plates, with the following crystal data: a=12.772(1), b=18.475(2), c=10.259(1) angstrom, alpha=93.38(1), beta=106.302(7), gamma=90.128(9)-degrees, space group P1BAR and Z=2. The structure was refined to an R (R(w)) value of 0.0382 (0.0280). The crystal consists of monometallic molecules in which the copper atom is three-fold coordinated to one sulfur and two phosphorus atoms in an essentially trigonal planar arrangement. The relevant bond distances and angles are: Cu-P 2.292(1), 2.273(1), Cu-S 2.250(1), S-Si 2.074(1) angstrom; P-Cu-P 123.7(0)-degrees, P-Cu-S 110.2(0), 126.0(0), Cu-S-Si 103.7(1)-degrees.