CRYSTAL STRUCTURE OF THE POLYMERIC THIO-CYANATE COMPLEXES OF COPPER(I). Vladimir N. Kokozay, Olga A. Babich and Vadim A. Pavlenko, Department of Chemistry, Kiev Shevchenko University, 252033 Kiev, Ukraine

The compounds CuSCN[[infinity]]CH₃CN (1) and [(CH₃)₃NH]⁺[Cu₂(SCN)₃]^- (2) have been synthesized using a direct method of interaction and characterized by X-ray crystallography. The planar Cu₂S₂ units with copper-copper distance 3.095 Å (1) and 2.972 Å (2) form the base of both structures. The coordination polyhedron of copper(I) atoms is slightly distorted tetrahedron. [(CH₃)₃NH]⁺ cations (2) are located in pairs in crystal cavities. The complex (1) consists of the infinite puckered layers. The interlayer distance 6.657 Å corresponds to parameter a of the elementary cell. The three-dimensional polymeric anion [Cu₂(SCN)₃]^- in compound (2) comprises two crystallographically independent copper(I) atoms - [Cu(S2N2)] and [Cu(S3N)] and two bridging thiocyanate groups with different coordinations - -NCS- and -NCS=.

Crystals are monoclinic, for compound (1) P2₁/c, a = 6.657(1), b = 7.388(1), c= 11.357(2) Å, ß = 104.72(1)deg., Z = 4; for compound (2) P2₁/n, a = 5.784(1), b= 30.282(6), c= 7.551(2) Å, ß = 112.46(3)deg., Z = 4.