Copper(I) iodide ribbons coordinated with thiourea derivatives

Two products of the reactions of CuI with 1-benzoyl-3-(4-bromophenyl) thiourea and with 1-benzoyl-3-(2-iodophenyl) thiourea have been obtained and characterized, namely poly[[[1-benzoyl-3-(4-bromophenyl) thiourea-kappa S]-mu(3)-iodidocopper( I)] acetone hemisolvate], {[CuI(C14H11BrN2OS)]center dot 0.5C(3)H(6)O}(n), and poly-[mu(4)-iodido-mu(3)-iodido-[N-(benzo[d] thiazol-2-yl) benzamide-kappa N] dicopper(I)], [Cu-2-I-2( C14H10N2OS)](n). Their structures, determined by single-crystal X-ray diffraction analysis, exhibit different stoichiometries and molecular organizations; however, both compounds are polymeric and possess close Cu center dot center dot center dot Cu contacts. The first product contains a (CuI)(n) double chain supported by the thiourea derivative coordinated via the S atom. In the second case, the ligand undergoes dehalogenation and cyclization to form N-(benzo[d]thiazol-2-yl) benzamide that serves as the N-donor ligand which is connected to both sides of a (CuI)(n) quadruple chain. In both hybrid inorganic chains, I atoms bridge three or four Cu atoms. The coordination centres adopt more or less distorted tetrahedral geometries. The structures of the (CuI) n kernels of the ribbons are similar to fragments of the layers in high-pressure phase V copper(I) iodide. Only weak S center dot center dot center dot O, C-H center dot center dot center dot O, C-H center dot center dot center dot I and pi-pi interactions hold the ribbons together, allowing the formation of crystals.