The influence of substituents (R) at N1 atom of furan-2-carbaldehyde thiosemicarbazones {(C4H3O)HC2N3–N(H)–C1(S)N1HR} on bonding, nuclearity, H-bonded networks of copper(I) complexes
作者:Tarlok S. Lobana、Rekha Sharma、Geeta Hundal、A. Castineiras、Ray Jay Butcher
DOI:10.1016/j.poly.2012.08.014
日期:2012.10
The chemistry of copper(I) halides (CuX) with furan-2-carbaldehyde-N-1-substituted thiosemicarbazones (C4H3O)HC2=(NNH)-N-3-H-2-C-1(=S)(NHR)-H-1, Hftsc-(NHR)-H-1) in presence of triphenyl phopshine is described. For methyl and ethyl substituents (R) at N-1 atom, and with X = I, Br, Cl, the halogen-bridged dimers, namely, [Cu-2(mu-X)(2)(eta(1)-S-Hftsc-(NHR)-H-1)(2)(PPh3)(2)] (R, X: Me, I, 1, Br 2, Cl 3; Et, I 4, Br 5, Cl 6) have been obtained. However, the presence of phenyl substituent at N-1 has favored a three coordinate complex, [Cul(eta(1)-S-Hftsc-(NHPh)-H-1)(2)] 7, and with copper(I) bromide/and chloride, it has formed sulfur-bridged dimers, [Cu2X2(-eta(1)-Hftsc-(NHPh)-H-1)(2)(mu-S-Hftsc-(NHPh)-H-1)(2)] (X = Br 8, Cl 9). In the latter three complexes (7-9), the Ph3P ligand did not take part in coordination. All these complexes have been characterized with the help of elemental analysis, IR, H-1 NMR spectroscopy and X-ray crystallography (1-3, 5, 7 and 9). The bonding and nuclearity of complexes has been found to vary with the substituents at N-1 atom. The intermolecular interactions have formed one dimensional (1,9) and two dimensional (2, 3 and 5) networks. (C) 2012 Elsevier Ltd. All rights reserved.