Syntheses, crystal structures and luminescent properties of three new halogencuprate(I) complexes with 4-(trimethylammonio)phenyldisulphide

Article abstract of DOI:10.1016/j.molstruc.2005.05.029

Reactions of CuX (X=I, Br) with TabHPF₆ (Tab=4- (trimethylammonio)benzenethiolate) under the existence of Et₃N or Et₄NI in open air gave rise to three novel halogencuprate(I) complexes with 4-(trimethylammonio)phenyldisulphide (Tab-Tab): [Tab-Tab][CuX₃] (1: X=I; 2: X=Br) and {[Tab-Tab][Cu₂I ₄]}_n (3). Compounds 1-3 are characterized by elemental analysis, IR spectra and X-ray crystallography. It was found that the Tab-Tab dication in 1-3 serves as a counterion to maintain the electrical neutrality of 1-3. The dianions of 1 and 2 have planar triangular geometry with each halide atom being bound to the central trigonally coordinated copper atom. The dianion structure of 3 has a unique one-dimensional wavy chain composed of butterfly shaped [Cu₂I₃] units linked by μ-I bridges. The luminescence properties of 1-3 along with [Tab-Tab]I₂ have also been investigated.