Syntheses and crystal structures of the copper(i) complexes with quinoline-based monothioetherligands

Abstract

The reactions of three structurally related quinoline-based monothioether ligands, 8-(2-pyridylsulfanylmethyl)quinoline (L¹), 8-(4-pyridylsulfanylmethyl)quinoline (L²) and 5-methyl-2- (8-quinolylmethylsulfanyl)-1,3,4-thiadiazole (L³) with CuI, lead to the formation of three novel complexes: {[Cu₄I₄(L¹)₂](CH₂Cl₂)} (1), [Cu₃I₃L²(CH₃CN)]_n (2) and [Cu₄I₄(L³)₂]_n (3), which have been characterized by elemental analyses, IR spectroscopy, and X-ray crystallography. Single-crystal X-ray analyses show that complex 1 is a tetranuclear structure with a distorted chair-like Cu₄I₄ skeleton, and 2 is a two-dimensional (2-D) network containing merlon-like 1-D double-stranded (CuI)_n chains and CuI₂Cu units, and 3 is a 1-D structure with a double-stranded stair CuI-chain. In 2 and 3, the 1-D (CuI)_n skeletons are also built by chair-like Cu₄I₄ units.