Syntheses and crystal structures of the copper(I) complexes with quinoline-based monothioether ligands

The reactions of three structurally related quinoline-based monothioether ligands, 8-( 2pyridylsulfanylmethyl) quinoline (L-1), 8-(4-pyridylsulfanylmethyl) quinoline (L-2) and 5- methyl-2- (8-quinolylmethylsulfanyl)- 1,3,4- thiadiazole (L-3) with CuI, lead to the formation of three novel complexes: {[Cu4I4(L-1)(2)](CH2Cl2)} (1), [Cu3I3L2(CH3CN)](n) (2) and [Cu4I4(L-3)(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.