Abstract
Reactions of the ligand 2-mercapto-1-cyclohexylimidazole (Hmim(chexyl)) with both zinc(II) and cadmium(II) bromides in ethanol solutions afforded 2:1 complexes of the type [M(Hmim(chexyl))(2)(Br)(2)] (M = Zn 1, and Cd 2) with an MBr2S2 configurations. Spectroscopic evidence (FT-IR and H-1-C-13 NMR) confirms that the exocyclic thione sulfur atoms are the donors in both complexes. Complex 1 crystallizes in a monoclinic system, space group C2/c, a = 16.180(3), b = 10.817(5), c = 13.602(3); alpha = 90, beta = 106.754(17), gamma = 90; Z = 4; R1 = 0.0229, wR2 = 0.0554. The coordination geometry about the zinc(II) atom is distorted tetrahedral with average Zn-S and Zn-Br bond lengths of 3.3418(8) and 2.4017(6) angstrom, respectively. The bromide ions form intermolecular N-H center dot center dot center dot Br hydrogen bonding with the thione NH groups of the ligand molecule.