Two novel N,N 0 -dialkylimidazolium thiocyanate-cadmium complexes [(R 2 Im) 2 ][Cd 2 (SCN) 6 ] for R=Me (3), and cyclohexyl (4) have been synthesized and characterized by single-crystal X-ray diffraction. Compound 3 crystallizes in the monoclinic unit cell dimensions of 17.468(3), 7.7273(12), 10.6750(16) ( A, 104.833(2)1, and space group C2 with two [(Me 2 Im) 2 ] [Cd 2 (SCN) 6 ] per unit cell. The two cadmium atoms in 3 are octahedrally coordinated in 4N2S and 2N4S coordination environment, and linking into one-dimensional zigzag chains. Compound 4 belongs to the monoclinic space group Cc with unit cell of dimensions 13.3049(12), 17.5550(16), 20.8012(19) ( A, 101.494(2)1, and four [(Cy 2 Im) 2 ][Cd 2 (SCN) 6 ] . C 3 H 6 O per unit cell.
The cadmium atoms in 4 are all 3N3S hexa-coordinated with six bridging SCN À ions in an fac configuration and form infinite zigzag polymeric chains. The infinite chains in 3 form an approximate hexagonal array, making triangular channels which are occupied by N,N 0 -dimethylimidazolium ions, whereas the chains in 4 form layered structure, and the layers are stacked perpendicularly with respect to the orientation of the infinite anionic chains alternatively. N,N 0 -dicyclohexylimidazolium cations and solvent molecules fill in between layers. # 2002 Elsevier Science (USA)