Crystal structures and physico-chemical properties of two new one-dimensional zinc(II) complexes with sulfide bridging bispyridines

Abstract

4,4′-Dipyridyl sulfide ( L 1 ) and 4,4′-di(3-methyl)pyridyl ( L 2 ) sulfide coordination compounds of the general formula Zn( L)(X) 2 ( L 1 =4,4′-dipyridyl sulfide; L 2 =4,4′-di(3-methyl)pyridyl sulfide; X=CH 3COO −, Cl −), have been obtained. The compounds were characterized by single crystal X-ray diffraction, elemental analysis, IR and 1H NMR. Both compounds are of one-dimensional coordination polymers and crystallize in the orthorhombic systems, while in different space groups with Pnc2 for [Zn L 1 (CH 3COO) 2] 1 and Pna2(1) for [Zn L 2 Cl 2] 2, respectively. X-ray analysis and 1H NMR experiments indicate that variation of ligands rather than counter anions, CH 3COO − and Cl −, leads to the change in the modes of the dimensionality array, that is, complexes 1 prefers a linear coordination fashion while complexes 2 exhibits a zigzag conformation.