Two isomorphous imidazole (Him) complexes: [MCl2(Him)(2)(H2O)(2)] (M = Co and Ni)

Abstract

The structures of aquadichlorobis(1H-imidazole) cobalt(II), [CoCl2(Him)(2)(H2O)(2)] (Him is 1H-imidazole, C3H4N2), (I), and aquadichlorobis(1H-imidazole) nickel(II), [NiCl2( Him)(2)( H2O)(2)], ( II), are isomorphous and consist of monomers with inversion symmetry. The three monodentate ligands ( imidazole, chlorine and aqua), together with their symmetry equivalents, define almost perfect octahedra. Hydrogen-bonding interactions via the imidazole and aqua H atoms lead to a three-dimensional network.