Structure of Hexakis (imidazole) nickel (II) Nitrate Water Solvate: [Ni(Im)6](NO3)2-4H2O
Abstract
Crystal structure of the title compound, [Ni(Im)6] (NO3)2·4H2O (Im = imidazole), was determined by X-ray crystallographic analysis. The crystal structure consists of discrete Ni(Im)26+ cation, NO−3 anion and four uncoordinated water molecules. It crystallizes in the hexagonal system, space group P63, with lattice parameters a = b = 0.9003(2) nm, c = 2.1034(4) nm, and Z = 2. The Ni(II) ion is centro- symmetric octahedron geometry with the NiN6 core. Six imidazole molecules are coordinated to each nickel (II) atom through its tertiary nitrogen atom. The short and long bond distances of Ni-N are 0.2059(6) and 0.2204(7) nm, respectively. In the solid state, [Ni(Im)6]2+, H2O moieties and nitrate anions form the three dimensional hydrogen bonds network which stabitizes the crystal structure.
