Synthesis and structural analysis of the cystal trans-diaquatetrakis (Imidazole) Nickel(ii) dibromide

The crystal structure of the title compound, (C12 H16 N8 Ni O2, 2(Br) is shown below. The cation Ni(II) ion sits on an inversion centre and is octahedrally coordinated by four imidazole rings. The compound contains a six-coordinate Ni(II) ion lying on an Inversion center, which is bonded to four imidazole N atoms and two O atoms. Intermolecular hydrogen-bonding interactions are present, linking the nickel complex cations and bromide anions in the crystal structure. A two-dimensional perpendicular network is formed via N2-Br1, N4-Br1 intermolecular hydrogen bonds. The imidazole ring systems are inclined to one another with dihedral angles varying between 81.2 (4) and 170.9 (4). In the crystal, molecules are linked via N-H-Br hydrogen bonds involving one Ni(II)cation and the Oxygen atom in the equatorial plane, forming an inversiondimer-like arrangement.