Synthesis, crystal structure and spectral analysis of diaquatetrakis(N-methylimidazole)Ni(II)(2,4,6-tribromophenol) by A. Yilmaz, P. Camurlu, L. Tatar Yildirim, D. Kisakürek, and D. Ülkü

Crystal Research and Technology

Cryst. Res. Technol. 41, 829 (2006) - Abstract -

Synthesis, crystal structure and spectral analysis of diaquatetrakis(N-methylimidazole)Ni(II)(2,4,6-tribromophenol)

A. Yilmaz, P. Camurlu, L. Tatar Yildirim*, D. Kisakürek, and D. Ülkü*

Middle East Technical University, Department of Chemistry, Ankara, 06531, Turkey
*Hacettepe University, Department of Engineering Physics, Beytepe 06800, Ankara, Turkey

Keywords	crystal structure, N-methyl imidazole, 2,4,6-tribromophenolate, Ni(II) complex
PACS	61.66.Hq
DOI	10.1002/crat.200510678

Diaquatetrakis(N-methylimidazole)Ni(II)(2,4,6-tribromophenol), Ni(H₂O)₂(C₃N₂(CH₃))₂.2(C₆H₃Br₃O), was synthesized via reaction of nickel sulphate and 2,4,6-tribromophenolate in aqueous media in the presence of N-methyl imidazole and sodium hydroxide. The complex crystalizes in the triclinic space group P-1 with one formula unit of Ni(C₃H₃N₂(CH₃))₄(H₂O)₂.2(C₆H₃Br₃O) in the cell. The coordination around the Ni(II) ion is a slightly distorted octahedron, involving four N atoms from four different di(N-methyl imidazole) ligand in the basal plane. The two oxygen atoms of the water molecules located at the apical positions result in an octahedral coordination. The two tribomophenol groups in the unit cell are connected via hydrogen-bonds to the atoms of the coordination sphere, to build one dimensional chains along the a-axis. For characterization of complex FTIR, UV spectroscopy, DSC and TGA thermal analysis were performed.

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