Crystal Structures and Thermal Properties of Two Transition-Metal Compounds {[Ni(DNI)(2)(H2O)(3)][Ni(DNI)(2) (H2O)(4)]}center dot 6H(2)O and Pb(DNI)(2)(H2O)(4) (DNI=2,4-Dinitroimidazolate)

Zhang, G.F. and Cai, M.Y. and Jing, P. and He, C. and Li, P. and Zhao, F.Q. and Li, J.Z. and Fan, X.Z. and Ng, S.W. (2010) Crystal Structures and Thermal Properties of Two Transition-Metal Compounds {[Ni(DNI)(2)(H2O)(3)][Ni(DNI)(2) (H2O)(4)]}center dot 6H(2)O and Pb(DNI)(2)(H2O)(4) (DNI=2,4-Dinitroimidazolate). Journal of Chemical Crystallography, 40 (3). pp. 278-282.

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Abstract

Two transition-metal compounds derived from 2,4-dinitroimidazole, {[Ni(DNI)(2)(H2O)(3)][Ni(DNI)(2)(H2O)(4)]}center dot 6H(2)O, 1, and Pb(DNI)(2)(H2O)(4), 2, were characterized by elemental analysis, FT-IR, TG-DSC and X-ray single-crystal diffraction analysis. Crystal data for 1: monoclinic, space group C2/c, a = 26.826(3), b = 7.7199(10), c = 18.579(2) angstrom, b = 111.241(2)degrees and Z = 4; 2: monoclinic, space group C2/c, a = 6.5347(6), b = 17.1727(17), c = 14.1011(14) angstrom, beta = 97.7248(10) and Z = 4. Compound 1 contains two isolated nickel centers in its structure, one being six-coordinate and another five-coordinate. The structure of 2 contains a lead (II) center surrounded by two chelating DNI ligands and four water molecules in distorted square-antiprism geometry. The abundant hydrogen bonds in two compounds link the molecules into three-dimensional network and stabilize the molecules. The TG-DSC analysis reveals that the first step is the loss of water molecules and the final residue is the corresponding metal oxides and carbon.

Item Type: Article
Uncontrolled Keywords: 2,4-Dinitroimidazole; Nickel(II) compound; Lead(II) compound; Crystal structure; Thermal decomposition behavior
Subjects: Q Science > QC Physics
Depositing User: MR Faizal II H
Date Deposited: 22 Dec 2015 00:39
Last Modified: 22 Dec 2015 00:39
URI: http://eprints.um.edu.my/id/eprint/15145

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