Crystal structures and thermal properties of two transition-metal compounds {[Ni(DNI)2(H2O)3][Ni(DNI)2 (H 2O)4]}•6H2O and Pb(DNI)2(H 2O)4 (DNI = 2,4-Dinitroimidazolate)

Document Type

Article

Publication Date

1-1-2010

Abstract

Two transition-metal compounds derived from 2,4-dinitroimidazole, {[Ni(DNI)2(H2O)3][Ni(DNI)2(H 2O)4]}•6H2O, 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) Å, β = 111.241(2)° and Z = 4; 2: monoclinic, space group C2/c, a = 6.5347(6), b = 17.1727(17), c = 14.1011(14) Å, β = 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.

Keywords

2, 4-Dinitroimidazole, Crystal structure, Lead(II) compound, Nickel(II) compound, Thermal decomposition behavior

Publication Title

Journal of Chemical Crystallography

ISSN

1074-1542

Divisions

CHEMISTRY

Funders

Department of Lab Construction and Administration of Shaanxi Normal University,National Defense Key Laboratory of Propellant and Explosive Combustion of China

Volume

40

Issue

3

Publisher

Springer Verlag

Publisher Location

COMMERCE PLACE, 350 MAIN ST, MALDEN 02148, MA USA

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