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
Divisions
CHEMISTRY
Funders
Department of Lab Construction and Administration of Shaanxi Normal University,National Defense Key Laboratory of Propellant and Explosive Combustion of China
Publication Title
Journal of Chemical Crystallography
Volume
40
Issue
3
Publisher
Springer Verlag
Publisher Location
COMMERCE PLACE, 350 MAIN ST, MALDEN 02148, MA USA