Syntheses, structural characterization and thermoanalysis of transition-metal compounds derived from 3,5-dinitropyridone

Fan, R. and Zhou, Q.P. and Zhang, G.F. and Cai, M.Y. and Li, P. and Gan, L.H. and Zhao, F.Q. and Li, J.Z. and Fan, X.Z. and Ng, S.W. (2010) Syntheses, structural characterization and thermoanalysis of transition-metal compounds derived from 3,5-dinitropyridone. Journal of Chemical Crystallography, 40 (3). pp. 266-271.

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Abstract

Nine metal compounds of Mn(II), Zn(II) and Cd(II) derived from dinitropyridone ligands (3,5-dinitropyrid-2-one, 2HDNP; 3,5-dinitropyrid-4-one, 4HDNP and 3,5-dinitropyrid-4-one-N-hydroxide, 4HDNPO) were characterized by elemental analysis, FT-IR and partly by TG-DSC. Three of which were further structurally characterized by X-ray single-crystal diffraction analysis. The structures of the three compounds, Mn(4DNP)(2)(H(2)O)(4), 4, Zn(4DNPO)(2)(H(2)O)(4), 8, and Cd(4DNPO)(2)(H(2)O)(4), 9, crystallize in the monoclinic space group P2(1)/n and Z = 2, with a = 8.9281(9), b = 9.1053(9), c = 10.6881(11) angstrom, beta = 97.9840(10)degrees for 4; a = 8.4154(7), b = 9.9806(8), c = 10.5695(8) angstrom, beta = 97.3500(10)degrees for 8; a = 8.5072(7), b = 10.2254(8), c = 10.5075(8) angstrom, beta = 96.6500(10)degrees for 9. All three complexes are octahedral consisting of four equatorial water molecules, and two nitrogen or oxygen donor ligands (DNP or DNPO). The abundant hydrogenbonding and pi-pi stacking interactions seem to contribute to stabilization of the crystal structures of the compounds. The TG-DTG results revealed that the complexes showed a weight loss sequence corresponding to all coordinated water molecules, nitro groups, the breaking of the pyridine rings and finally the formation of metal oxides.

Item Type: Article
Uncontrolled Keywords: Dinitropyridone; Transition-metal compound; Structural characterization; Thermoanalysis
Subjects: Q Science > QC Physics
Depositing User: MR Faizal II H
Date Deposited: 22 Dec 2015 00:40
Last Modified: 22 Dec 2015 00:40
URI: http://eprints.um.edu.my/id/eprint/15144

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