Syntheses,Structural Characterization and Thermoanalysis of Transition-Metal Compounds Derived from 3,5-Dinitropyridone |
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| Authors: | Rong Fan Qiu-Ping Zhou Guo-Fang Zhang Mei-Yu Cai Ping Li Li-Hua Gan Feng-Qi Zhao Ji-Zhen Li Xue-Zhong Fan Seik Weng Ng |
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| Institution: | (1) Department of Chemistry, Tongji University, 200092 Shanghai, People’s Republic of China;(2) Key Laboratory of Applied Surface and Colloid Chemistry, Shaanxi Normal University, Ministry of Education, 710062 Xi’an, People’s Republic of China;(3) School of Chemistry & Materials Science, Shaanxi Normal University, 710062 Xi’an, People’s Republic of China;(4) Xi’an Mordern Chemistry Research Institute, 710065 Xi’an, People’s Republic of China;(5) Department of Chemistry, University of Malaya, 50603 Kuala Lumpur, Malaysia; |
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| Abstract: | 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(H2O)4, 4, Zn(4DNPO)2(H2O)4, 8, and Cd(4DNPO)2(H2O)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) Å, β = 97.9840(10)° for 4; a = 8.4154(7), b = 9.9806(8), c = 10.5695(8) Å, β = 97.3500(10)° for 8; a = 8.5072(7), b = 10.2254(8), c = 10.5075(8) Å, β = 96.6500(10)° 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 hydrogen-bonding and π-π 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. |
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