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Crystal Structure, Thermal Decomposition Behavior and the Standard Molar Enthalpy of Formation of a Novel 3D Hydrogen- Bonded Supramolecular [Co(HnicO)2·(H2O)2]

Hydrothermal synthesis and X-ray characterized 3D supramolecular networks were constructed by [Co(HnicO)2·(H2O)2] (HnicOH=2-hydroxynicofinic acid) (1) as building block via abundant dimeric homomeric (N--H…O) and unusually cyclic tetrameric heteromeric (O-H…O) hydrogen-bonds. It is noted that there...

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Bibliographic Details
Published in:Chinese journal of chemistry 2007, Vol.25 (1), p.16-19
Main Author: 曾明华 吴美春 朱立红 梁宏 杨旭武
Format: Article
Language:English
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Summary:Hydrothermal synthesis and X-ray characterized 3D supramolecular networks were constructed by [Co(HnicO)2·(H2O)2] (HnicOH=2-hydroxynicofinic acid) (1) as building block via abundant dimeric homomeric (N--H…O) and unusually cyclic tetrameric heteromeric (O-H…O) hydrogen-bonds. It is noted that there exist unusually linear metal-water chains comprised of tetrameric units linked by vertexes sharing cobalt centers through hydrogen-bonding. TG-DTG curves illustrated that thermal decomposition was completed by two steps, one is the loss of two terminal water molecules in the range of 156--234℃, and the other is the pyrolysis of HnicO ligand in the range of 234--730 ℃. The standard molar enthalpy of formation of the complex was determined to be (-1845.43± 2.77) kJ·mol^-1 by a rotary-bomb combustion calorimeter.
ISSN:1001-604X
1614-7065
DOI:10.1002/cjoc.200790010