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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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Published in: | Chinese journal of chemistry 2007, Vol.25 (1), p.16-19 |
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Main Author: | |
Format: | Article |
Language: | English |
Subjects: | |
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Online Access: | Get full text |
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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. |
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ISSN: | 1001-604X 1614-7065 |
DOI: | 10.1002/cjoc.200790010 |