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Abstract
The complex catena-poly[bis(benzoato-O)-bis(3-pyridinemethanol-N,O)-zinc(II)], [Zn(benz)2(3-pymeth)2] n was prepared and characterised by elemental analysis, IR spectroscopy, thermal analysis and an X-ray structure determination. Zinc is octahedrally coordinated. Two coordination sites are occupied by oxygen atoms of two monodentate benzoate groups, two by the nitrogen atoms of 3-pyridinemethanol, and two by methanolic oxygen atoms of 3-pyridinemethanol from neighbouring structural units. Due to the bridging 3-pyridinemethanol ligand, molecules of the complex are connected into infinite chains along the c axis. The bridging function is reflected in the IR spectrum by a very sharp absorption band due to the stretching vibration of the methanolic O–H group. Non-isothermal kinetics of the thermal decomposition were studied using the model-free isoconversional method. Based on isoconversional dependencies, a multi-step mechanism with parallel reactions was recognised for the decomposition of the complex.
Acknowledgments
This work was supported by the Grant Agency VEGA of the Slovak Ministry of Education (grant No. 1/9247/02). One of the authors (V.Z.) wishes to thank the Ministère délégué à la Recherche et aux Nouvelles Technologies of the French Republic for financial support during his stay at Madirel as part of the programme Accueil de jeunes chercheurs étrangers en séjour de recherche post-doctorale.
Supplementary Data
Crystallographic data have been submitted as supplementary material to the Cambridge Crystallographic Data Centre as supplementary material No. CCDC 212963. These data can be obtained free of charge via www.ccdc.cam.ac.uk/conts/retrieving.html (or from the CCDC, 12 Union Road, Cambridge CB2 1EZ, UK; Fax: +44 1223 336033; E-mail: [email protected]).