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IJC-A Vol.49A(07) [July 2010] >

Title: Thermal behaviour of metal(II) isonicotinate tetrahydrates
Authors: Chakrabortty, Monideepa
Ganguli, Jatindra Nath
Bora, Sanchay Jyoti
Das, Birinchi Kumar
Keywords: Coordination chemistry
Hydrogen bonded network
Thermal stability
Irving-Williams order
Metal isonicotinate tetrahydrates
Issue Date: Jul-2010
Publisher: CSIR
Abstract: Metal isonicotinate tetrahydrates with M = Mn, Fe, Co, Ni, Cu, Zn are analogous hexacoordinate complexes of the type trans-[M(NC5H4-p-CO2)2(OH2)4], which form a robust 3-D supramolecular network in the solid state. Hydrogen bonds formed between OH2 donors and CO2- acceptors strongly hold the water molecules and the isonicotinato ligands together with the metal ions to make these compounds quite stable in air at room temperature. Thermogravimetric analysis shows that these complexes lose weight in two well defined steps occurring in the 50-600 °C range. Thermogravimetric data on the compounds are found to follow metal-dependence close to expectations based on the Irving-Williams order for bivalent metal ions.
Page(s): 876-881
Source:IJC-A Vol.49A(07) [July 2010]

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