Synthesis, crystal structure and thermal studies of catena(L-glutamato )-aqua copper(II) monohydrate

Department of Chemistry. University College of Science and Technology, University of Calcutta,
92. A. P. C. Road. Kolkata-700 009. India
School of Chemistry. The University of Reading. P.O. Box-224, Whiteknights, Reading RG6 6AD, U.K.
Manuscript received 24 June· 2003,revised 11 November 2003. accepted 18 February 2004

'l'he synthesis. crystal structure and thermal study of the blue caterm-(L-glutamato)-aqua copper(II) monohydrate have been reported.The compound crystallizles in P2_I2I2_I space group and consists of a polymeric three-dimensional network of copper(II) which is Coordinated with the amino nitrogen and the carboxylate oxygen of L-glutamate, the side chain carboxylate oxygen of a neighbouring L-glutamate and the oxygen of a water molecule in the equatorial position. Weak coordination of two additional glutamate oxygen atoms to both the axial positions completes a distorted octahedron. The crystal structure shows that the lattice water is stabilized by the formation of strong H-bonding network with the coordinated water molecule. Removal and reabsorption of the water molecule have been studied by thermal analysis.