Synthesis, structure and characterization of (NH4)2[Cu2(H2O)4(NH3CH2COO)2(NH2CH2COO)2]H2V10O28•6H2O

The decavanadate with a novel glycine-glycinato complex of copper (II) in the cationic part, (NH4)(2)(Cu-2 (H2O)(4)(NH3CH2COO)(2)(NH2CH2COO)(2)]H2V10O28 center dot 6H(2)O (1), has been prepared and characterized by elemental analysis, infrared and EPR spectroscopies. The triplet X band EPR spectrum of powdered sample evidenced magnetic interaction between the Cu(II) atoms in the dimeric unit which is probably realized through the bridging water molecules in this part of the complex. A single crystal X-ray diffraction study revealed that the structure of 1 contains cationic copper complex with a rare Cu (H2O)(2)Cu double bridge. In this cation, a simultaneous bidentate N, O- and monodentate O- coordination of glycine to the same central atom was observed for the first time. (C) 2010 Elsevier B.V. All rights reserved.