Copper(II) complexes of tetradentate N2S2 donor sets: Synthesis,crystal structure characterization and reactivity |
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| Authors: | S Sarkar A Patra MGB Drew E Zangrando P Chattopadhyay |
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| Institution: | 1. Department of Chemistry, Burdwan University, Golapbag, Burdwan 713 104, India;2. Department of Chemistry, Reading University, Reading RG 66AD, Berks, UK;3. Dipartimento di Scienze Chimiche, Via Licio Giorgieri 1, 34127 Trieste, Italy |
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| Abstract: | Two mononuclear and one dinuclear copper(II) complexes, containing neutral tetradentate NSSN type ligands, of formulation CuII(L1)Cl]ClO4 (1), CuII(L2)Cl]ClO4 (2) and CuII2(L3)2Cl2](ClO4)2 (3) were synthesized and isolated in pure form where L1 = 1,2-bis(2-pyridylmethylthio)ethane, L2 = 1,3-bis(2-pyridylmethylthio)propane and L3 = 1,4-bis(2-pyridylmethylthio)butane]. All these green colored copper(II) complexes were characterized by physicochemical and spectroscopic methods. The dinuclear copper(II) complex 3 changed to a colorless dinuclear copper(I) species of formula CuI2(L3)2](ClO4)2,0.5H2O (4) in dimethylformamide even in the presence of air at ambient temperature, while complexes 1 and 2 showed no change under similar conditions. The solid-state structures of complexes 1, 2 and 4 were established by X-ray crystallography. The geometry about the copper in complexes 1 and 2 is trigonal bipyramidal whereas the coordination environment about the copper(I) in dinuclear complex 4 is distorted tetrahedral. |
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| Keywords: | Copper(II) complex Copper(I) complex Nitrogen&ndash sulphur ligands Crystal structure |
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