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Journal of Coordination Chemistry
Year: 2009  |  Volume: 62  |  Issue: 5  |  Page No.: 767 - 777

Synthesis, structure and spectroscopic study of Cu(II) polypyridine complexes with phenylcyanamide derivative ligands

Ali Reza Rezvani and Hadi Esfandiari    

Abstract: Several new mononuclear copper(II) complexes, [Cu(phen)2L]PF6, where phen = 1,10-phenanthroline and L = monoanions of phenylcyanamide (pcyd), 2,5-dichlorophenylcyanamide (2,5-Cl2pcyd), 2-dichlorophenylcyanamide (2-Clpcyd) and 4-methylphenylcyanamide (4-Mepcyd), have been prepared and characterized by elemental analysis, UV-Vis, IR and 1H NMR spectroscopies and cyclic voltammetry. [Cu(phen)2(2,5-Cl2pcyd)]PF6 crystallized with a molecule of acetone with empirical formula of C31H20N6OF6Cl2PCu in a triclinic crystal system and space group P1 with a = 9.2086(6) , b = 13.3117(9) , c = 15.5313(10) , α = 107.8210(10)°, β = 104.6180(10)°, γ = 104.1670(10)°, V = 1643.21(19) 3 and Z = 2. The structure was refined using 7555 Mo-Kagr reflections with I > 2σ(I) and R1 = 0.0276 and Rw = 0.0692. The results are consistent with a mostly σ bonding interaction between Cu(II) and cyanamide anion. The LMCT band intensity and electrochemical potentials are compared with ruthenium phenylcyanamide analogues.

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