Crystal Research and Technology
Cryst. Res. Technol. 41, 517 (2006) - Abstract -

Crystal structure of a ternary mononuclear copper (II) complex: 4-chloro-3-methyl-6[(N-2-picolyl)-1’-iminomethyl]phenolato copper(II)perchlorate

S. M. Malathy Sony, M. Kuppayee, M. N. Ponnuswamy, J. Manonmani*, M. Kandasamy*, K. Sivakumar**, and H.-K. Fun**

Department of Crystallography and Biophysics, University of Madras, Guindy Campus, Chennai-600 025, India
*Department of Inorganic Chemistry, University of Madras, Guindy Campus, Chennai-600 025, India
**X-ray Crystallography Unit, School of Physics, Universiti Sains Malaysia, 11800 USM, Penang, Malaysia

Keywords ternary copper (II) complex, octahedral, picolyl, perchlorate, crystal structure, tridentate
PACS 61.66.Hq
DOI 10.1002/crat.200510615

The complex crystallizes in monoclinic space group P21/n with unit cell parameters a = 7.295(4), b = 19.627(5), c = 12.770(4) Å, β = 101.25(4)º, V = 1793.2(12) Å3, Z = 4, ρ = 1.684 Mg/m3 at T = 293(2)K. The structure was solved by Patterson method and refined by full-matrix least-squares procedures to final R = 0.0387 using 2906 observed reflections. The asymmetric unit of the complex contains a mononuclear tridentate ligand, a perchlorate group and a methanol molecule. The compound crystallizes as parallel layers of polymeric complex bridged through perchloarate groups. The molecular CuN2OO’O’’2 chromophore involves an elongated rhombic octahedral structure and the Cu-ligand bond shows greater disparity. The five-membered chelate ring and the pyridine ring lie in the same plane while the six membered chelate ring assumes sofa conformation. A strong O-H…O inter molecular interaction plays a key role in the formation of dimer along b-axis.




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