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Vol. 28 No. 4 (2016): Vol 28 Issue 4

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Unprecedented Pentacoordination of Di-2-pyridyl ketone N(4)-ethyl thiosemicarbazone Ligand with Formation of Trinuclear Cu(II) Complex

https://doi.org/10.14233/ajchem.2016.19541
S. Renjusha
Department of Chemistry, N.S.S. College, Pandalam-689 501, India
K. Laly
Department of Applied Chemistry, Cochin University of Science and Technology, Cochin-682 022, India
M.R. Prathapachandra Kurup
Department of Applied Chemistry, Cochin University of Science and Technology, Cochin-682 022, India

Corresponding Author(s) : M.R. Prathapachandra Kurup

mrp@cusat.ac.in

Asian Journal of Chemistry, Vol. 28 No. 4 (2016): Vol 28 Issue 4

Abstract

The syntheses and characterization of six copper(II) complexes of di-2-pyridyl ketone N(4)-ethylthiosemicarbazone (HDpyETsc) are reported by means of partial elemental analyses, molar conductance measurements, electronic, infrared and EPR spectral studies. The complexes are represented as [Cu3(DpyETsc)2(NO3)4(H2O)2]·H2O (1), [Cu(DpyETsc)N3]·H2O (2), [Cu(DpyETsc)Cl]2·H2O (3), [Cu2(DpyETsc)2SO4]2·4H2O (4), [Cu(DpyETsc](ClO4)2·H2O (5) and [Cu(DpyETsc)(NCS)]2 (6). The compound 1 was found to be a trinuclear copper(II) complex with the ligand showing pentacoordination which is unprecedented for this type of ligand. Two centro-symmetric six membered metallocycles are formed and the terminal copper atoms have distorted square pyramidal geometry.

Keywords

Thiosemicarbazone Cu(II) complex Di-2-pyridyl ketone Crystal structure EPR spectra
Renjusha, S., Laly, K., & Kurup, M. P. (2015). Unprecedented Pentacoordination of Di-2-pyridyl ketone N(4)-ethyl thiosemicarbazone Ligand with Formation of Trinuclear Cu(II) Complex. Asian Journal of Chemistry, 28(4), 864–870. https://doi.org/10.14233/ajchem.2016.19541
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