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Cobalt(II), Copper(II) and Zinc(II) Complexes of Di-2-pyridyl Ketone-4- Methoxybenzhydrazone: Preparation and Characterization


Affiliations
1 Department of Chemistry, School of Physical Sciences, Central University of Kerala, Tejaswini Hills, Periye, Kasaragod, 671320, Kerala,, India
 

A new aroylhydrazone ligand, di-2-pyridyl ketone-4-methoxybenzhydrazone (DKMBH∙H2O) and its three complexes with cobalt(II), copper(II) and zinc(II), labelled Co(DKMB)Cl (1), Cu(DKMB)Cl (2), and Zn(DKMB)Cl (3) have been prepared and structurally studied. The spectroscopic techniques like IR, UV-Vis, MS, and 1H NMR, as well as CHN analysis and thermal analysis, have been used to physico-chemically characterize the synthesized compounds. The IR and 1H NMR analyses have made clear that the aroylhydrazone remains in the amido form in the solid state. The IR spectral measurements further support the tridentate character of the NNO donor aroylhydrazone. In all complexes, pyridine nitrogen, azomethine nitrogen, and iminolate oxygen of the tridentate aroylhydrazone are involved to coordinate to the metal centre.

Keywords

1H NMR spectrum, Aroylhydrazone, IR spectrum, Mass spectrum, Metal complex, NNO donor, UV-Vis spectrum
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  • Cobalt(II), Copper(II) and Zinc(II) Complexes of Di-2-pyridyl Ketone-4- Methoxybenzhydrazone: Preparation and Characterization

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Authors

Nishana L K
Department of Chemistry, School of Physical Sciences, Central University of Kerala, Tejaswini Hills, Periye, Kasaragod, 671320, Kerala,, India
A Sakthivel
Department of Chemistry, School of Physical Sciences, Central University of Kerala, Tejaswini Hills, Periye, Kasaragod, 671320, Kerala,, India
M R Prathapachandra Kurup
Department of Chemistry, School of Physical Sciences, Central University of Kerala, Tejaswini Hills, Periye, Kasaragod, 671320, Kerala,, India

Abstract


A new aroylhydrazone ligand, di-2-pyridyl ketone-4-methoxybenzhydrazone (DKMBH∙H2O) and its three complexes with cobalt(II), copper(II) and zinc(II), labelled Co(DKMB)Cl (1), Cu(DKMB)Cl (2), and Zn(DKMB)Cl (3) have been prepared and structurally studied. The spectroscopic techniques like IR, UV-Vis, MS, and 1H NMR, as well as CHN analysis and thermal analysis, have been used to physico-chemically characterize the synthesized compounds. The IR and 1H NMR analyses have made clear that the aroylhydrazone remains in the amido form in the solid state. The IR spectral measurements further support the tridentate character of the NNO donor aroylhydrazone. In all complexes, pyridine nitrogen, azomethine nitrogen, and iminolate oxygen of the tridentate aroylhydrazone are involved to coordinate to the metal centre.

Keywords


1H NMR spectrum, Aroylhydrazone, IR spectrum, Mass spectrum, Metal complex, NNO donor, UV-Vis spectrum

References