Journal of Chemistry

Journal of Chemistry / 2012 / Article

Open Access

Volume 9 |Article ID 971981 | 11 pages | https://doi.org/10.1155/2012/971981

Synthesis and Characterization of Group-6 Metal Carbonyl Complexes of Aroyl Hydrazone Derivatives

Received22 Feb 2011
Revised16 Jul 2011
Accepted30 Jul 2011

Abstract

Carbonyl complexes of Chromium, molybdenum and tungsten of composition, [M(CO)4L-L], (where M= Cr, Mo or W and L-L= benzoic acid[1-(Furan-2-yl)methylene]hydrazide (BFMH), benzoic acid[(thiophene-2-yl)methylene]hydrazide (BTMH), benzoic acid[1-(thiophene-2-yl)ethylidene] hydrazide (BTEH), benzoic acid (phenylmethylene)hydrazide (BPMH) and benzoic acid[1-(anisol-3-yl)methylene] hydrazide (BAMH) are reported. These have been prepared by refluxing metal carbonyls and the ligands in 1:1molar ratio. The complexes were characterized by elemental analysis, IR spectra, UV-vis spectra, 1H NMR, TGA/DTA, conductivity and magnetic susceptibility measurements. The IR bands suggest that in all the complexes the ligands behave as neutral bidentate chelating type coordinating metal through carbonyl oxygen and azomethine nitrogen. The CO force constants and CO-CO interaction constants for these derivatives have been calculated using Cotton-Kraihanzel secular equations, which indicate poor π-bonding ability of the coordinated ligands.

Copyright © 2012 Hindawi Publishing Corporation. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.


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