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Infrared Spectroscopic Characterization of Calcium and Barium Hydrazone Complexes

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Author(s): A. Adeniyi | O. Okedeyi | J. Aremu | O. Oyedeji | M. Sowemimo

Journal: Pakistan Journal of Chemistry
ISSN 2220-2625

Volume: 3;
Issue: 2;
Start page: 64;
Date: 2013;
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Keywords: barium | calcium | hydrazones | infrared spectroscopy

ABSTRACT
Hydrazones have attracted considerable interest on account of their biological activities. Introduction of calcium and barium metalions into m- and p-nitrobenzoic hydrazones is expected to modify these biological properties for enhanced activity and versatility.The ligands were synthesized from the parent acids. The complexes have been characterized using C, H and N microanalyses andIR spectrometry. The IR spectral data of the ligands and complexes revealed bonding via the C=O and C=N groups. The suggested metal to ligand stoichiometries are: [M (m-NBH)x]Cl2.yH2O, x, y = 1 and 4 for M = Ca; x, y = 2 and 3 for M = Barespectively.[M(p-NBH)x]Cl2.yH2O, x, y = 1 and 12 for M = Ca; x, y = 1 and 3 for M = Ba respectively. The structural deductions are tentative pending future X-ray structural studies.
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