C Abdul Hakeem College Autonomous

Melvisharam, India

C Abdul Hakeem College Autonomous

Melvisharam, India
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Hemalatha S.,Bharathiar University | Asghar B.H.,University of Umm Al - Qura | Mansoor S.S.,C Abdul Hakeem College Autonomous
Asian Journal of Chemistry | Year: 2017

The oxidation of benzhydrol (BH) by tetrabutylammoniumbromochromate (TBABC) was studied in aqueous acetic acid medium. The reaction is first order with respect to tetrabutylammoniumbromochromate, benzhydrol and [H+] and the reaction is catalyzed by hydrogen ions. The reaction has been studied in the presence of picolinic acid and 1,10-phenanthroline as promoters. The promoters used in this oxidation reaction, picolinic acid and 1,10-phenanthroline are strong chelating ligands which form complexes with most transition metal ions. Among the two promoters oxidation is much faster with 1,10-phenanthroline. The low dielectric constant of the medium assists the complex formation and enhances the reactivity. The reactions were studied at different temperatures at different acetic acid-water composition and various thermodynamic parameters have been determined. The observed experimental results have been explained by plausible mechanisms. © 2017, Chemical Publishing Co. All rights reserved.


Rajiv Gandhi S.,C Abdul Hakeem College Autonomous | Sathis Kumar D.,King College | Syed Tajudeen S.,C Abdul Hakeem College Autonomous | Ibrahim Sheriff A.K.,C Abdul Hakeem College Autonomous
Asian Journal of Chemistry | Year: 2017

A novel tetradentate chelate was synthesized by the condensation of cinnamaldehyde and triethylenetetramine. The chelate ligand was used to prepare mononuclear transition metal complexes of Mn(II), Fe(III), Co(II), Ni(II) and Cu(II) ions. They were charactertized by elemental analyses, conductivity studies, magenetic properties, infrared spectra, UV-visble spectra, 1H NMR and 13C NMR spectra, electron spin resonance spectra, mass spectra and thermogram studies. Their ligand field parameters and LFSE have also been determind. Kinetic studies on the hydrolysis of ethyl acetate have been studied using Co(II) and Ni(II) complexes as homogeneous catalysts and oxidation of pyrocatechol to o-quinone using Co(II), Ni(II) and Cu(II) complexes. The deoxyribonucleic acid cleavage activities of pUC19 DNA examined against chelate ligand and its metal complexes have been evaluated by agarose gel electrophoreises method in the presence of H2O2. The antimicrobial studies of Schiff base and its metal complexes were tested against the fungi Candida albicans and Aspergillus Niger and bacteria Escherichia coli, Staphylococcus aureus and Bacillus cereus.


Jabir S.,Bharathiar University | Asghar B.H.,University of Umm Al - Qura | Mansoor S.S.,C Abdul Hakeem College Autonomous
Oriental Journal of Chemistry | Year: 2017

The tetrabutylammonium bromochromate (TBABC) oxidation of anilines, in an aqueous acetic acid medium in the presence of perchloric acid is described. The reaction is first order with respect to aniline, TBABC and acid. The reaction rate has been determined at different temperatures and activation parameters calculated. The TBABC oxidation of meta-substituted anilines obeys Hammett relationships. © 2017, Oriental Scientific Publishing Company. All rights reserved.


Yogananth A.,Bharathiar University | Asghar B.H.,University of Umm Al - Qura | Sheik Mansoor S.,C Abdul Hakeem College Autonomous
Asian Journal of Chemistry | Year: 2017

The kinetics of oxidation of 4-oxo-4-phenyl butanoic acid (4-oxo acid), p-methoxy (p-OCH3), p-ethoxy (p-OC2H5), p-methyl (p-CH3), p-chloro (p-Cl), p-bromo (p-Br) and p-acetyl (p-COCH3) 4-oxo acids by tripropylammonium fluorochromate (TriPAFC) in aqueous acetic acid medium in the presence of perchloric acid have been described. The reaction is first order with respect to 4-oxo acid, TriPAFC and perchloric acid. The order of reactivity among the studied 4-oxoacids is: p-OCH3 > p-OC2H5 > p-CH3 > p-H > p-Cl > p-Br > p-COCH3. The effect of changes on the electronic nature of the substrate reveals that there is a development of positive charge in the transition state. The activation parameters have been computed from Arrhenius and Eyring plots. Based on the kinetic results, a suitable mechanism has been proposed.


Malik V.S.,C Abdul Hakeem College Autonomous | Vannamuthu I.,C Abdul Hakeem College Autonomous | Vannamuthu I.,Periyar Government Arts College | Shafi S.S.,Thiruvalluvar University | Mansoor S.S.,C Abdul Hakeem College Autonomous
Oriental Journal of Chemistry | Year: 2015

The kinetics of benzimidazolium fluorochromate (BIFC) catalysed oxidation of indole-2: aldehyde (2-InA) with perchloric acid in 50% acetic acid-50% water solvent mixture at 303 K has been followed spectrophotometrically. The reaction is first order with respect to [BIFC], [2-InA] and [H+] and the reaction is catalyzed by hydrogen ions. A suitable mechanism has been proposed.


Rajiv Gandhi S.,Sri Balaji Chockalingam Engineering College | Sathis Kumar D.,C Abdul Hakeem College Autonomous | Srinivasan R.,Vellore Institute of Technology | Ibrahim Sheriff A.K.,C Abdul Hakeem College Autonomous
Asian Journal of Chemistry | Year: 2016

Transition metal complexes of Mn(II), Fe(III), Co(II), Ni(II) and Cu(II) ions have been synthesized from cinnamaldehyde and diethylenetriamine. The complexes have been characterized by elemental analysis, molar conductance, magnetic susceptibility, FT-IR, electronic spectra, 1H NMR, 13C NMR, ESR, mass spectra and thermal studies. Their ligand field parameters have also been calculated. Hydrolysis of ethyl acetate has been studied by using the complexes as homogeneous catalysts. The DNA cleavage activities of Schiff base and its metal complexes have been monitored by agarose gel electrophoresis method in the presence of hydrogen peroxide. The antimicrobial activities of ligand and its metal complexes have been examined on the fungi Candida albicans and Aspergillus niger and bacteria Staphylococcus aureus, Escherichia coli and Bacillus cereus. © 2016, Chemical Publishing Co. All rights reserved.


Kumar D.S.,C Abdul Hakeem College Autonomous | Gandhi S.R.,Sri Balaji Chockalingam Engineering College | Mageswari A.,Vellore Institute of Technology | Karthikeyan S.,Vellore Institute of Technology | Ibrahim Sheriff A.K.,C Abdul Hakeem College Autonomous
Asian Journal of Chemistry | Year: 2016

A qudridendate Schiff base ligand is synthesized by the condensation of active primary amine 2-amino-4-tert-butylphenol with β-diketone. It is found to be an N2O2 donor chelate. Quadridentate Schiff bases with an N2O2 donor have been widely studied for their ability to coordinate metal ions. Its complexes with Fe(III), Co(II), Ni(II), Cu(II) and Zn(II), have been synthesized and characterized by micro analysis, molar conductivity, magnetic susceptibility studies, UV, IR, NMR, Mass spectral studies, cyclic voltammetry, ESR spectral studies, thermal behaviour and Powder X-ray diffraction studies have also been carried out. The DNA cleavage activities of the Schiff base and its complexes were monitored by agarose gel electrophoresis method in the presence of hydrogen peroxide and antibacterial activities have also been studied.


Khan M.F.,C Abdul Hakeem College Autonomous | Wesley S.G.,Scott Christian College Autonomous
Marine Pollution Bulletin | Year: 2016

Several species of tuna fish were analyzed for 210Po content in their edible muscle tissues. This study was carried out as a part of baseline data generation around a large nuclear power plant situated at Kudankulam, southeast coast of India. The concentration of 210Po in the muscle tissue ranged from 40.9±5.2 to 92.5±7.9Bq/kg of fresh fish, and the highest activity was recorded for the tuna Euthynnus affinis and the lowest for Auxis thazard. The committed effective dose to the local residents was calculated to be 62.7-141.8μSvyear-1. © 2016.


Sathis Kumar D.,C Abdul Hakeem College Autonomous | Ibrahim Sheriff A.K.,C Abdul Hakeem College Autonomous
Der Pharma Chemica | Year: 2015

Two Schiff base ligands L1 and L2 were obtained by the condensation of o-phenylenediamine with pmethylbenzaldehyde and p-methoxybenzaldehyde respectively. Their complexes with Co(II) were prepared and characterized by elemental analyses, molar conductance, magnetic susceptibility, IR, UV-Vis spectra, NMR, Mass spectral studies, thermal behaviour and Powder X-ray diffraction studies have also been carried out. The IR data demonstrate the bidentate coordination of L1 and L2. The XRD data show that Co(II) complexes with L1 and L2 have the crystallite sizes of 70 and 72 nm respectively. The DNA cleavage activities of the Schiff base and its complexes were monitored by agarose gel electrophoresis method in the presence of hydrogen peroxide and the antibacterial activities of the ligand and complexes have also been carried out.


Yogananth A.,Bharathiar University | Mansoor S.S.,C Abdul Hakeem College Autonomous
Oriental Journal of Chemistry | Year: 2015

Tripropylammonium fluorochromate (TriPAFC) in acetic acid-water medium oxidizes 4-oxo-4-phenyl butanoic acid (4-Oxo acid) in the presence of perchloric acid. The reaction is first order each in [TriPAFC], [4-Oxo acid] and [H+]. From the observed kinetic results a suitable mechanism has been proposed. © 2015, Oriental Scientific Publishing Company. All rights reserved.

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