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Mannarkkad, India

Mumthaz A.K.,Mes Kalladi College | Parameswaran G.,Mes Kalladi College
Asian Journal of Chemistry | Year: 2010

Benzoyl acetone-L-histidine was synthesized by refluxing benzoyl acetone with L-histidine. This benzoyl acetone L-histidine (BAH) was used to synthesize Mn(II) and Ni(II) complexes having metal to Iigand stiochiometry 1:1. The Iigand and metal complexes were characterized by elemental analysis, molar conductivity, electronic absorption and IR absorption spectra. The magnetic nature of the complexes was established using Gouy's balance method. The XRD data was used to index the compound for orthorhombic system. Source


Mumthaz A.K.,Mes Kalladi College | Parameswaran G.,Mes Kalladi College
Asian Journal of Chemistry | Year: 2010

The complexes of Co(II), Ni(II) and Cu(II) with dibenzoylmethane L-histidine (DBMH) have been synthesized and characterized on the basis of elemental analysis, molar conductance, magnetic moment. UV-visible and IR spectra. Co(II) and Ni(II) complexes of DBMH were subjected to thermal analysis so as to understand their thermal stability and decomposition patterns. The kinetic parameters like activation energy E, frequency factor A, entropy of activation ΔS and order parameter (n) were calculated from the TG curves, using Coats-Redfern equation. The mechanism of decomposition has been established from thermogravimetric data. On the basis of present findings the relative thermal stabilities of the chelates can be given as NiL(H 2O)3 < CoL(H2O)3. Source

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