Please use this identifier to cite or link to this item:
Title: Kinetics and Mechanism of Oxidation of L-Cysteine by Bis-3-di-2-pyridylketone-2-thiophenylhydrazone- iron(III) Complex in Acidic Medium
Authors: ismail warad, $Other$Palestinian
mohammed al-nuri, $Other$Palestinian
maher abu eid, $Other$Palestinian
zeid al-othman, $Other$Other
saud al-resayes, $Other$Other
nizam diab
Keywords: Iron(II)
L -cysteine
3- Di -2-pyridylketone-2-thiophenylhydrazone ligand.
Issue Date: 2010
Publisher: E-Journal of Chemistry, 2010, 7(S1), S527-S535.
Abstract: The kinetics of oxidation of L-cysteine by 3-di-2-pyridylketone-2-thiophenylhydrazone-iron(III), [Fe(DPKTH)2]3+ complex in acidic medium was studied spectrophotometrically at 36 oC temperature. The molar ratios of DPKTH to iron(III) and iron(II) individually, were found to be [2:1] [DPKTH : iron(III)/(II)]. The reaction was stroked to be first-order with respect to iron(III) and L-cysteine, second-order with respected to DPKTH ligand and reversed second-order with respected to hydrogen ion concentration. Added salts did not affect the rate and no free radical was detected when radical detector was placed in the reaction mixture. Ethanol solvent ratio was found to effect both the initial rate and the maximum absorbance (?max) of [Fe(DPKTH)2]2+ complex. The initial rate rose when the temperature was increased which empowered to calculate the activation parameters. A suitable reaction mechanism was proposed.
Appears in Collections:Faculty & Staff Scientific Research publications

Files in This Item:
There are no files associated with this item.

Items in DSpace are protected by copyright, with all rights reserved, unless otherwise indicated.

Admin Tools