3-Di-2-pyridylketone-2-thiophenylhydrazone ligand

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bis-3-di-2-pyridylketone-2-thiophenylhydrazone-Iron(III) Complex in Acidic Medium

Journal Title, Volume, Page: 
Journal of Saudi Chemical Society (Impact Factor: 1.29). 12/2006
Year of Publication: 
2006
Authors: 
Ismail Warad
Department of Chemistry, King Saud University at Riyadh, Kingdom of Saudi Arabia
Saud Al-Resayes
Department of Chemistry, King Saud University at Riyadh, Kingdom of Saudi Arabia
Maher Abu Eid
Department of Chemistry, Faculty of Science, An-Najah National University, Nablus, Palestine
Current Affiliation: 
Department of Chemistry, Faculty of Science, An-Najah National University, Nablus, Palestine
Ashraf El-Baklish
Preferred Abstract (Original): 

The kinetics 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 36Co temperature.The differential rate method (initial rate) was served in this investigation. 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 tohydrogen ion concentration. Added salts did not affect the rate and no free radical was detectedwhen radical detector was placed in the reaction mixture. Ethanol solvent ratio was found to effect both the initial rate and the maximum absorbance (λmax) of [Fe(DPKTH)2]2+complex. The initial raterose when the temperature was increased which empowered the activation parameters calculations.From the evaluation of the obtained linear data, a reaction mechanism is proposed which involves a pre-equilibrium of an adduct formation between L-cysteine and [Fe(DPKTH)2]3+complex.

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Kinetics And Mechanism of Oxidation of L-Cysteine By Bis-3-Di-2-Pyridylketone-2-Thiophenylhydrazone- Iron(III) Complex In Acidic Medium

Journal Title, Volume, Page: 
E-Journal of Chemistry (Impact Factor: 0.62). 01/2010; DOI: 10.1155/2010/659749
Year of Publication: 
2010
Authors: 
Ismail Warad
Department of Chemistry King Saud University P.O Box 2455, Riyadh-11451, Saudi Arabia
Mohammed Al-Nuri
Department of Chemistry, Faculty of Science, An-Najah National University, Nablus, Palestine
Maher Abu Eid
Department of Chemistry, Faculty of Science, An-Najah National University, Nablus, Palestine
Current Affiliation: 
Department of Chemistry, Faculty of Science, An-Najah National University, Nablus, Palestine
Zeid Al-Othman
Department of Chemistry King Saud University P.O Box 2455, Riyadh-11451, Saudi Arabia
Saud Al-Resayes
Department of Chemistry King Saud University P.O Box 2455, Riyadh-11451, Saudi Arabia
Nizam Diab
Preferred Abstract (Original): 

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 o C 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 (λ 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.

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Kinetics and Mechanism of Oxidation of L-Cysteine by Bis-3-di-2-pyridylketone-2-thiophenylhydrazoneiron( III) Complex in Acidic Medium

Journal Title, Volume, Page: 
E-Journal of Chemistry;2010 Supplement 1, Vol. 7, pS527
Year of Publication: 
2010
Authors: 
Ismail Warad
Department of Chemistry, King Saud University P.O Box 2455, Riyadh-11451, Saudi Arabia
Current Affiliation: 
Department of Chemistry, Faculty of Science, An-Najah National University, Nablus, Palestine
Mohammed Al-Nuri
Department of Chemistry, Faculty of Science, An-Najah National University, Nablus, Palestine
Maher Abu Eid
Department of Chemistry, Faculty of Science, An-Najah National University, Nablus, Palestine
Zeid Al-Othman
Department of Chemistry, King Saud University P.O Box 2455, Riyadh-11451, Saudi Arabia
Saud Al-Resayes
Department of Chemistry, King Saud University P.O Box 2455, Riyadh-11451, Saudi Arabia
Nizam Diab
Department of Chemistry Arab American University-Jenin, P.O. Box 240, Jenin, Palestine
Preferred Abstract (Original): 
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 C 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 (ʎmax) 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.
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N'-(Di-2-pyridylmethylene) Benzohydrazide

Journal Title, Volume, Page: 
Acta Crystallographica Section E, Volume 65, Part 7, Page o1597 July 2009
Year of Publication: 
2009
Authors: 
Ismail Warad
Department of Chemistry, King Saud University, PO 2455, Riyadh 11451, Saudi Arabia
Current Affiliation: 
Department of Chemistry, Faculty of Science, An-Najah National University, Nablus, Palestine
Mohammed Al-Nuri
Department of Chemistry, Faculty of Science, An-Najah National University, Nablus, Palestine
Saud Al-Resayes
Department of Chemistry, King Saud University, PO 2455, Riyadh 11451, Saudi Arabia
Khalid Al-Farhan
Department of Chemistry, King Saud University, PO 2455, Riyadh 11451, Saudi Arabia
Mohamed Ghazzali
Department of Chemistry, King Saud University, PO 2455, Riyadh 11451, Saudi Arabia
Preferred Abstract (Original): 
In the title Schiff base, C18H14N4O, the amido -NH- unit is connected to one of the two pyridyl N atoms at an N(-H) N distance of 2.624 (2) Å. The molecular packing features an intermolecular C-H N R22(6) hydrogen-bonding ring motif.
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