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Palladium(II)-Catalyzed Oxidation of Pyrimidine Derivative by Hexacyanoferrate(III) in Aqueous Alkaline Medium: A Kinetic Study Ahmed

ملخص البحث

The of kinetics of oxidation of a pyrimidine derivative, N,N-dimethyl-N’-(pyrimidin-2-yl) formamidine (Pym-F), by hexacyanoferrate(III) (HCF) was studied in aqueous alkaline medium in the presence of palladium(II) catalyst. The reaction did not proceed in the absence of Pd(II) catalyst. The progress of the catalyzed reaction was followed spectrophotometrically. The reaction showed a first order kinetics in both [HCF] and [Pd(II)], and less than unit orders with respect to both [Pym-F] and [OH- ]. Increasing ionic strength and dielectric constant of the medium increased the reaction rate. A mechanistic scheme for the catalyzed oxidation reaction has been proposed. The final oxidation products are identified as 2-aminopyrimidine, dimethylamine and carbon dioxide. The rate law expression associated with the reaction mechanism is derived and the reaction constants involved in the different steps of the mechanism are calculated. The activation parameters with respect to the ratedetermining step have been computed and discussed.

مؤلف البحث
Fawzy, Ishaq Zaafarany, Fahd Turkistani, Jabir Alfahemi, Moataz Morad
تاريخ البحث
مستند البحث
50. Pym HCF 2016.pdf (603.8 كيلوبايت)
مجلة البحث
American Journal of Chemical Engineering
مؤلف البحث
صفحات البحث
38-45
عدد البحث
4
سنة البحث
2016