کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
5142400 | 1496025 | 2017 | 9 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Oxidation of aliphatic aldehydes by benzimidazolium fluorochromate in non aqueous medium - A kinetic and mechanistic study
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کلمات کلیدی
موضوعات مرتبط
مهندسی و علوم پایه
شیمی
شیمی (عمومی)
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چکیده انگلیسی
The oxidation of seven aliphatic aldehydes by benzimidazolium fluorochromate (BIFC) in dimethyl sulphoxide (DMSO) leads to the formation of the corresponding carboxylic acids. The reaction is first order in BIFC. The Michaelis-Menten type kinetics was observed with respect to the aldehyde. The reaction is catalysed by hydrogen ions. The hydrogen-ion dependence has the form: kobs = a + b[H+]. The oxidation of deuterated acetaldehyde, CH3CDO, exhibited a substantial primary kinetic isotope effect (kH/kD = 6.05 at 303 K). Oxidation of acetaldehyde has been studied in eighteen different organic solvents. Various thermodynamic parameters are discussed along with isokinetic temperature. The solvent effect has been analysed using multi parametric equations. A mechanism involving transfer of hydride ion has been suggested. The linear isokinetic correlation implies that all the aldehydes are oxidized by the same mechanism.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Arabian Journal of Chemistry - Volume 10, Supplement 2, May 2017, Pages S2115-S2123
Journal: Arabian Journal of Chemistry - Volume 10, Supplement 2, May 2017, Pages S2115-S2123
نویسندگان
Basim H. Asghar, S. Sheik Mansoor, A. Mohamed Hussain, V. Saleem Malik, K. Aswin, S.P.N. Sudhan,