کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
5375977 | 1389343 | 2008 | 9 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
The substituent effects of the leaving groups on the aminolysis of phenyl acetates: DFT studies
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موضوعات مرتبط
مهندسی و علوم پایه
شیمی
شیمی تئوریک و عملی
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چکیده انگلیسی
The density functional theory B3LYP/6-31G(d, p) method is employed to study the mechanism of aminolysis reaction of p-substituted phenyl acetates (CH3C(O)OC6H4X, X = H, NH2, and NO2) with ammonia in the gas phase. Two reaction pathways are considered: the concerted process and the stepwise pathway through neutral intermediates. The substituent effects of the leaving groups on the reactivity of phenyl acetates are discussed. The solvent effect of acetonitrile on the title reaction is also assessed by the polarizable continuum model (CPCM model) at B3LYP/6-31++G(d, p) level of theory. The calculated results show that the activation barriers of the concerted pathways are lower than those of the rate-controlling steps of the stepwise processes for all the three aminolysis reactions. This aminolysis of phenyl acetates is more favorable for X = NO2 than for X = H and NH2 in the gas phase and in acetonitrile.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Chemical Physics - Volume 345, Issue 1, 3 April 2008, Pages 73-81
Journal: Chemical Physics - Volume 345, Issue 1, 3 April 2008, Pages 73-81
نویسندگان
Guang-Quan Yi, Yi Zeng, Xue-Fei Xia, Ying Xue, Chan-Kyung Kim, Guo-Sen Yan,