کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
9633562 | 1426347 | 2005 | 9 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Thermodynamics of the hydrolysis reactions of nitriles
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کلمات کلیدی
موضوعات مرتبط
مهندسی و علوم پایه
مهندسی شیمی
مهندسی شیمی (عمومی)
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چکیده انگلیسی
Microcalorimetry and high-performance liquid chromatography (h.p.l.c) have been used to conduct a thermodynamic investigation of the following nitrilase catalyzed reactions: (1) benzonitrile(aq) + 2H2O(l) = benzoic acid(aq) + ammonia(aq), (2) benzylcyanide(aq) + 2H2O(l) = benzeneacetic acid(aq) + ammonia(aq), (3) 3-phenylpropionitrile(aq) + 2H2O(l) = 3-phenylpropanoic acid(aq) + ammonia(aq), (4) 4-phenylbutyonitrile(aq) + 2H2O(l) = 4-phenylbutyric acid(aq) + ammonia(aq), (5) α-methylbenzyl cyanide(aq) + 2H2O(l) = α-methylbenzene acetic acid(aq) + ammonia(aq), and (6) 3-indoleacetonitrile(aq) + 2H2O(l) = indole-3-acetic acid(aq) + ammonia(aq). The equilibrium measurements showed that these reactions proceeded to completion. Thus, it was possible to set only lower limits for the values of the apparent equilibrium constants Kâ². However, it was possible to obtain precise values of the calorimetrically determined molar enthalpies of reaction ÎrHm(cal). These values were then used in conjunction with an equilibrium model to calculate values of the standard molar enthalpies for chemical reference reactions that correspond to the above overall biochemical reactions.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: The Journal of Chemical Thermodynamics - Volume 37, Issue 7, July 2005, Pages 720-728
Journal: The Journal of Chemical Thermodynamics - Volume 37, Issue 7, July 2005, Pages 720-728
نویسندگان
Yadu B. Tewari, Robert N. Goldberg,