کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
9588819 | 1393517 | 2005 | 6 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Solvent effects on the nucleophilic substitution reactions of p-nitrophenyl acetate with hydroxamate ions
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موضوعات مرتبط
مهندسی و علوم پایه
شیمی
شیمی تئوریک و عملی
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![عکس صفحه اول مقاله: Solvent effects on the nucleophilic substitution reactions of p-nitrophenyl acetate with hydroxamate ions Solvent effects on the nucleophilic substitution reactions of p-nitrophenyl acetate with hydroxamate ions](/preview/png/9588819.png)
چکیده انگلیسی
Rate constants have been measured spectrophotometrically for the reactions of p-nitrophenyl acetate (PNPA) with some α-effect nucleophiles, i.e., acetohydroxamate, benzohydroxamate, and salicylhydroxamate ions in dimethylsulfoxide, dimethylformamide, 1,4-dioxane, and acetonitrile-water mixtures of varying compositions (10-80% v/v) at 27 °C (pH 7.7). All the three hydroxamates exert a large α-effect in H2O. The reactivity of hydroxamates towards PNPA depends upon the nature of substrate and solvents. The kinetic results have been explained on the basis of basicities (pKa), solvation effect, α-effect, and ground state destabilization.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Journal of Molecular Liquids - Volume 116, Issue 1, 15 January 2005, Pages 55-60
Journal: Journal of Molecular Liquids - Volume 116, Issue 1, 15 January 2005, Pages 55-60
نویسندگان
Kallol K. Ghosh, Manmohan Lal Satnami, Daliya Sinha, Jyoti Vaidya,