کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
5419175 | 1506998 | 2006 | 6 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Quantum chemical studies on acidity-basicity behaviours of some substituted pyridine derivatives
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کلمات کلیدی
موضوعات مرتبط
مهندسی و علوم پایه
شیمی
شیمی تئوریک و عملی
پیش نمایش صفحه اول مقاله
چکیده انگلیسی
The acidity-basicity behaviours of some 2,3 and 4 methoxy, methylthio and cyano substituted pyridine derivatives were investigated using DFT method. The correlation attempt between the experimental and calculated acidity constants,pKa values, revealed that the DFT calculated values are much closer to the experimental values with a regression of almost unity (R2=0.99). A strong geometry dependence of experimental acidity constants, pKa, was observed. The basicity-nucleophilicity correlation attempt between experimental acidity constants, pKa, DFT computed nucleophilicities, n, was unsuccessful. The correlation between the calculated electronic charges and experimental pKa values was unexpectedly high.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Journal of Molecular Structure: THEOCHEM - Volume 759, Issues 1â3, 14 February 2006, Pages 73-78
Journal: Journal of Molecular Structure: THEOCHEM - Volume 759, Issues 1â3, 14 February 2006, Pages 73-78
نویسندگان
C. ÃÄretir, D. ÃzöÄüt, S. Yarligan, T. Arslan,