کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
1315448 | 976029 | 2008 | 5 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Mechanisms of reactions of halogenated compounds: Part 7. Effects of fluorine and other groups as substituents on nucleophilic aromatic substitution
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کلمات کلیدی
موضوعات مرتبط
مهندسی و علوم پایه
شیمی
شیمی معدنی
پیش نمایش صفحه اول مقاله
چکیده انگلیسی
The effect of fluorine as a substituent group on nucleophilic aromatic substitution is discussed, where a fluorine atom located ortho to the point of substitution may be of variable activating influence, whereas fluorine located para is slightly deactivating and meta is activating. A rationale of these effects is presented and evidence to support polar influences by ortho fluorine is advanced. The influence of CN, CF3, CF2H and CFH2 is also established by comparison of appropriate measured rate constants and compared with the activation effects of ring nitrogen.
The influence of CN, CF3, CF2H and CFH2 on nucleophilic aromatic substitution reactions is established.Figure optionsDownload as PowerPoint slide
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Journal of Fluorine Chemistry - Volume 129, Issue 10, October 2008, Pages 998–1002
Journal: Journal of Fluorine Chemistry - Volume 129, Issue 10, October 2008, Pages 998–1002
نویسندگان
Richard D. Chambers, Peter A. Martin, Graham Sandford, D. Lyn H. Williams,