Polar influences in radical reactions. Part VII. Hydrogen abstraction from nuclear-substituted diphenylmethanes, deoxybenzoins, and allylbenzenes by atomic bromine
The relative reactivities of nuclear-substituted diphenylmethanes, deoxybenzoins (X·C6H4·CH2Bz), and allylbenzenes towards atomic bromine at 80° have been determined by means of competitive reactions by use of allylbenzene, diphenylmethyl methyl ether, and p-bromoethylbenzene, respectively, as refer...
محفوظ في:
| المؤلفون الرئيسيون: | , |
|---|---|
| التنسيق: | مقال |
| منشور في: |
Royal Society of Chemistry
1970
|
| الموضوعات: | |
| الوصول للمادة أونلاين: | http://eprints.um.edu.my/24615/ https://doi.org/10.1039/J29700000535 |
| الوسوم: |
إضافة وسم
لا توجد وسوم, كن أول من يضع وسما على هذه التسجيلة!
|
| الملخص: | The relative reactivities of nuclear-substituted diphenylmethanes, deoxybenzoins (X·C6H4·CH2Bz), and allylbenzenes towards atomic bromine at 80° have been determined by means of competitive reactions by use of allylbenzene, diphenylmethyl methyl ether, and p-bromoethylbenzene, respectively, as reference standard. The results show p-values of -0.93, -0.92, and -0.68 by the Hammett equation for the three systems, the first two systems being better correlated by σ-constants while in the third system σ+-constants gave better correlation in agreement with a previous report. The probable reasons for the correlation with σ-constants are discussed. The ρ-values for these systems fit in well with the consistent inverse relationship with the reactivity values previously observed. |
|---|