aryl radical meaning in Hindi

Examples

1. An example of an addition reaction involving aryl radicals is the Meerwein arylation.
2. In a general scope a Meerwein arylation is any reaction between an aryl radical and an alkene.
3. This intermediate collapses into an aryl radical "'3 "'and a halide anion.
4. XeF 2 can also be used to generate aryl radicals from aryl silanes, and act as atomic fluorine source to furnish aryl fluorides.
5. An electron-withdrawing group ( EWG ) on the alkene makes it electron deficient and although the reaction mechanism is unclear, involvement of an aryl radical is presumed after loss of nitrogen in the diazonium salt followed by a free radical addition.
6. The aryl radical reacts with the nucleophile "'4 "'to a new radical anion "'5 "'which goes on to form the substituted product by transferring its electron to new aryl halide in the chain propagation.
7. The energy required in an aryl radical for the 1, 2-shift can be high ( up to 60 kJ / mol ) but much less than that required for a proton abstraction to an aryne ( 82 kcal / mol or 340 kJ / mol ).