aryl radical वाक्य
उदाहरण वाक्य
मोबाइल
- An example of an addition reaction involving aryl radicals is the Meerwein arylation.
- In a general scope a Meerwein arylation is any reaction between an aryl radical and an alkene.
- This intermediate collapses into an aryl radical "'3 "'and a halide anion.
- XeF 2 can also be used to generate aryl radicals from aryl silanes, and act as atomic fluorine source to furnish aryl fluorides.
- 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.
- 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.
- 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 ).
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