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NEILS BOHR
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why is phenyl shift better than methyl shift?
NEILS BOHR said:
i mean whenever there's a possibility of the 2 happening , why is the former given more priority than the latter??
Yanick said:Its still case dependent.
If the carbocation is adjacent to a carbon bearing an alkyl and phenyl group, then the alkyl group (or hydride or what have you) would shift to place the carbocation in the benzylic position. A phenyl shift, in this situation, would not result in the most stable carbocation.
chemisttree said:Is that true? The transition state is a three centered bond that contains a positive charge. What can happen with a cationic charge associated with a phenyl group that isn't possible with a methyl group?
A phenyl and methyl shift is a type of reaction in organic chemistry where a phenyl (C6H5) group and a methyl (CH3) group are transferred between two molecules.
A phenyl and methyl shift occurs through a process called electrophilic aromatic substitution. In this process, a phenyl or methyl group is transferred from one molecule to another through a series of intermediate steps.
The factors that influence a phenyl and methyl shift include the stability of the intermediate carbocation, the strength of the electrophile, and the nature of the leaving group.
Some common examples of phenyl and methyl shift reactions include the Friedel-Crafts alkylation and acylation reactions, as well as the Beckmann rearrangement.
Understanding phenyl and methyl shift reactions is important in organic chemistry because it helps predict the reactivity of different compounds and allows for the design and synthesis of new molecules with desired properties.