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what is the stability of aryl carbocations?
Dear rishi,
If the carbon having positive charge is part of a benzene ring, the carbocation is an aryl carbocation. aryl carbocations do not have resonance stabilisation because their p electron clouds are perpendicular to the vacant p orbital of the carbocation.
Electronegativity is a tendency of electron attraction. So the stability of a cation is influenced by the electronegativity of the atom bearing the positive charge. The more electronegative the atom, less stable the cation. A vinylic carbocation carrying the positive charge on an sp carbon is more electronegative than an sp2 carbon of an alkyl carbocation. Therefore, a primary vinylic carbocation is less stable than a primary alkyl carbocation. Similar reasoning explains why an aryl carbocation is less stable than a typical secondary alkyl carbocation. Because of their reduced stability, vinyl and aryl carbocations are not discussed often.
We are all IITians and here to help you in your IIT JEE preparation. All the best. If you like this answer please approve it.... win exciting gifts by answering the questions on Discussion Forum Sagar Singh B.Tech IIT Delhi
We are all IITians and here to help you in your IIT JEE preparation. All the best.
If you like this answer please approve it....
win exciting gifts by answering the questions on Discussion Forum
Sagar Singh
B.Tech IIT Delhi
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