First slide
Reactive intermediates

The most stable carbocation amongst the following is:


→ Bridge head carbocation is highly unstable

Reason, the bridge head carbocation unable to acquires the planarity [120o] , and hence it is highly unstable.

As the no. of +IE groups [alkyl groups] increases,

sharing of positive charge by no of carbon atoms increases,

i.e., charge distribution among the atoms increases,

hence stability of carbocation increases.


sharing increases,

caring increases,

stability increases.




"H" is neither +IE nor –IE group                                      Here  "CH3" group acts as +IE group

+ve cahrge located only on single carbon                   

+ve charge is shared among the 4-carbon atoms

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