Question

Increasing stability order of following carbocation will be:

• A. $P>R>Q>S$
• B. $R>Q>P>S$
• C. $P>Q>R>S$
• D. $R>Q>S>P$

Answer 1

The correct option is C $P>Q>R>S$

The carbocation 'P' is most stable because of
i) extent of conjugation of cyclopropyl ring
ii) dancing resonance

The carbocation 'Q' is less stable than 'P' but more stable than 'R' and 'S' due to the aromatic character of it.

In between 'R' and 'S', the carbocation 'R' is more stable than 'S' due to more more number of resonating structures.