Which of the following pairs are resonance contributors ?
(A) and
(B) and
(C) and

Question

Which of the following pairs are resonance contributors ? (A) and (B) and (C) and

TestHub · Accepted Answer

Pair (A) differs only in the position of the pi electrons and the + charge, so the two cations are resonance contributors.

Pair (B) : cyclopentyl and cyclopentadienyl cations have different numbers of H and different bonding (different compounds).

Pair (C) : the + sits on different carbon atoms of the chain (atoms are not conjugated with each other), they are different cations.

Only pair (A).

Chemistry - GOC Question with Solution | TestHub