The cyclopentadienyl anion (C_5H_5^-) is aromatic because it has

JEE Main Chemistry question

The cyclopentadienyl anion (CH) is aromatic because it has

(A)4 -electrons and is planar
(B)6 -electrons delocalised over 5 carbons, satisfying the ruleCorrect
(C)5 -electrons and is non-planar
(D)No -electrons at all

Answer: (B)

Solution

Each of the five ring carbons of the cyclopentadienyl anion is -hybridised with a -orbital contributing to the -system; the anion carries 6 -electrons (4 from two

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Question ID VK-142408