Which of the following compound does not follow Huckel's rule?

Step-by-step solution

An aromatic compound can follow Huckel's rule if it has ( 4 n + 2 ) π -electrons where, n = integer 0 , 1 , 2 , 3 , … etc. Thus, (a) n = 0 ;   4 × 0 + 2 = 2 π ∴ follow Huckel's rule (b) n = 1 ; Number of π -electrons = 6 ∴ follows Huckels rules. (c) n = 1 ; Number of π -electrons = 6 ∴ follows Huckel's rule. (d) n = 1 , Number of π -electrons = 8 ( 4 n + 2 = 4 × 1 + 2 = 6 ) but this compound has 8 electrons which distorts the plane and henc