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NEET levelSingle correct optionDifficulty 1 of 3g1118

According to Huckel's rule, a planar, cyclic, fully conjugated system is aromatic if it contains

A $(2 n + 1) π$ electrons
B $(4 n + 2) π$ electrons, where $n = 0, 1, 2, \dots$
C $(4 n + 2) σ$ electrons
D $4 n π$ electrons

Answer: B

Huckel's rule states that the number of pi electrons must be 2, 6, 10, ... i.e.

4 n + 2

.

4 n

pi electrons make the planar cyclic system antiaromatic.

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