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As per your syllabus, the THREE criteria for aromaticity (Hückel) are which set?
ALinear, sp, free rotation set
BPyramidal, sp³, two lone pairs
CPlanar, delocalised π, (4n+2)π
DTetrahedral, sp³, fully σ bonds
Answer & Solution
Correct answer: C. Planar, delocalised π, (4n+2)π
Your syllabus: (i) planarity,
(ii) complete π delocalisation,
(iii) (4n+2) π electrons in the ring (Hückel's rule, n = 0, 1, 2…).
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