(i) (ii) (iii) (iv) (v) (vi) (vii) The number of compounds/species which obey Huckel's rule is _____

(i)   (ii)   (iii)  (iv) 

(v)  (vi)  (vii)  

The number of compounds/species which obey Huckel's rule is _____

  1. 5
  2. 4
  3. 6
  4. 2

Solution

Criteria for Huckel’s rule:

(i) Planarity-The molecule must be planar.

(ii) Complete delocalisation of π electrons

(iii) Presence of (4n + 2)π electrons in ring where n is an integer (n = 0, 1, 2, …). If the molecule has a number of π electrons that satisfies this rule, then it is considered to be aromatic. If the number of π electrons does not satisfy this rule, then the molecule is considered to be non-aromatic.

The compounds which follow Huckel’s rule are:

Asked in: NEET 2023 (All India)

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