Correct statements for given reaction are: (A) Compound B is aromatic (B) Completion is very slow (C) A shows…
General Organic Chemistry (GOC) · Class 11 · JEE Main Previous Year Question
Correct statements for given reaction are:
(A) Compound B is aromatic
(B) Completion is very slow
(C) A shows tautomerism
(D) Bond lengths C-C in B are same
- a
(A), (B) and (D) only
- b
(A), (B) and (C) only
- c
(B), (C) and (D) only
- d✓
(A), (C) and (D) only
(A), (C) and (D) only
Step 1: Analyzing Squaric Acid Reaction Squaric acid reacts with 2 equivalents of to form the squarate dianion (Compound B).
- (A) Aromaticity: The squarate dianion is a 2π-electron system (resonance hybrid) which is aromatic and very stable. (True)
- (C) Tautomerism: Squaric acid (Compound A) exists in equilibrium with its tautomeric forms. (True)
- (D) Bond Lengths: Due to aromaticity and resonance, all bond lengths in the square dianion are identical. (True)
- Statement (B) says completion is very slow, which is typically false for acid-base neutralizations of such sharp acids.
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