Correct statements for the given reaction are: A. Compound ‘ B ’ is aromatic B. The completion…

Correct statements for the given reaction are:

A. Compound ‘B’ is aromatic

B. The completion of above reaction is very slow

C. ‘A’ shows tautomerism

D. The bond lengths of C-C in compound B are found to be same

Choose the correct answer from the options given below.

  1. B, C and D only
  2. A, B and C only
  3. A, C and D only
  4. A, B and D only

Solution

Aromatic compounds are cyclic, planar and must obey Huckel’s rule i.e. molecule must have 4n+2 pi-electrons where n is an integer (i.e. n= 0, 1, 2, 3, 4…etc.).  The compound B follws the Huckel's rule. The acid-base reactions fast reactions. Compound (A), also called squaric acid is a strong acid. So, above reaction proceeds very fast. All C-C bond lengths in B are same due to resonance. A shows tautomerism. A

Asked in: JEE Main 2023 (12 Apr Shift 1)

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