Question

Which of the following carbonyl compounds does NOT undergo aldol condensation?

• A. Acetone
• B. Benzophenone
• C. Acetaldehyde
• D. Acetophenone

Hint:

Aldol condensation requires an alpha-hydrogen on the carbonyl compound for enolate formation. Benzophenone lacks these hydrogens.

Answer 1

The Correct Option is B

Step 1: Understanding Aldol Condensation.
Aldol condensation involves the reaction between two carbonyl compounds, typically aldehydes or ketones, where one molecule undergoes an enolate formation and attacks another carbonyl compound, forming a β-hydroxy ketone or aldehyde, which can then undergo dehydration.

Step 2: Analyzing the options.
(A) Acetone: Acetone (CH\(_3\)COCH\(_3\)) is a ketone and will undergo aldol condensation when treated with a base.
(B) Benzophenone: Benzophenone (C\(_6\)H\(_5\)COC\(_6\)H\(_5\)) does not undergo aldol condensation because it lacks an alpha-hydrogen required for enolate formation.
(C) Acetaldehyde: Acetaldehyde (CH\(_3\)CHO) will undergo aldol condensation because it contains alpha-hydrogens.
(D) Acetophenone: Acetophenone (C\(_6\)H\(_5\)COCH\(_3\)) will undergo aldol condensation because it has an alpha-hydrogen.

Step 3: Conclusion.
Benzophenone does not undergo aldol condensation, corresponding to option (B).