MCAT Organic Chemistry Question 51: Answer and Explanation

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Question: 51

6. If cinnamaldehyde was treated with LiAlH₄, what reaction would occur?

A. Reduction, resulting in a primary alcohol
B. Oxidation, resulting in a carboxylic acid
C. An acid–base reaction, resulting in a diol
D. No reaction would occur

Correct Answer: A

Explanation:

All that we need to know about cinnamaldehyde is that it is an aldehyde, and therefore will be reduced by a strong reducing agent like LiAlH₄ to a primary alcohol.

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