Question Detail

CHM 102 Practice Questions Objective Question
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Question

Which of the following compounds will react with PCl5 least vigorously?
Options
A Ethanol
B Acetic acid
C Phenol
Correct Answer
D Benzoic acid
Correct Answer

Option C is the correct answer.

Detailed Explanation

Phenol reacts least vigorously with PCl5 because the C-O bond in phenol has partial double bond character due to resonance (lone pair on oxygen delocalized into the ring), making it stronger and less reactive.

Hint

Which compound has a C-O bond stabilized by resonance?

Question Info

Course: CHM 102
Topic: Practice Questions
Type: Objective
Difficulty: Not specified
Question 1737 of 1999
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