Question Detail

CHM 102 Alkynes: Structure, Bonding, and Nomenclature Objective Question
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Question

What is the product of the reaction of ethylmagnesium bromide (CH3CH2MgBr) with propyne?
Options
A No reaction
B Methane + CH3CH2C≡CMgBr
C Ethane + CH3C≡CMgBr
Correct Answer
D 1-Butyne
Correct Answer

Option C is the correct answer.

Detailed Explanation

Grignard reagents are strong bases; they deprotonate terminal alkynes to form acetylide magnesium salts and release the corresponding alkane (ethane from ethyl Grignard).

Hint

Terminal alkyne H is acidic enough to be removed by RMgX.

Question Info

Course: CHM 102
Topic: Alkynes: Structure, Bonding, and Nomenclature
Type: Objective
Difficulty: Not specified
Question 212 of 1999
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