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What is the thermodynamic product obtain...

What is the thermodynamic product obtained from the addition of 1 mole of HBr to 1,3-butadiene?

A

1-bromo-2-butene

B

3-bromo-1-butene

C

4-bromo-1-butene

D

3-bromo-2-butene

Text Solution

Verified by Experts

The correct Answer is:
A
3-Bromo-1-butene is the kinetic product formed upon reaction of HBr with 1,3-butadiene It is formed by addition of bromide anion to the resonance stabilized allylic carbocation formed by protonation of the diene. However, there is a more stable isomeric product which is the thermodynamic product.
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AAKASH SERIES-HYDROCARBONS-ADDITIONAL PRACTICE SHEET ( LEVEL-I (LECTURE SHEET (MAIN) (STRAIGHT OBJECTIVE TYPE QUESTIONS)))
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