Question

The major product obtained in the reaction of 1,3-Butadiene with HCl (1 mole) at a higher temperature (${100}^{o}C$ or above) is:

• A. 3,4-dichloro-1-butene
• B. 3-chloro1butene
• C. 1-chloro-2-butene
• D. 2-chloro-2-butene

Answer 1

Answer: (C)

1-chloro-2-butene

The major product obtained in the reaction of 1,3-Butadiene with HCl (1 mole) at a higher temperature (100oC or above) is 1-chloro-2-butene. This is an example of 1,4-addition reaction in which C=C double bond undergoes rearrangement.