Hydrocarbons Question 27

Question: When butene-1 is mixed with excess of bromine, the expected reaction product is [CPMT 1974; BHU 1980]

Options:

A) 1, 2-dibromobutane

B) 1, 1-dibromobutane

C) 2, 2-dibromobutane

D) Perbromobutane

Show Answer

Answer:

Correct Answer: A

Solution:

$ CH_3-CH_2-CH=CH_2+Br_2\to \underset{1,2\text{-dibromo butane}}{\mathop{CH_3-CH_2-\underset{\underset{Br}{\mathop{|}}}{\mathop{CH}}-\underset{\underset{Br}{\mathop{|}}}{\mathop{CH_2}}}} $