Question

The major product of the following reaction is CH₂ = CH - CH₂ - OH product

• A. CH₃ - CHBr - CH₂Br
• B. CH₂ = CH - CH₂Br
• C. CH₃ - CHBr - CH₂ - OH
• D. CH₃ - CHOH - CH₂OH

Answer 1

The Correct Option is A

In the given reaction, the alkene reacts with excess HBr, leading to an electrophilic addition.

• The double bond in \( \text{CH}_2 = \text{CH} - \text{CH}_2 - \text{OH} \) breaks and the hydrogen from HBr adds to the most substituted carbon (according to Markovnikov's rule).
• The bromine atom (Br⁻) adds to the other carbon.
• Since there is excess HBr, both carbons of the double bond will be attached to bromine atoms, leading to the major product being a dibromide.

The correct answer is (A) : CH₃ - CHBr - CH₂Br.