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The major product [B] in the following sequence is : CH3—C—CH—CH2CH3 | CH(CH3)2 (i) B2H6 (ii) H2O2, OH- [A] dil. H2SO4 Δ [B]

1. CH3—CH—CH=CH—CH3 | CH(CH3)2
2. CH3—C—CH2CH2CH3 | CH(CH3)2
3. CH2=C—CH2CH2CH3 | CH(CH3)2
4. CH3—C—CH2CH2CH3 || C / \ H3C CH3

Correct answer: CH3—CH—CH=CH—CH3 | CH(CH3)2

Solution

The correct option represents the product of a hydroboration-oxidation reaction, where the alkene is formed through the addition of borane followed by oxidation, leading to the formation of a double bond between the appropriate carbon atoms while maintaining the branching from the isopropyl group.

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