JEE Main Chemistry question

Chemistry Hydrocarbons JEE Main

Hydroboration–oxidation (BH, then HO/OH) of a methylenecyclopentane-type exocyclic alkene gives, with *syn*, anti-Markovnikov selectivity, the corresponding *trans*-2-methylcyclopentan-1-ol.

(A)The product formed is *trans*-2-methylcyclopentan-1-ol
(B)The product's stereochemistry corresponds to *syn* addition
(C)The addition is *syn* (both H and OH delivered to the same face)
(D)All of the aboveCorrect

Answer: (D)

Solution

Hydroboration adds boron and hydrogen to the same face of the alkene (*syn* addition) with anti-Markovnikov regiochemistry, and the subsequent oxidation retains

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Question ID VK-142832