Which of the following alkenes give an alcohol of the same constitution by BH3.THF then H2O2/NaOH as by Hg(OAc)2/H2O then NaBH4?

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JEE Advanced levelOne or more correct optionsDifficulty 3 of 3o2215

Which of the following alkenes give an alcohol of the same constitution by $BH X_{3} \cdot THF$ then $H X_{2} O X_{2} / NaOH$ as by $Hg (OAc) X_{2} / H X_{2} O$ then $NaBH X_{4}$ ?

Apropene
Btrans-but-2-ene
C1-methylcyclohexene
Dcyclohexene

Answer: B, D

Symmetrical alkenes have identical carbons at the double bond, so regiochemistry does not matter. Cyclohexene gives cyclohexanol and but-2-ene gives butan-2-ol by both. Propene and 1-methylcyclohexene give different regioisomers.

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Which of the following alkenes give an alcohol of the same constitution by BHX3​⋅THF then HX2​OX2​/NaOH as by Hg(OAc)X2​/HX2​O then NaBHX4​?

Answer: B, D

More questions on Hydroboration, oxymercuration, halohydrin formation

Which of the following alkenes give an alcohol of the same constitution by $BH X_{3} \cdot THF$ then $H X_{2} O X_{2} / NaOH$ as by $Hg (OAc) X_{2} / H X_{2} O$ then $NaBH X_{4}$ ?