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NEET levelSingle correct optionDifficulty 1 of 3hc057

Which reagent combination converts propene into propan-1-ol as the major product?

ADilute $H X_{2} SO X_{4}$ , warm, then water
B(i) $BH X_{3}$ in THF; (ii) $H X_{2} O X_{2}$ , $NaOH$
C(i) $Hg (OAc) X_{2}$ , $H X_{2} O$ ; (ii) $NaBH X_{4}$
DCold dilute alkaline $KMnO X_{4}$

Answer: B

Hydroboration-oxidation gives anti-Markovnikov hydration: boron goes to the terminal carbon, and oxidation replaces B by OH, giving propan-1-ol. Acid hydration and oxymercuration-demercuration are Markovnikov and give propan-2-ol, while cold alkaline permanganate gives propane-1,2-diol.

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