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Which of the following reagents convert propene to 1-propanol?

1. H2O, H2SO4
2. aqueous KOH
3. MgSO4, NaBH4/H2O
4. B2H6, H2O2, OH−

Correct answer: B2H6, H2O2, OH−

Solution

The hydroboration-oxidation reaction using B2H6 followed by H2O2 and OH− adds water across the double bond of propene in an anti-Markovnikov manner, yielding 1-propanol.

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