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Which reagent is used to convert an alkene (R–CH=CH₂) into a trialkylborane intermediate?

1. Diborane (B₂H₆)
2. Hydrogen peroxide (H₂O₂)
3. Sodium hydroxide (NaOH)
4. Sodium hydroxide (NaOH)

Correct answer: Diborane (B₂H₆)

Solution

The question seems to involve the hydroboration-oxidation reaction, where diborane (B₂H₆) is used to add across the double bond. This is a common reaction for alkenes.

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