Question

Which of the following reagents is used for the following conversion?

\[\ce{CH3 - CH = CH - CHO -> CH3 - CH = CH - CH2OH}\]

Options

• LiAIH₄

• Zn-Hg/HCI

• H₂/Ni

• H₃O⁺

Answer 1

LiAIH₄ 

Explanation:

LiAIH₄ reagent is used for this conversion.

\[\ce{CH3 - \underset{\text{2-butanal}}{CH = CH} - CHO ->[LiAlH4] CH3 - \underset{\text{But 2·ene·1 ol}}{CH=CH -}CH2OH}\]

It works as a diluting agent. It works as a selective reducing agent, converting aldehyde to primary alcohol while leaving the double bond alone.