Cosider the following transformations
`CH_(3)CH=CHCHOoverset(KiAlH_(4))underset(Et_(2)O)(rarr)Aoverset(H_(2)O)(rarr)B`
The fianl product `(B)` is

Options

A. `CH_(3)CH_(2)CH_(2)CH_(3)`
B. `CH_(3)CH=CHCH_(2)OH`
C. `CH_(3)CH=CHCH_(3)`
D. `CH_(3)CH_(2)CH_(2)CH_(2)OH`

Answer

B

Explanation

`LiAlH_(4)` reduces the aldehyde to primary alcohol but does not reduce the carbon-carbon double bond because it reduces the compound by transfering hydrid ion (nucleophile) while alkenes do not undergo nucleophilic addition reactions unlike aldehydes and ketones.
`4CH_(3)CH=CHCHOoverset(LiAlH)underset(Et_(2)O)(rarr)
`[(CH_(3)CH=underset((A))(CHCH_(2))O)_(4)Al]Lioverset(H_(3)O^(+))(rarr)underset((B))(4CH_(3)CH=CHCH_(2)OH)`