Question

The most suitable reagent(s) required to prepare 1-iodobutane from but-1-ene is/are ____________.

Options

• Raney Ni, Δ

• HI in the presence of (C₆H₅CO)₂O₂

• I₂ in HIO₃

• HBr in the presence of (C₆H₅CO)₂O₂ and NaI in dry acetone

Answer 1

The most suitable reagent(s) required to prepare 1-iodobutane from but-1-ene is/are HBr in the presence of (C₆H₅CO)₂O₂ and NaI in dry acetone.

Explanation:

\[\ce{\underset{But-1-ene}{H2C = CH - CH2} - CH3 + HBr ->[(C6H5CO)2O2] \underset{1-Bromobutane}{Br - CH2 - CH2 - CH2} - CH3}\]

\[\ce{\underset{1-Bromobutane}{Br - CH2 - CH2 - CH2} - CH3 + NaI ->[Dry acetone] \underset{1-lodobutane}{I - CH2 - CH2 - CH2} - CH3 + NaBr}\]