1.

Write the equations for the preparation of 1-iodobutane from (i) 1-butanol (ii) 1-chlorobutane (iii) but-1-ene.

Answer»

Solution :(i) `underset("1-Butanol")(CH_(3)CH_(2)CH_(2)CH_(2)OH) OVERSET(P+I_(2))to underset("1-Iodobutane")(CH_(3)CH_(2)CH_(2)CH_(2)I)`
(ii) `underset("1-Chlorobutane")(CH_(3)CH_(2)CH_(2)CH_(2)CL) underset(("Finkelstein REACTION"))overset("KI?acetone, "DELTA)to underset("1-Iodobutane")(CH_(3)CH_(2)CH_(2)CH_(2)I)`
(iii) `underset("But-1-ene")(CH_(3)CH_(2)CH=CH_(2)) underset("Anti-Mark. addn.")overset("HBr, PEROXIDE")to underset("1-Bromobutane")(CH_(3)CH_(2)CH_(2)CH_(2)Br) underset(("Finkelstein reaction"))overset("KI/acetone, "Delta)to underset("1-Iodobutane")(CH_(3)CH_(2)CH_(2)CH_(2)I)`


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