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Write the equations for the preparation ...

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

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(a) `underset("Butan-1-ol")(CH_(3)CH_(2)CH_(2)CH_(2)OH) overset(I_(2), P)to CH_(3)CH_(2)CH_(2)CH_(2)I`
(b) `underset("1-Chlorobutane")(CH_(3)CH_(2)CH_(2)CH_(2)Cl) underset("Acetone")overset(NaI)to CH_(3)CH_(2)CH_(2)CH_(2)I`
(c) `underset("But-1-ene")(CH_(3)CH_(2)CH=CH_(2)) underset("Peroxides")overset(HBr)to CH_(3)CH_(2)CH_(2)CH_(2)Br underset("Acetone")overset(NaI, "heat")to CH_(3)CH_(2)CH_(2)CH_(2)I`
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