Question

How would you prepare (2)

i) 1,2-dibromobutane from 1-butyne,

Answer 1

Answer:

Explanation:

i) 1,2-dibrombutane from 1-butyne

Answer 2

First we treat the given compound with H2 in the presence of lindlar catalyst which will increase the activation energy, after this first reaction, the triple bond in the given compound will be converted to a double bond and the compound will be named as 1-Butene. Finally, we treat 1-Butene with Br2 with CCl4 This reaction will end up in our desired compound that is 1,2-dibromobutane. These reactions are quite common in formation of haloalkanes from unsaturated compounds.