Show how you can make these compounds from but-1-yne.
(i) 1,2-dibromobut-1-ene
(ii) 1-bromobut-1-ene
(iii) 2-bromobut-1-ene

Reaction scheme for anti Markovnikov addition of Br to but-1-yne, producing dibromobut-1-ene.

Reaction scheme for anti Markovnikov addition of Br and water to but-1-yne, yielding dibromobut-1-ene.

Reaction scheme for anti Markovnikov addition of HBr to but-1-yne, producing dibromobut-1-ene.

Reaction scheme for anti Markovnikov addition of NBS to but-1-yne, yielding dibromobut-1-ene.

Show how you can make these compounds from but-1-yne.(i) 1,2-dibromobut-1-ene(ii) 1-bromobut-1-ene(iii) 2-bromobut-1-ene