Question

Convert 1 butyne in to 2 butyne

Answer 1

Answer:

How do we perform the isomerisation of 1-butyne to 2-butyne using NaNH2? As a first step, I think that NH2− would remove H+ from the third carbon to give an allene intermediate. But I don't know how to proceed after that. Please explain the other steps.

Answer 2

1 - Butyne ( CH$_{3}$ −CH$_{2}$−C≡CH ) can be converted into 2 - Butyne ( CH$_{3}$ −C≡C−CH$_{3}$   ) by following step of reaction -

React 1 - Butyne ( CH$_{3}$ −CH$_{2}$−C≡CH ) with ethanolic potassium hydroxide ( KOH ) , 2 - Butyne ( CH$_{3}$ −C≡C−CH$_{3}$   ) is formed .

The chemical reaction is as follows -

CH$_{3}$ −CH$_{2}$−C≡CH  + ethanolic KOH  →  CH$_{3}$ −C≡C−CH$_{3}$  

• ​ At standard temperature and pressure , 2 - Butyne is a volatile , colorless and pungent liquid .
• The molar mass of 2 - Butyne is 54.0904 g / mol .