Question

Name the products formed and write an equation when ethyne is added to the following in an inert solvent:

Bromine

Answer 1

Ethyne in an inert solvent of carbon tetrachloride adds bromine to change into 1,2-dibromoethene and then to 1, 1, 2, 2-tetrabromo ethane.

$$\underset{\mathrm{Ethyne}}{\mathrm{C}{\phantom{A}}_2\mathrm{H}{\phantom{A}}_2}\underset{(\mathrm{from}\mathrm{CBr}{\phantom{A}}_4)}{\overset{\mathrm{Br}{\phantom{A}}_2}{\to }}\underset{1,2\text{-}\mathrm{dibromoethene}}{\mathrm{C}{\phantom{A}}_2\mathrm{H}{\phantom{A}}_2\mathrm{Br}{\phantom{A}}_2}\underset{(\mathrm{from}\mathrm{CBr}{\phantom{A}}_4)}{\overset{\mathrm{Br}{\phantom{A}}_2}{\to }}\underset{1,1,2,2\text{-}\mathrm{tetrabromo}\mathrm{ethane}}{\mathrm{C}{\phantom{A}}_2\mathrm{H}{\phantom{A}}_2\mathrm{Br}{\phantom{A}}_4}$$