Question

Write the reaction of ethene with bromine.

Answer 1

When ethene reacts with bromine (usually dissolved in carbon tetrachloride), an addition reaction takes place, forming 1,2-dibromoethane and discharging the reddish-brown colour of bromine.

\[ \text{CH}_2 = \text{CH}_2 + \text{Br}_2 \longrightarrow \text{CH}_2\text{Br} - \text{CH}_2\text{Br} \]