Question
How would you convert:
(a) Ethene into 1, 2 - dibromoethane.
(b) Ethene to bromoethane

Answer

(a) Ethene into 1,2-Dibromoethene:
when bromine gas is passed into inert solvent like $CCl _4$ Containing dissolved ethene at room temperature, one molecule of $Br _2$ adds across the double bond togive ethylene dibromide.
$
CH _2= CH _2+ Br \longrightarrow CH _2 Br - CH _2 Br
$
(b) Ethene to bromoethane:
Ethene reacts with halogen acids to form alkyl halidies.
$
CH _2= CH _2+ HBr \longrightarrow CH _3- Ch _2 Br
$

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