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Preparation of Alcohols from Grignard Reagents

b What would ...

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(b) What would you see, when ethene is bubbled through a solution of bromine in carbon tetrachloride?

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Solution

When bromine in carbon tetrachloride is added to ethene, the orange colour of the bromine disappears due to the formation of the colourless ethylene bromide.

An addition reaction takes place:

$C H_{2} = C H_{2} + B r_{2} C C l_{4} - -- \to B r - C H_{2} - C H_{2} - B r$
Ethylene Bromide

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What would you see, when ethyne is bubbled through a solution of Bromine in Carbon tetrachloride?

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Preparation of Alcohols from Grignard Reagents

Standard XII Chemistry

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