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  4. Which one of the following is NOT formed when a mixture of methyl bromide and bromo benzene is heated with sodium metal in the presence of dry ether ?

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Q. Which one of the following is NOT formed when a mixture of methyl bromide and bromo benzene is heated with sodium metal in the presence of dry ether ?

KCETKCET 2012Hydrocarbons

Solution:

This is an example of Wurtz Fittig reaction .

$\underset{\text{methyl bromide}}{{CH_3-Br}}+2na+\underset{\text{methyl bromide}}{{Br-CH_3}} \xrightarrow{\text{Ether}} \underset{\text{ethane}}{{CH_3-CH_3}}+2NaBr$

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Propane cannot be prepared from this reaction .