Question

What happen when CH3Br react with aq. NaOH *

Answer 1

The reaction of methyl bromide and aqueous sodium hydroxide is an example of a bimolecular nucleophilic substitution reaction ( S N 2)

In this case the neucleophile is the hydroxide ion and the positive centre which the hydroxide ion attacks is the electron deficient carbon attached to the bromine atom in methyl bromide. e.g.

The C— Br bond is broken as the OH −  ion bonds with the CH 3 — group, releasing a bromide ion. The reaction products are therefore methyl alcohol and aqueous sodium bromide;-

Answer 2

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