# Why are diazonium salts used for nucleophilic substitutions?

Sep 3, 2016

The dinitrogen group is of course a superb leaving group.

#### Explanation:

$R - {N}^{+} \equiv N + {X}^{-} \rightarrow R - X + N \equiv N \uparrow$

The formation of a diazonium salt from nitrobenzene and nitrous acid is a little bit more tricky but still doable.