Question

For the given reaction the possibility of a substitution versus no reaction must be considered. If a substitution is predicted will it take place by a ${SN}_1$ or a ${SN}_2$ mechanism? If chiral centres are present will the configuration change.

Answer 1

This reaction occurs by $S{N}_2$ reaction with inversion of configuration.

Here nucleophilic $N_3^{-}$ is strong nucleophile and favour $S{N}_2$ reaction.