Question

Explain the following: Chlorobenzene (a haloarene) is extremely less reactive towards a nucleophilic substitution reaction than chloroethane (a haloalkane).

Answer 1

1) UNSTABILITY OF PHYNILE CATION.

2)HYBRIDISATION OF CARBON  IS SP2 WHICH IS HIGHER ELECTRONEGETIVE THEN SP3 BOND LENGTH IS SHORTER AND STRONGER.

3)POSSIBLE REPELTION OF NUCLIOPHILE FROM ELECTRON RICH BENZENE RING.

4)PARTIAL DOUBLE BOND CHARACTER.