Haloalkanes undergo nucleophilic substitution reaction whereas haloarenes undergo electrophilic substitution reaction. Comment.

Haloalkanes undergo nucleophilic substitution reaction whereas haloare

1.	Haloalkanes undergo nucleophilic substitution reaction whereas haloarenes undergo electrophilic substitution reaction. Comment.
Answer» Solution :(i) Haloalkanes undergo nucleophilic substitution reaction due to high electronegativity of the halogen ATOM, the C-X bond in haloalkenes is SLIGHTLY polar, thereby the C-atom acquires a POSITIVE CHARGE. (ii) Hence, the C-atom is good target for attack by nucleophiles. therefore, the X-atom of the haloalkane is replaces by a nucleophile. (iii) On the other hand in haloarenes, the halogen atom releases electron to the benzene nucleus relatively electron-rich with respect to halogen atom. as a result, the electrophile attacks at ortho and para position. hence haloarenes readily undergo ELECTROPHILIC substitution reaction.