Question

Among the following which one has the weakest
carbon halogen bond?
(1) Benzyl bromide
(2) Bromobenzene
(27 Vinyl bromide
(4) Benzyl chloride​

Answer 1

Answer:

Option (1) Benzyl bromide has the weakest carbon-halogen bond.

Reason: After the loss of bromide ion, the cation (benzyl) is stabilised by resonance. Hence, C-Br bond becomes weakest.

Answer 2

Answer:

A

Explanation:

C-X bond in benzyl bromide is more weaker than in vinyl bromide and bromobenzene since the benzyl cation left after the removal of the bromide ion is stabilised by resonance. Further, C−Br is weaker than C−Cl bond because Br is larger in size than Cl, hence C−Br bond length is weaker. Therefore, C6H5CH2Br has the weakest C−X bond.