Question

Which of the following is an example of aryl alkyl halide?
a.) P-chlorotoluene
b.) Chlorobenzene.
c.) Allyl chloride
d.) Benzyl chloride

Answer 1

Hint: Aryl group refers to the functional group attached to the aromatic ring of carbon, for example, toluene. An aryl alkyl halide is a compound that consists of an alkyl group (-R) and a halogen attached to an aromatic compound.

Complete step by step answer:
An aryl halide is formed when the hydrogen atom(s) bonded to the benzene ring are replaced by a halogen atom. This can happen by direct halogenation reaction. When a halogen reacts with benzene ring forming halogen benzene, as shown below:

This reaction occurs in presence of sunlight or under high temperatures.
When an alkyl halide reacts with the aryl group, it forms an aryl alkyl halide.
Halogens are elements belonging to the halo family. These elements contain Fluorine, Chlorine, Bromine, and Iodine.
- If we look at the structure of P-chlorotoluene

It does contain a halogen, an aryl group, and an alkyl group, but it cannot be called an aryl alkyl halide because no alkyl halide is present.
- Looking at the structure of chlorobenzene

It does contain a halogen group and an aromatic ring, but it does not contain any alkyl group. Thus, it cannot be considered as an aryl alkyl halide.
- Now, if we look at the structure of allyl chloride

There are no alternate double bonds, which signifies that it is not an aromatic compound. Thus, it cannot be classified as an aryl alkyl halide.
In benzyl chloride,

It consists of an aromatic ring and an alkyl halide group. Thus, it can be classified as an aryl alkyl halide.

Note: An alkyl halide means that the halogen group is attached to the Alkyl group. If the halogen group is attached directly to the aromatic ring then it will be called an aryl halide and not an aryl alkyl halide.