The product formed when toluene is heated in light with `Cl_2` and in absence of halogen carrier is

Options

A. Benzotrichloride
B. Gammexane
C. Chlorobenzene
D. None of these

Explanation

To determine the product formed when toluene is heated in light with Cl2 in the absence of a halogen carrier, we can follow these steps:

### Step 1: Understand the Reaction Conditions
Toluene (C6H5CH3) is an aromatic hydrocarbon. When it is exposed to chlorine gas (Cl2) under UV light, a free radical substitution reaction can occur. The absence of a halogen carrier means that the reaction will proceed via free radical mechanisms rather than electrophilic substitution.

### Step 2: Initiation of the Reaction
In the presence of UV light, Cl2 molecules dissociate into two chlorine radicals (Cl•):
\[ \text{Cl}_2 \xrightarrow{\text{UV light}} 2 \text{Cl}• \]

### Step 3: Formation of Toluene Radicals
The chlorine radicals can abstract a hydrogen atom from toluene, leading to the formation of a toluene radical (C6H5CH2•):
\[ \text{C}_6\text{H}_5\text{CH}_3 + \text{Cl}• \rightarrow \text{C}_6\text{H}_5\text{CH}_2• + \text{HCl} \]

### Step 4: Chlorination of the Toluene Radical
The toluene radical can then react with another chlorine radical to form chlorotoluene:
\[ \text{C}_6\text{H}_5\text{CH}_2• + \text{Cl}• \rightarrow \text{C}_6\text{H}_5\text{CH}_2\text{Cl} \]

### Step 5: Identify the Product
The primary product formed from this reaction is benzyl chloride (C6H5CH2Cl).

### Final Answer
The product formed when toluene is heated in light with Cl2 in the absence of a halogen carrier is benzyl chloride (C6H5CH2Cl).

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