Explain mechanism of chlorination of methane.

1.	Explain mechanism of chlorination of methane.
Answer» The mechanism involves three steps: (1) Initiation: A chlorine molecule absorbs energy from sunlight to form free radicals. (2) Propagation: A chlorine free radical reacts with methane forming a HCl and methyl free radical. CH₄ + Cl^• → CH₃^• + HCl (b) The methyl free radical attack chlorine molecule forming a methyl chloride and chlorine free radical CH₃^• + Cl₂ → CH₃Cl + Cl Termination: The two free radical combines to form product. Cl^• + Cl^• → Cl (Chlorine) CH₃^• + CH₃^•→ C₂H₆ (Ethane) CH₃^• + Cl^• → CH₃Cl (Methyl Chloride)

Answer»

The mechanism involves three steps:

(1) Initiation: A chlorine molecule absorbs energy from sunlight to form free radicals.

(2) Propagation: A chlorine free radical reacts with methane forming a HCl and methyl free radical.

CH₄ + Cl^• → CH₃^• + HCl

(b) The methyl free radical attack chlorine molecule forming a methyl chloride and chlorine free radical

CH₃^• + Cl₂ → CH₃Cl + Cl

Termination: The two free radical combines to form product.

Cl^• + Cl^• → Cl (Chlorine)

CH₃^• + CH₃^•→ C₂H₆ (Ethane)

CH₃^• + Cl^• → CH₃Cl (Methyl Chloride)

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