Chemistry, asked by shubhangi63, 1 year ago

discuss the mechanism of chorinstiom of methane.

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Answered by karthiklikith
3
The chain mechanism is as follows, using the chlorination of methane as a typical example: 1. Initiation: Splitting or homolysis of achlorine molecule to form two chlorine atoms, initiated by ultraviolet radiation or sunlight. Achlorine atom has an unpaired electron and acts as a free radical.
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shubhangi63: can u explain with that diagram
Answered by Anonymous
1
HERE IS YOUR ANSWER,

The reaction we are going to explore is a more gentle one between methane and chlorine in the presence of ultraviolet light - typically sunlight.(This is a good example of a photochemical reaction - a reaction brought about by light.)

CH4+Cl2→CH3Cl+HCl

The organic product is chloromethane. One of the hydrogen atoms in the methane has been replaced by a chlorine atom, so this is a substitution reaction.

The Mechanism
The mechanism involves a chain reaction. During a chain reaction, for every reactive species you start off with, a new one is generated at the end - and this keeps the process going. The over-all process is known as free radical substitution, or as a free radical chain reaction.

Chain initiation: The chain is initiated (started) by UV light breaking a chlorine molecule into free radicals.
Cl2 →→ 2Cl

Chain propagation reactions : These are the reactions which keep the chain going.
CH4 + Cl→→CH3 + HCl

CH3 + Cl2→→CH3Cl + Cl

Chain termination reactions: These are reactions which remove free radicals from the system without replacing them by new ones.
2Cl→→Cl2

CH3 + Cl →→ CH3C l

CH3 + CH3→→CH3CH3

HOPE IT HELPS..
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