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Exercises: Radical substitution - mechanism

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Fig.1

Exercise

Which of the following steps are individual steps of the radical chlorination of methane?

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Chain propagation.

Chain initiation.

Chain reaction.

Final reaction.

Chain termination.

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Exercise

Which reaction mechanism shows the chlorination of methane?

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An aromatic substitution mechanism.

A radical chain reaction mechanism.

A cyclic substitution mechanism.

A nucleophilic substitution mechanism.

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Exercise

If a chain reaction is initiated once, ...

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...it can proceed for a while through the continuous repetition of the chain propagation cycle. A termination of the chain reaction occurs, for example, when two radicals recombine by forming a covalent bond and are thus eliminated from the cycle.

... it can proceed for a short amount of time by repeating the chain propagation cycle up to two times. A termination of the chain reaction occurs only when two phenyl radicals recombine by forming a covalent bond and are thus eliminated from the cycle.

... it can never be terminated.

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