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Explain whether cationic or anlonic poi...

Explain whether cationic or anlonic poiymerisation takes place in the preparation of acrylonitrile.

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The electronegative -CN group present in acrylonitrile `(CH_2 =CH-CN)` is responsible fo r the increased stability of the carbanion. Since carbanion is formed as an intermediate in both chain initiation and chain propagation, acrylonitrile should be prepared by anionic polymerisation.
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    B
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