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Explain why tert-butylbenzene cannot be ...

Explain why tert-butylbenzene cannot be oxidisd to benzonic acid by treatment with alkaline `KMnO_4`.

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Alkybenzene can be oxidised to benzoic acid provided that the side chain contains atleast one benzylic hydrogen atom. Since tert-butylbenzene does not contain any benzylic hydrogen so the alkyl chain cannot be oxidised to `-COOH` group.
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