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Tertiary butyl benzene does not give ben...

Tertiary butyl benzene does not give benzoic acid when oxidised with `KMnO_(4)`. Why?

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In order than an alkyl group attached to benzene ring may be oxidised to carboxyl group, the presence of atleast one `prop-hydrogen is necessary. For example, toluene is oxidised to benzoic acid. But tertiary butyl benzene has no `prop-hydrogen` atom. It is therefore, not oxidised to benzoic acid.
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