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प्रश्न
Ortho and para nitrophenols are more acidic than phenol. Draw the resonance structures of the corresponding phenoxide ions.
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उत्तर
Resonance structures of o-nitrophenoxide ion
Resonance structures of p-nitrophenoxide ion
Resonance structures of phenoxide ion
In substituted phenols, electron withdrawing groups such as nitro group increase the acidic strength of phenol. This effect becomes more potent when such groups are present at ortho and para positions. This is because of the effective delocalisation of the anion of the phenoxide ion. Hence, o- and p-nitrophenols are more acidic than phenol.
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संबंधित प्रश्न
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(iii) NaBH4
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Write the mechanism of acid-catalysed dehydration of ethanol to yield ethene.
Write the mechanism of acid dehydration of ethanol to yield ethene.
