Chemistry, asked by zaheenmallick, 8 months ago

increasing order of acidic nature of phenol and No2​

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Answered by Anonymous
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P-nitrophenol> o-nitrophenol > m-nitrophenol.

Nitro group has both M-effect (mesmeric effect) and I-effect (inductive Effect) but M-effect predominates over I-effect. NO2 group at o and p position withdraws electron of o-h bond towards it by stronger M-effect while the NO2 group at m position withdraws electron of o-h bond by weaker I -effect . Thus o and p are nitrophenols are more acidic than m-nitrophenol.

However o-nitrophenol is little less acidic than p-nitrophenol due to intramolecular h-bonding which makes loss of proton little more difficult... So, p-nitrophenol is strongest.

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