Why do electron-withdrawing groups increase acidity of phenol?
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In case of substituted phenols, acidity of phenols increases in the presence of electron withdrawing group. This is due to the stability of the phenoxide ion generated. ... This is due to the fact that the negative charge in phenoxide ion is mainly delocalized at ortho and para positions of the attached benzene ring.
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In phenol the H connected with O is acidic and behaves as H+
If electron withdrawing groups are there , the acidity will increase because more electrons will be withdrawn from H and it will behave more easily as H+ as it will have lesser electrons towards it and more will be shifted towards O due to electron withdrawing groups.
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