Why are para positions more acidic?
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Why are para positions more acidic?
Intramolecular H bonding abcent in para form so removal of H+is easy hence more will be acidity. The electron-withdrawing resonance effect of the NO2 group is very much more when it is in the ortho or para position, and in addition it will also have inductive electron-withdrawing effect.
Why is P-nitrophenol more acidic than P methyl phenol?
P-Nitrophenol is more acidic than p-methyphenol because P-Nitrophenol has electron with drawing group. Which is more effective while P-methylphenol has methoxy group.
Why are alcohols more acidic than phenols?
Phenols are much more acidic than alcohols because the negative charge in the phenoxide ion is not localized on the oxygen atom, as it is in an alkoxide ion, but is delocalized-it is shared by a number of carbon atoms in the benzene ring.
Which is more acidic ortho or para phenol?
Between Ortho and para nitrophenol,para is more acidic as after removal of H+ it’s conjugate base stabilized by intermolecular hydrogen bonding whereas in Ortho there is intramolecular hydrogen bonding that locks hydrogen of OH in phenol making it’s removal difficult as H+.
Why P methyl phenol is less acidic than phenol?
Resonance in phenol: Phenol is less acidic as compared to the above two because no electron withdrawing group is present and there is no inductive or resonance effect. Methyl phenol shows the electron donating inductive effect, hence it is least acidic among the following.
Is phenol less acidic than O nitrophenol?
Presence of these groups at ortho or para positions of phenol decreases the acidic strength of phenols. So, phenol is less acidic than o – nitrophenol.
Why phenols are more acidic than alcohols and water?
Phenols have unique properties and are not classified as alcohols. They have higher acidities due to the aromatic ring’s tight coupling with the oxygen and a relatively loose bond between the oxygen and hydrogen.
Why phenols are more acidic than alcohols give two reactions to show that phenols are acidic in nature?
The acidic nature of phenol can be represented by the following two reactions: (i) Phenol reacts with sodium to give sodium phenoxide, liberating H2. (ii) Phenol reacts with sodium hydroxide to give sodium phenoxide and water as by-products. The acidity of phenol is more than that of ethanol.
Is O nitro phenol more acidic than phenol?
The phenols, when they lose a proton, form the phenoxide ion. The negative charge present on the phenoxide ion will undergo resonance and is therefore very stable.