Why is Ortho nitrophenol more acidic than Ortho methoxyphenol?

The nitro-group is an electron-withdrawing group. On the other hand, methoxy group is an electron-releasing group. Thus, it increases the electron density in the O-H bond and hence, the proton cannot be given out easily. For this reason, ortho-nitrophenol is more acidic than ortho-methoxyphenol.

Which is more acidic Ortho?

Thus, ortho and para-nitrophenols are more acidic than m-nitrophenol is a little less acidic than p-nitrophenol because of intramolecular hydrogen bonding which makes the loss of a proton difficult to remove.

Why is Ortho nitrophenol more acidic than meta nitrophenol?

Ortho-nitrophenol is more acidic than meta-nitrophenol because at ortho-position, —NO2 group shows -M-effect also but at meta-position, —NO2 group shows only -I-effect.

Which is more acidic Ortho nitrophenol or 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.

Which is more acidic Ortho methoxyphenol or phenol?

The presence of this group in the ortho position in ortho nitro phenol decreases the electron density in the O−H bond. Thus, it increases the electron density in the O−H bond and hence, the proton cannot be given out easily. Hence, ortho-nitrophenol is more acidic than ortho-methoxyphenol.

Is more acidic than Ortho methoxyphenol Why?

Ortho nitrophenol is more acidic than ortho methoxyphenol because nitro group is an electron withdrawing and it will increase +ve charge on the oxygen atom to make it more acidic whereas OCH3 group is an electron releas1ng group and it will decrease +ve charge on the oxygen atom, thus making it less acidic and hence …

Which is more acidic phenol or Methoxyphenol?

It increases electron density on the benzene ring and does not delocalize negative charge of phenoxide ion. It decreases acidity. So, now we should know that p−methoxyphenol is less acidic than phenol.

Which is more acidic ortho or meta nitrophenol?

The acidic nature of the three nitrophenols increases in the order: meta < ortho < para. Para-nitorophenol is the most acidic among the three. The nitro group attached to a conjugated system shows strong -M effect, and this decreases the electron density more at the ortho and para positions than at the meta position.

Which is more acidic phenol or ortho methyl phenol?

When an H+ ion leaves phenol, it forms a phenoxide ion, and the negative charge in it is delocalised in the ring through resonance. So, it is more acidic than O-methyl phenol and O-methoxy phenol. But the absence of an electron-withdrawing group makes it less acidic than O-nitrophenol. Thus option B is the correct one.

Which is more acidic methoxyphenol or Methylphenol?

Originally Answered: Which one is more acidic p- methoxyphenol or p- methylphenol? Methoxy group has electron withdrawing effect while Methyl group has electron donating effect . So p-methoxy phenol is more acidic than p-methyl phenol.