Alcohols, Phenols and Ethers

Question

Which of the following isomers is more volatile: o-nitrophenol or p-nitrophenol?

Answer

In o-nitro phenol, -OH is linked to –NO2 by means of intramolecular H-bonding so, it is highly volatile.

 Explanation:

Stronger intermolecular forces would make the substance less volatile. So we can see intermolecular H-bonding in P-nitro phenol, so P-nitro phenol is less volatile, where as in o-nitro phenol intra H-bonding takes places that’s why it is highly volatile.

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