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Which of the above two compounds will sh...

Which of the above two compounds will show higher melting point?

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Compound II (p-nitrophenol) has higher boiling point. In p-nitrophenol, molecular association takes place due to extensive hydrogen bonding between the molecules intermolecular hydrogen bonding). Due to the intermolecular hydrogen bonding more energy needs to be supplied to vaporise the compound. Therefore, it has higher melting and boiling points. In compound I (o-nitrophenol) the intramolecular hydrogen bond results in the cyclisation of the molecule and prevents their association. Consequently less energy needs to be supplied to vaporise the compound .
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