Aryl Halides and Phenols - Result Question 47
####51. Give reason in one or two sentences for the following: " $o$-nitrophenol is steam volatile whereas $p$-nitrophenol is not."
$(1985,1 M)$
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Solution:
- Intramolecular H-bonding in ortho-nitrophenol lowers its boiling point. No such intramolecular H-bonding is possible with $p$-nitrophenol and rather it is associated together by intermolecular $H$-bonding which increases the boiling point.
ortho-nitrophenol
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