The position of the OH resonance of phenol varies with concentration is solution, as the following table shows. On the other hand, the hydroxyl proton of o-hydroxyacetophenone appears at 12.05 ppm and does not show any great shift upon dilution. Explain.

Concentration w/c in CCI ₄ (ppm)

100%.................................................................7.45

20%...................................................................6.75

10%...................................................................6.45

5%.....................................................................5.95

2%.....................................................................4.88

1%.....................................................................4.37

OH Phenol OH o-hydroxyacetophenone