Question

Explain (+ R) effect with respect to phenol. ​

Answer 1

Answer:

In phenol, the -OH group shows +M or +R effect due to delocalization of lone pair on oxygen atom towards the ring. ... Hence phenol is more reactive towards electrophilic substitution reactions. The substitution is favored more at ortho and para positions. The -NH2 group in aniline also exhibits +R effect.

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Answer 2

Answer:

In phenol, the -OH group shows +M or +R effect due to delocalization of lone pair on oxygen atom towards the ring. Thus the electron density on benzene ring is increased particularly on ortho and para positions. Hence phenol is more reactive towards electrophilic substitution reactions.