explain how does the -oh group attached to carbon of benzene ring activate it towards electrophilic substitution?

Asked by ATUL raizada | 23rd Aug, 2012, 10:24: PM

Expert Answer:

The -OH group shows +M 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. The substitution is favored more at ortho and para positions. 

Answered by  | 24th Aug, 2012, 06:12: PM

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