Hydrocarbons - Result Question 79

####82. Which of the following compounds reacts slower in electrophilic substitution?

[2000]

(a) C6H5NO2

(b) C6H5OH

(c) C6H5CH3

(d) C6H5NH2

Show Answer

Solution:

  1. (a) CH3 and NH2 and OH are electron donating groups, whereas NO2 is an electron withdrawing group and leaves the benzene ring deactivated. Due to stronger electron attracting ( −I effect) effect of NO2 group, C6H5NO2 shows least reactivity towards electrophilic substitution.
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