Benzene and Alkyl Benzene - Result Question 10

####14. The compounds P,Q and S

S

were separately subjected to nitration using HNO3/H2SO4 mixture. The major product formed in each case respectively, is

(2010)

(a)

(b)

(c)

(d)

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Solution:

14.

OH is activating while COOH is deactivating group in SEAr reaction. Therefore, electrophile attack to ortho of the activating - OH group.

Both OCH3 and CH3 are activating ortho/para directing groups but OCH3 is stronger activator, electrophile attack to ortho of OCH3.

Ring II is activated while ring I is deactivated in SE Ar reaction. Therefore, electrophile attack at para to ring-II, the less hindered position.



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