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Q.

How many of the following compounds do not undergo Friedel craft's reactions

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a

b, c, d only

b

a, e only

c

a, b only

d

a, b, c, d, e

answer is C.

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Detailed Solution

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In Friedel Craft's reaction aniline forms complex salt with lewis acids, in which partial positive charge on nitrogen deactivate towards ESR.

similarly, phenol form complex salt with lewis acids, In which partial positive charge on oxygen deactivate towards ESR

-NO2 , -CHO, -COOH . . .highly deactivating groups do not undergo Friedel craft's reactions.

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