General Organic ChemistryHard

Question

Identify the correct order of reactivity in electrophilic substitution reactions of the following compounds :

     1            2            3           4

Options

A.1 > 2 > 3 > 4
B.4 > 3 > 2 > 1
C.2 > 1 > 3 > 4
D.2 > 3 > 1 > 4

Solution

Any electron donating group, when attached to benzene fing will activate it towards E+ - subatitution . On contrary electron with drawing droups will deactivate it towards E+ - subatitution

Because - CH3 is electron donating (So activating) gp. while - Cl and - NO2 are electron withdrawing. Also effect of - NO2 is more than.

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