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Chemical Properties of Aromatic Compounds

Arrange the f...

Question

Arrange the following in the order of reactivity towards an electrophilic attack

V > IV > III > II > I

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III > V > IV > II > I

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III > IV > V > II > I

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V > IV > III > I > II

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Solution

The correct option is B III > V > IV > II > I
Reactivity towards electrophilic substituion reaction depends upon stability of arenium ion intermediate. Stability of arenium ion increases in the presence EDG group (causing +R, +I, H) and decreases in the presence of EWG (causing -R, -I). Hence, the correct order will be III > V > IV > II > I

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