Nucleophilic and Electrophilic Substitution in Aryl Halides
are introduce...
Question
are introduced on benzene ring, the correct order of their inductive effect is:
A
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B
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C
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D
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Solution
The correct option is B Permanent polarisation of bond due to shifting of shared pair of sigma electrons towards the more electronegative atom/substituent is known as inductive effect. Permanent shift in electron density from the substituent towards the carbon chain is called +I effect. EDG (electron donating groups) shows +I effect. −CH3 group shows +I effect. As the number of −CH3 group increases, the inductive effect will also increase. Hence, the correct answer is option (b).