Question

In the following benzyl/allyl system R – CH = CH2 and (R is alkyl group) Then decreasing order of inductive effect is :

• A. (CH3)3 C— > (CH3)2CH— > CH3CH2—
• B. CH3CH2— > (CH3)2CH— > (CH3)3C—
• C. (CH3)2CH— > CH3CH2— > (CH3)3C—
• D. (CH3)3C— > CH3CH2— > (CH3)2CH—

Answer 1

Answer: (A)

(CH3)3 C— > (CH3)2CH— > CH3CH2—

Answer 2

CH3 group has + I effect, as number of – CH3 group increases the inductive effect increases.