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  • Please help! - Some Basic Principles of Organic Chemistry - JEE Main

Arrangement of   (CH_{3})_{3}C-, (CH_{3})_{2}CH-,  CH_{3}CH_{2}-, when attached to benzyl or an unsaturated group in increasing order of inductive effect is

  • Option 1)

     \dpi{100} (CH_{3})_{3}C-< (CH_{3})_{2}CH- < CH_{3}CH_{2}-    

  • Option 2)

    CH_{3}CH_{2}-< (CH_{3})_{2}CH- < \dpi{100} (CH_{3})_{3}C-

  • Option 3)

    (CH_{3})_{2}CH- < \dpi{100} (CH_{3})_{3}C-< CH_{3}CH_{2}-

  • Option 4)

    \dpi{100} (CH_{3})_{3}C-  < CH_{3}CH_{2}-   < (CH_{3})_{2}CH-

 

Answers (2)

best_answer

As we learnt in 

Inductive effect -

Displacement of \sigma electron towards more electronegative atom is called inductive effect

- wherein

It is a permanent effect

 

 Larger the size of alkyl group higher will be the inductive effect.

order of inductive effect is 

CH_{3}CH_{2}-< (CH_{3})_{2}CH- < \dpi{100} (CH_{3})_{3}C-


Option 1)

 \dpi{100} (CH_{3})_{3}C-< (CH_{3})_{2}CH- < CH_{3}CH_{2}-    

This option is incorrect

Option 2)

CH_{3}CH_{2}-< (CH_{3})_{2}CH- < \dpi{100} (CH_{3})_{3}C-

This option is correct

Option 3)

(CH_{3})_{2}CH- < \dpi{100} (CH_{3})_{3}C-< CH_{3}CH_{2}-

This option is incorrect

Option 4)

\dpi{100} (CH_{3})_{3}C-  < CH_{3}CH_{2}-   < (CH_{3})_{2}CH-

This option is incorrect

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