[R is alkyl group) decreasing order of inductive effect is
AIEEE Solved Paper-2002
A) \[{{(C{{H}_{3}})}_{3}}C->{{(C{{H}_{3}})}_{2}}CH->C{{H}_{3}}C{{H}_{2}}-\]
B) \[C{{H}_{3}}C{{H}_{2}}->{{(C{{H}_{3}})}_{2}}CH->{{(C{{H}_{3}})}_{3}}C-\]
C) \[(C{{H}_{3}}){{ }_{2}}CH->C{{H}_{3}}C{{H}_{2}}->{{(C{{H}_{3}})}_{3}}C-\]
D) \[(C{{H}_{3}}){{ }_{2}}C->C{{H}_{3}}C{{H}_{2}}->{{(C{{H}_{3}})}_{3}}CH-\]
Correct Answer: A
Solution :
Both where R is attached to vinylic (\[\approx \]arylic) system Positive inductive effect occurs in the following order \[(C{{H}_{3}}-{{ & }_{3}})C->{{(C{{H}_{3}}-)}_{2}}CH->C{{H}_{3}}C{{H}_{2}}->C{{H}_{3}}-\]
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