A) \[+\,l\]effect stabilizes a carbanion
B) \[+\,\,l\] effect stabilizes a carbocation
C) \[-\,\,l\] effect stabilizes a carbanion
D) \[-\,\,l\]effect stabilizes a carbocation
Correct Answer: B
Solution :
Positive inductive effect (\[+\,l\]effect) is arises due to electron releasing group (y). It develops negative charge on chain and exerts a positive inductive effect. \[\overset{\delta -}{\mathop{C}}\,\overset{\delta +}{\mathop{y}}\,\] Therefore,\[+\,\,l\]effect tends to decrease positive charge and tends to increase stability.
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