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Question
What is the correct order of stability for above carbocations?
CH3−O(A)−+CH2,CH3−NH(B)−+CH2,CH3−S(C)−+CH2
What is the correct order of stability for above carbocations?
CH3−O(A)−+CH2,CH3−NH(B)−+CH2,CH3−S(C)−+CH2
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Solution
The correct option is D C > A > B
In compound A: Oxygen show +M (mesomeric) effectin compound B: Nitrogen is showing +R (resonance) effectin compound C: Sulphur is showing +M (mesomeric) effectmesomeric effect is more dominating over resonance effectand +M of S is more dominating over +M of OHence, the order become C > A > B
In compound A: Oxygen show +M (mesomeric) effect
in compound B: Nitrogen is showing +R (resonance) effect
in compound C: Sulphur is showing +M (mesomeric) effect
mesomeric effect is more dominating over resonance effect
and +M of S is more dominating over +M of O
Hence, the order become C > A > B
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