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Decreasing order of stability And explain plzzz sir why .... And how to solve such problems

Decreasing order of stability
And explain plzzz sir why ....
And how to solve such problems

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Grade:12th pass

1 Answers

Lucy
18 Points
5 years ago
The order is B>D>C>A
The reason  for B being most stable is the direct transfer of lone pair of N to the carbonation.this type of resonance is considered to be most stable one bcz of the direct transfer of e-rich lone pair to the positive charge.then D ,this is bcz the positive charge is stabilised by the +I effect and hyperconhugation by 3 methyl groups.then C bcz is stabilised by +I effect and hyperconjugationof 2 methyl groups.lastly A bcz of +I effectvand hyperconjugation of only one methyl group.
To check the stability we have to apply the various effects like inductive ,resonance etc according to their strength.
 

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