Compare relative stability of the following structures: a)I II IIIb)II I IIIc)I III IId)II III ICorrect answer is option 'A'. Can you explain this answer?

Question

Compare relative stability of the following structures:  a)I > II > IIIb)II > I > IIIc)I > III > IId)II > III > ICorrect answer is option 'A'. Can you explain this answer?

Answer

Structure 1 is uncharged and most stable.
Structure 2 has a charge separation and the two charges are on adjacent atoms.
Structure 3 is the least stable as its charges are separated over a large distance.

Answer

I have one doubt. While we arranging the stability first we consider pi bonds,so more the pi bonds more will be stable

Answer

1. the more no of pi bonds, more will be the stability of the resonating structure.2. the more close will be the opposite charges , the more will be stability of the resonating structure.            If we follow these rules sequencially , then the option is A

Answer

All are resonating structure.
1st structure contains no charge so more stable.
2nd structure have negative charge on more electronegative atom. Another thing is opposite charge near. So second structure is more stable than 3rd.

Answer

I>II>III

Answer

D

Answer

Neutral molecule more stable and then charge distribution structure so option a

Answer

Str. 1 is more stable as it is a neutral species.
sr. 2 will be more stable than str. 3 as the charge separation is in small distance in the former and more electronegative O atom posses negative charge.

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