oscarpiastri25
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Evaluating Stability of Structure C: Octet Completion, Charge Distribution, and Resonance Effects
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Octet Rule and Formal Charges:
Structure c has a complete octet for all atoms and minimizes formal charges. The negative charge is on the more electronegative oxygen atom, which is favorable.
Number of π-bonds:
While all three structures have the same number of π-bonds, the distribution and location of charges in structure c are more stable.
Charge Separation:
Structure c minimizes charge separation compared to structure b, which has a greater separation of positive and negative charges. Generally, structures with less charge separation are more stable.
Electronegativity:
Structure c places the negative charge on the oxygen atom, which is more electronegative than nitrogen or carbon, making it more stable.
Resonance Stabilization:
The delocalization of electrons through resonance contributes to the stability of all three structures, but structure c benefits most from this effect due to the factors listed above.
Structure c has a complete octet for all atoms and minimizes formal charges. The negative charge is on the more electronegative oxygen atom, which is favorable.
Number of π-bonds:
While all three structures have the same number of π-bonds, the distribution and location of charges in structure c are more stable.
Charge Separation:
Structure c minimizes charge separation compared to structure b, which has a greater separation of positive and negative charges. Generally, structures with less charge separation are more stable.
Electronegativity:
Structure c places the negative charge on the oxygen atom, which is more electronegative than nitrogen or carbon, making it more stable.
Resonance Stabilization:
The delocalization of electrons through resonance contributes to the stability of all three structures, but structure c benefits most from this effect due to the factors listed above.
Solution
oscarpiastri25
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okay so what's the order?
Amodini
Active member
Structure c > Structure a > Structure b
Reasoning:
- Structure c
- All atoms have complete octets
- Formal charges are minimized
- Negative charge is on the more electronegative oxygen
- Least charge separation
→ Most stable
- Structure a
- Octet may be satisfied
- Slightly less optimal charge distribution than c
- May have a neutral molecule with less favorable electronegativity placement
→ Moderately stable
- Structure b
- Greater charge separation
- Positive charge on less electronegative atom (possibly carbon)
- Negative charge not ideally placed
→ Least stable
oscarpiastri25
New member
That
That's wrong. it's c>b>a. Coz C has less E.N then Nitrogen.