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Number of resonance structures of nitrobenzene
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Nepolian Heart
Number of resonance structures of nitrobenzene
We never really need to know the number of resonance structures. The whole concept is qualitative, so we can't draw any quantitative conclusions from it. But if you want to do it anyway, then of course 1 and 5 are the same, while 2 and 4 are not (they have positive charges on different atoms).
Also, both oxygens are in fact equivalent, so you might want to add the structures with their roles reversed.
We never really need to know the number of resonance structures. The whole concept is qualitative, so we can't draw any quantitative conclusions from it. But if you want to do it anyway, then of course 1 and 5 are the same, while 2 and 4 are not (they have positive charges on different atoms).
Also, both oxygens are in fact equivalent, so you might want to add the structures with their roles reversed.
The first and fifth are equal contributors but not the same.More
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If you consider strict symmetry rules, you can only draw 3 really different resonance structures (the first three, from left to right), because all other structures you can draw are symmetrically equivalent to one of those 3 if you rotate it properly, those structures are only useful to show you that there is delocalization of electronic density within those atoms.
If you consider strict symmetry rules, you can only draw 3 really different resonance structures (the first three, from left to right), because all other structures you can draw are symmetrically equivalent to one of those 3 if you rotate it properly, those structures are only useful to show you that there is delocalization of electronic density within those atoms.
We never really need to know the number of resonance structures. The whole concept is qualitative, so we can't draw any quantitative conclusions from it. But if you want to do it anyway, then of course 1 and 5 are the same, while 2 and 4 are not (they have positive charges on different atoms).
Also, both oxygens are in fact equivalent, so you might want to add the structures with their roles reversed.
We never really need to know the number of resonance structures. The whole concept is qualitative, so we can't draw any quantitative conclusions from it. But if you want to do it anyway, then of course 1 and 5 are the same, while 2 and 4 are not (they have positive charges on different atoms).
Also, both oxygens are in fact equivalent, so you might want to add the structures with their roles reversed.
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If you consider strict symmetry rules, you can only draw 3 really different resonance structures (the first three, from left to right), because all other structures you can draw are symmetrically equivalent to one of those 3 if you rotate it properly, those structures are only useful to show you that there is delocalization of electronic density within those atoms.
If you consider strict symmetry rules, you can only draw 3 really different resonance structures (the first three, from left to right), because all other structures you can draw are symmetrically equivalent to one of those 3 if you rotate it properly, those structures are only useful to show you that there is delocalization of electronic density within those atoms.
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