Why does Chem3D minimize nitrogen dioxide (radical) so badly?

The Customer

• April 16, 2020 07:01

I build from text `O-N+O`, I delete the hydrogen atom added automatically on N, then I click Ctrl+M. Both the bond length and the angle differ from what I see in the top right image here: https://en.wikipedia.org/wiki/Nitrogen_dioxide

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  The Customer

  • April 16, 2020 07:08

  And regarding nitrite, which is ONO-

  Why doesn't it show it to me as having a resonance structure? How would I tell Chem3D to build it with a resonance structure instead of O=N-O-

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  The Customer

  • April 16, 2020 07:14

  The bond angle on Nitrite is supposedly around 115° (source: https://en.wikipedia.org/wiki/Nitrite#Structure)

  Minimizing with Chem3D gives me 121°

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