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Bond Order from Lewis.mpg

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Uploaded by on Dec 1, 2009

How to determine bond order from a Lewis diagram (with resonance). Determining bond order from an MO diagram uses a different method.

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Uploader Comments (EnderlePhD)

  • YOU ARE A SUPERSTARRR!!!!!!!!!!!!!!!!!!!­!!!!!!!!!!!!!!!!! YOU FUCKING ROCKKKK LOL! Can't thank you enough. However, what is the purpose of the bond order? Like what does it prove?

  • @MsEvilgenius101 The bond order indicates the type of bond. BO = 1 is a single bond, BO = 2 is a double bond, and BO = 3 is a triple bond. Any number in between is a combination thereof. Most students will see the importance of bond order when they learn molecular orbital diagrams because there the bond order is not as straightforward as this example.

  • Thanks for the video! Do you mind me asking how I would find the bond order for a molecule such as nitryl chloride? O2NCl? Here, there is resonance with the chlorine and I don't think your method would work.

  • @MrWelfare Tell me what you think are all the viable resonance structures and I'll answer the question.  It does get more difficult when the resonance structures don't contribute equally.

  • i dont like that method. i say use best resonance structure count total bonds and divide by number of outside atoms being bonded to.

  • @sweetsmile493 That's fine with me. Be careful because not all bonds are involved in the resonance so it is easy to mis-count depending on the given molecule.

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  • thanks homie

  • @EnderlePhD thanks for the reply! But I got it figured out! I realized after that the formal charges in the Lewis Structure with the double bond on the Cl made that model unfavorable. After I ignored that one, I was able to get the NO bond order of 1.5 the same way you described above. Thanks again!!!

  • thank you guy

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