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Is Molecular Orbital Theory really helpful?

  1. Jul 10, 2018 #1
    Who am I kidding? Of course it is. But, everywhere I look, the series of increasing levels of orbitals is till
    σ*2pz only
    upload_2018-7-10_22-38-36.png
    That's all.
    So if I need to find bond order of , say, some molecule with greater number of e- like BF3 with 24 electrons, how do I proceed?
     
  2. jcsd
  3. Jul 10, 2018 #2

    Charles Link

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    In this sort of thing, it helps to know the geometry and any symmetry the molecule may have. In the case of ## sp^3 ## hybridization, if I remember correctly, (it has been quite a few years since I took a sequence of undergraduate chemistry courses, and it also showed up later in a physics group theory graduate course), you get 4 orbitals that form a tetrahedron around the central atom, and if you only have 3 atoms to attach, you may be left with a lone pair of electrons on the 4th corner of the tetrahedron. I haven't used this stuff a lot, but yes, it can be useful. ## \\ ## Edit: And a subsequent google shows I have it correct: https://courses.lumenlearning.com/introchem/chapter/sp3-hybridization/
     
    Last edited: Jul 10, 2018
  4. Jul 10, 2018 #3

    TeethWhitener

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  5. Jul 11, 2018 #4
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