Is Molecular Orbital Theory really helpful?

[prakhargupta3301]

Who am I kidding? Of course it is. But, everywhere I look, the series of increasing levels of orbitals is till
σ^*2p_z only

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?

 

[Charles Link]

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/

 

[TeethWhitener]

Who am I kidding? Of course it is. But, everywhere I look, the series of increasing levels of orbitals is till
σ^*2p_z only
View attachment 227898
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?

This will get you started:
http://www1.lasalle.edu/~prushan/IC-articles/Polyatomic Molecular Orbital Theory.pdf

 

[prakhargupta3301]

This will get you started:
http://www1.lasalle.edu/~prushan/IC-articles/Polyatomic Molecular Orbital Theory.pdf

Thanks for trying to help. But that is way too complex for me.
Thanks anyways :D