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Heteronuclear Diatomic Molecules

Posted: Mon Nov 28, 2016 10:40 pm
by Niveda_Tennety_1H
In a molecular orbital diagram for a heteronuclear diatomic molecule that has 1 element from groups 13-15 and another element from groups 16-18, what template must be used? Should the pi 2p orbitals have a lower energy than the sigma 2p or is it vice versa? For example, [BO]-

Re: Heteronuclear Diatomic Molecules

Posted: Mon Nov 28, 2016 10:46 pm
by Kevin Tam 1J
I think the rule is that for Z<8, the pi orbitals are lower in energy than the sigma orbitals, but for Z greater than or equal to 8, the pi orbitals are higher in energy than the sigma orbitals.

Re: Heteronuclear Diatomic Molecules

Posted: Thu Dec 01, 2016 10:59 am
by Jeannie_Kim_1I
Would we need to know how to draw MO diagrams for heteronuclear diatomic molecules that are not in the same period (i.e. NaF)?