ByBluefury
Hello,
I don't fully understand how both a bonding and an antibonding molecular orbital are formed in an H2 molecule. When the two 1s atomic orbitals merge, the bonding MO is formed with high electron density between the two nuclei.
But how does an antibonding MO form? This would require two additional atomic orbitals, which do not exist in H2.
(No Ratings Yet)
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Number of particles in a certain volume
No, you always get as many MOs as you have AOs. So if you combine two H atoms with one AO each, then the resulting H2 must have 2 MOs. One is binding and one anti-binding because it matters how you combine it. Since this is an LCAO (linear combination of atomic orbitals) approach, you have two options: once φ1 + φ2 and once φ1 -φ2. The former is then the binding and the latter the anti-binding orbital.