Question

Use the following figure of atomic orbital energies to explain what you observed in the switch of the pz sigma (g) and the pi(u)

Changes in molecular orbital energy levels for ground state homonuclear diatomic molecules Energy *(2p) 7 "(2p) ----- - 0,*(2p) (2p) ------ ++ +++ *,*(2) z_(20) ++ titt - ## ## Ho # ## ,127) 5,20 # 0,123) # # # o #.....# # 0,4(25) 9412) B2 Assuming that the criterion you determined in the previous question can be accomplished and pzo, is very destabilized resulting in po, orbital becoming higher in energy then ther, orbitals. Use the following figure of atomic orbital energies to explain what you observed in the switch of the Pz Og and the Tu.

Answer 1

On moving from B2 to F2 energy of orbitals decreases this is because of electronegativity increase. From O2 since energy gap between 2S &2P is very less so s-p mixing takes place.

And we get different pattern of molecular orbitals.here energy of Pi MO is greater than sigma Pz orbital....