why sigma 2px lie at higher energy level than pi2py and pi 2pz in N2?
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Explanation:
The energy levels of sigma 2pz and pi2px and pi2py are switched, meaning that for these cases the pi2px and pi2py (degenerate) are lower than sigma 2pz. The anti bonding orbitals are not switched. This switch in energy level is because of interference between sigma 2s* and sigma 2pz.
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