Fig. 3
From: Octa-coordinated alkaline earth metal–dinitrogen complexes M(N2)8 (M=Ca, Sr, Ba)
Orbital correlation diagram. Orbital correlation diagram of the spd valence orbitals of an atom M with the configuration (n−1)d2(n)s0(n)p0 in an octa-coordinated cubic (Oh) field of eight N2 ligands and occupied valence orbitals of Ca(N2)8. Only the occupied valence orbitals that are relevant for the Ca–N2 interactions are shown
