Fig. 10: Molecular orbital energy diagram of the K/Na5[An(mnt)4] complexes normalized to the HOMO.
From: Non–linear bonding trends in maleonitrile-1,2–dithiolate complexes of the transuranium actinides

Red bars correspond to the contribution of the 5 f to the MO and yellow boxes correspond to orbitals that consist primarily of sulfur 3p-orbitals.