Fig. 5: Plot of the average difference in length of the two M–S bonds for each mnt2– ligand.
From: Non–linear bonding trends in maleonitrile-1,2–dithiolate complexes of the transuranium actinides

Left figure shows how the bond length difference is determined. In the plot, blue represents the lanthanide complexes and orange represents the actinide complexes. Lines represent the upper and lower range for the four ligands. Star represents Cm–β structure.