The energy partition schemes are tributary to certain conventional
definitions, since the components cannot be presented as
observables. The detailed results depend on the choice of fragments.
In the previous analysis we used metal ions in their formal
oxidation states (doubly or triply positively charged ions) and the
corresponding counterpart of six ligands, so that the sum of fragment
charges equals those of the complex. This is a reasonable
conventional choice, since the Ligand Field concepts relies on a
quasi-ionic bonding regime, where the ion is treated as weakly
or moderately perturbed by the ligands, the orbital scheme
remaining effectively based on d orbitals of the free ion. However,
we will try to inspect the outcome resulted from other possible
conventions.