I know that in a cubic arrangement of ligands around a metal centre (as a precursor step in the formation of a tetrahedral complex), the increase in the energy of the barycentre is lower than when the ligands are directly approaching along the coordinate axes during the formation of an octahedral complex.

Then why do cubic complexes not form in the first place? Won't the energy of the barycentre be lower then?

Also what is the calculation of the barycentre energey?



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