Finally, the energy penalty due to the geometric/electronic rearrangement of the fragments to reach the bonded state (EPREP) must increase when a higher order of hybridization takes place in the chemical bonding . This statement applies in the case of the MnSPhos system, where the contribution of EPREP is up to 41% as a result of the change in the number of unpaired electrons of the isolated metal for its spin state in the MnSPhos system . In other words, the resulting changes in the number of unpaired electrons can be associated with the difference of EPREP term values between doped systems (TMSPhos having one more unpaired electron than the TMAPhos complexes).