In the case of BDEs, IPs and ETEs, B3LYPvalues are the lowest. M05-2X and M06-2X data are very close. On
the contrary, B3LYP PDEs are slightly higher than M05-2X and
M06-2X values. Differences between B3LYP and M05-2X or M06-
2X values do not exceed 21 kJ mol1. For the majority of reaction
enthalpies in Table 1, they are within 10 kJ mol1. PA values show
exceptionally good agreement. Found trends in the reaction
enthalpies are identical for all three functionals. Therefore, in the
further text predominantly B3LYP results will be discussed.
The O10AH bond dissociation enthalpies grow in this order:
pyridoxine < pyridoxamine < pyridoxic acid < pyridoxal