Table 2. Calculated Thermodynamic Parametersa (in DCM) for the keto-/enol-Product Mixed with Pyridone; Values are Given in kcal/mol.
sample | ΔErel | ΔHrel | TΔSrel | ΔGrel |
---|---|---|---|---|
imidazolidin-2-one | –19.66 | –19.78 | –0.65 | –19.12 |
imidazolidine-2-thione | –19.19 | –19.25 | 0.77 | –20.03 |
oxazolidin-2-one | –16.01 | –15.96 | –0.01 | –15.95 |
oxazolidine-2-thione | –15.76 | –15.95 | –0.66 | –15.28 |
Calculated using the B3LYP/6-311++G(d,p) basis set, and the values are given relative to the enol-form in all reaction systems.