Table 7.

Calculated and experimental ΔH°(c) (in kJ/mol) of Tautomeric Ketones and β-Diketones.

Compound	Keto Form ∆Hc ealc	Enol Form ∆Hc ealc	∆Hc exp	a	Ref.
1-(N-Phenylformimidoyl)-2-naphthol	−8608.3	−8560.3		+	[534]
Acetone	−1791.0	−1798.0	−1816.5	+	[535]
Cyclohexanone	−3509.3	−3497.6	−3517.6	−	[535]
Cyclopentanone	−2865.1	−2858.1	−2873.5	−	[536]
Phenol	−3149.4	−3055.4	−3055.5	+	[537]
2-Pyridone	−2557.4	−2513.2	−2517.62	−	[538,539,540]
4-Pyridone	−2573.8	−2564.2	−2537.5	+	[538,539,540]
Carbostyril	−4461.4	−4413.7	−4397.1	−	[541,542,543]
Acetylacetone	−2686.5	−2674.5	−2687.0	+	[544]
Bis(trifluoroacetyl)methane	−1640.7	−1628.7	−1673.7	+	[544]
Dibenzoylmethane	−7404.8	−7394.1	−7398.5	+	[544]
1,1-Bis(benzoyl)ethane	−8057.6	−8036.1		−	[544]

^a Conformance with experimental data.