Enthalpies of formation of some aliphatic branched ketones

Enthalpies of combustion and vaporization at 25.0 °C have been measured for some aliphatic branched ketones. Enthalpies of formation at 25.0 °C have been derived for the compounds in the liquid and gaseous states. The results are: ΔHfo(l)/kJ mol−1ΔHfo(g)/kJ mol−12-Methyl-3-pentanone−325.9 ± 0.9−286.1 ± 0.92,2-Dimethyl-3-pentanone−356.1 ± 1.4−313.8 ± 1.42,4-Dimethyl-3-pentanone−352.9 ± 1.1−311.3 ± 1.12,2,4-Trimethyl-3-pentanone−381.6 ± 1.2−338.3 ± 1.22,2,4,4-Tetramethyl-3-pentanone−391.2 ± 1.2−345.8 ± 1.22,6-Dimethyl-4-heptanone−408.6 ± 1.2−357.7 ± 1.22,2,5,5-Tetramethyl-3-hexanone−442.7 ± 2.3−393.9 ± 2.3