HPLC of Formula: 18362-64-6. The protonation of heteroatoms in aromatic heterocycles can be divided into two categories: lone pairs of electrons are in the aromatic ring conjugated system; and lone pairs of electrons do not participate. Compound: 2,6-Dimethyl-3,5-heptanedione, is researched, Molecular C9H16O2, CAS is 18362-64-6, about Enthalpies of combustion of four methyl-substituted heptane-3,5-diones and benzoylacetone. Author is Ferrao, Maria Luisa C. C. H.; Ribeiro da Silva, M. A. V.; Suradi, S.; Pilcher, G.; Skinner, H. A..
The standard enthalpies of combustion of 2,2- and 2,6-dimethyl-, 2,2,6-trimethyl-, and 2,2,6,6-tetramethyl-3,5-heptanediones and PhCOCH2COMe (I) in O at 298.15 K were measured in a static bomb calorimeter. The standard enthalpies of formation of these ketones were calculated for the keto-enol equilibrium mixtures in the condensed state and for the liquid and gaseous enol forms from the above results. An estimate of the enthalpy of formation of I suggests that it exists predominantly in the enol form in the gaseous state.
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Reference:
Thiazole | C3H3NS – PubChem,
Thiazole | chemical compound | Britannica