Thermochemistry of myricetin flavonoid

А. Ж. Абильдаева, Bulat Kunurovich Kasenov, Zhenisgul Imangalievna Sagintaeva, Е. Е. Куанышбеков, Bibigul B. Rakhimova, Vladilen Vasil'yevich Polyakov, Sergazy Mynzhasarovich Adekenov

2014

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DOI 10.1134/s0036024414080020

Data confidence 70 medium

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Abstract

The enthalpies of myricetin dissolution are measured by means of calorimetry with mol dilutions of flavonoid: 96 mol % ethanol equal to 1: 9000, 1: 18000, and 1: 36000. The standard enthalpies of dissolution for the biologically active substance in an infinitely diluted (standard) solution of 96% ethanol are calculated from the experimental data. Physicochemical means of approximation are used to estimate the values of the standard enthalpy of combustion, and the enthalpy of melting is calculated for the investigated flavonoid. Finally, the compound’s standard enthalpy of formation is calculated using the Hess cycle.