Kasenova S.B.,Abishev Chemical and Metallurgical Institute |
Mukusheva G.K.,International Research and Production Holding Fitokhimiya |
Kasenov B.K.,Abishev Chemical and Metallurgical Institute |
Sagintaeva Z.I.,Abishev Chemical and Metallurgical Institute |
And 3 more authors.
Russian Journal of Physical Chemistry A | Year: 2015
The enthalpies of dissolution of pinostrobin hydrazone C16H16N2O3, (N-ethyl-2-(5-hydroxy-7-methoxy-2-phenylchroman-4-ylidene)hydrazino-1-carbothiamide) thiosemicarbazone C19H21N3O3S, salvigenine C18H16O6, and pinostrobin-2-(5-hydroxy-7-methoxy-2-phenylchroman-4-ylidene)-N-phenylhydrazino- 1-carbothiamide thiosemicarbazide C23H21N3O3S are measured on a DAK-I-IA calorimeter at flavonoid: ethanol molar ratios of 1: 9000, 1: 18000, and 1: 36000. Their standard enthalpies of dissolution in 96% ethanol are calculated from the obtained data. Their standard enthalpies of combustion, melting, and formation are estimated by approximate methods. © 2015 Pleiades Publishing, Ltd.