| Инд. авторы: | Drebushchak T.N., Mikhailovskaya A.V., Drebushchak V.A., Mikhailenko M.A., Myz’ S.A., Shakhtshneider T.P., Kuznetsova S.A. |
| Заглавие: | CRYSTALLINE FORMS OF BETULIN: POLYMORPHISM OR PSEUDOPOLYMORPHISM? |
| Библ. ссылка: | Drebushchak T.N., Mikhailovskaya A.V., Drebushchak V.A., Mikhailenko M.A., Myz’ S.A., Shakhtshneider T.P., Kuznetsova S.A. CRYSTALLINE FORMS OF BETULIN: POLYMORPHISM OR PSEUDOPOLYMORPHISM? // Journal of Structural Chemistry. - 2020. - Vol.61. - Iss. 8. - P.1260-1266. - ISSN 0022-4766. - EISSN 1573-8779. |
| Внешние системы: | DOI: 10.1134/S0022476620080119; SCOPUS: 2-s2.0-85091281374; WoS: 000571478100011; |
| Реферат: | eng: Abstract: By recrystallization with different solvents as well as decomposition of betulin ethanol solvate at room temperature a new crystalline form of the biologically active compound betulin, namely hemihydrate of betulin, is obtained. By single crystal X-ray diffraction data the crystal structure of hemihydrate of betulin is determined. By powder X-ray thermodiffraction and differential scanning calorimetry it is found that when hemihydrate of betulin is heated to melting, Н2О molecules are removed and solid-phase transformations occur, which are related to the formation of an intermediate crystalline form andan orthorhombic modification of betulin. © 2020, Pleiades Publishing, Ltd.
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| Ключевые слова: | solid-phase transformations; pseudopolymorphism; polymorphism; betulin; |
| Издано: | 2020 |
| Физ. характеристика: | с.1260-1266 |