Bicalutamide polymorphs I and II
Abstract For a complete picture of the phase behavior of a compound exhibiting dimorphism, not only the temperature but also the pressure, the second variable of the Gibbs energy, should be taken into account. Because volume reflects the dependence of the Gibbs energy on pressure, investigating the specific volumes of a compound provides information on its phase behavior under pressure. This can be quantified using the Clapeyron equation, which leads to a so-called topological pressure–temperature phase diagram. Bicalutamide is used as a sample case and with literature data its topological phase diagram has been constructed. Even though the phase relationship between bicalutamide’s two known solid phases is monotropic at ordinary pressure, it becomes enantiotropic at higher pressure. The steep slope of the solid–solid equilibrium in the P–T diagram, 22.5 MPa $ K^{−1} $, indicates that pressure has virtually no influence on it and that it is mainly entropy driven..
| Medienart: |
Artikel |
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| Erscheinungsjahr: |
2012 |
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| Erschienen: |
2012 |
| Enthalten in: |
Zur Gesamtaufnahme - volume:112 |
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| Enthalten in: |
Journal of thermal analysis and calorimetry - 112(2012), 1 vom: 05. Sept., Seite 223-228 |
| Sprache: |
Englisch |
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| Beteiligte Personen: |
Gana, Inès [VerfasserIn] |
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| Links: |
Volltext [lizenzpflichtig] |
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| Themen: |
API |
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| Anmerkungen: |
© Akadémiai Kiadó, Budapest, Hungary 2012 |
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| doi: |
10.1007/s10973-012-2617-7 |
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| PPN (Katalog-ID): |
OLC2049819757 |
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| 520 | |a Abstract For a complete picture of the phase behavior of a compound exhibiting dimorphism, not only the temperature but also the pressure, the second variable of the Gibbs energy, should be taken into account. Because volume reflects the dependence of the Gibbs energy on pressure, investigating the specific volumes of a compound provides information on its phase behavior under pressure. This can be quantified using the Clapeyron equation, which leads to a so-called topological pressure–temperature phase diagram. Bicalutamide is used as a sample case and with literature data its topological phase diagram has been constructed. Even though the phase relationship between bicalutamide’s two known solid phases is monotropic at ordinary pressure, it becomes enantiotropic at higher pressure. The steep slope of the solid–solid equilibrium in the P–T diagram, 22.5 MPa $ K^{−1} $, indicates that pressure has virtually no influence on it and that it is mainly entropy driven. | ||
| 650 | 4 | |a API | |
| 650 | 4 | |a Topological phase diagram | |
| 650 | 4 | |a Thermodynamics | |
| 650 | 4 | |a Phase behavior | |
| 650 | 4 | |a Clapeyron equation | |
| 650 | 4 | |a Entropy-driven transition | |
| 700 | 1 | |a Céolin, René |4 aut | |
| 700 | 1 | |a Rietveld, Ivo B. |4 aut | |
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