Ueber die Schmelzwärmen einiger organischen Verbindungen

Bruner, L.

doi:10.1002/cber.189402702181

Cited by 26 publications

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“…Temperatures and enthalpies of fusion of L-and DL-menthol at 0.1 MPa. 307.0 ± 0.3 [2] 14.2 ± 0.2 [2] 316.1 ± 0.3 [2] 14.1 ± 0.2 [2] 307.2 [11] 13.9 ± 0.3 (mean) c 316 f [47] 11.9 f [47] 306.5 ± 0.8 (mean) c 316.7 ± 0.1 [3] 12.83 ± 0.10 [3] 315 [48] 12.4 [48] 315.6 [8] 315.7 [11] 315.4 [49] 315.6 [50] β phase 310.0 ± 0. 308.5 ± 0.3 [2] 11.0 ± 0.2 [2] 300.5 e 10.0 e 308.6 [8] 11.2 ± 0.3 (mean) c 300.5 ± 0.3 [2] 9.3 ± 0.2 [2] 310.7 [11] 301 f [47] 10.3 f [47] 309.5 [50] 300.5 [11] 9.7 ± 0.4 (mean) c 295.9 ± 0.6 [10] 1.9 ± 0.2 [10] 306.0 ± 0.…”

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Polymorphism and thermophysical properties of l- and dl-menthol

Štejfa

Bazyleva

Fulem

et al. 2019

The Journal of Chemical Thermodynamics

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The thermodynamic properties, phase behavior, and kinetics of polymorphic transformations of racemic (DL-) and enantiopure (L-) menthol were studied using a combination of advanced experimental techniques, including static vapor pressure measurements, adiabatic calorimetry, Tian-Calvet calorimetry, differential scanning calorimetry (DSC), and variable-temperature X-ray powder diffraction. Several concomitant polymorphs (α, β, γ, and δ forms) were observed and studied. A continuous transformation to the stable α form was detected by DSC and monitored in detail using X-ray powder diffraction. A long-term coexistence of the stable crystalline form with the liquid phase was observed. The vapor pressure measurements of both compounds were performed using two static apparatus over a temperature range from 274 K to 363 K. Condensedphase heat capacities were measured by adiabatic and Tian-Calvet calorimetry in the wide temperature interval from 5 K to 368 K. Experimental data of Land DL-menthol are compared mutually as well as with available literature results. The thermodynamic functions of crystalline and liquid L-menthol between 0 K and 370 K were calculated from the calorimetric results. The thermodynamic properties in the ideal-gas state were obtained by combining statistical thermodynamics and quantum chemical calculations based on a thorough conformational analysis. Calculated ideal-gas heat capacities and experimental data on vapor pressure and condensed-phase heat capacity were treated simultaneously to obtain a consistent thermodynamic description. Based on the obtained results, the phase diagrams of L-menthol and DL-menthol were suggested.

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confidence: 99%

Polymorphism and thermophysical properties of l- and dl-menthol

Štejfa

Bazyleva

Fulem

et al. 2019

The Journal of Chemical Thermodynamics

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Ueber Schmelzpunkterhöhung durch Druck und den continuirlichen Uebergang vom festen zum flüssigen Aggregatzustand

Heydweiller¹

1898

Annalen der Physik

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6. Ueber SchmeI%pwikterh6hung durch Druck wnd den conVtm&rMchen Uebergarcy uom fester& sum jldk884gen Aggregatwuetand ; von A d o If H e y d w e i 2 2 e r . 1, Ueber den Einfluss des Druckes auf die Schmelztemperatur liegen aus den letzten Jahren Versuche der Herren Damien') und Demerliaca) vor; hiernach soll die Schmelztemperatur nicht proportional, sondern stark verzogert mit dem Druck zunehmen bis zu einem Maximum, das bei Naphtalin etwa 20 O, bei den iibrigen untersuchten Substanzen d P = --?.

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Ueber die Aenderung der Schmelzwärme auf der Schmelzdruckcurve

Tammann

1899

Annalen der Physik

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Ueber die Schmelzwärmen einiger organischen Verbindungen

Cited by 26 publications

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Polymorphism and thermophysical properties of l- and dl-menthol

Polymorphism and thermophysical properties of l- and dl-menthol

Ueber Schmelzpunkterhöhung durch Druck und den continuirlichen Uebergang vom festen zum flüssigen Aggregatzustand

Ueber die Aenderung der Schmelzwärme auf der Schmelzdruckcurve

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