p-n-Hexyloxybenzylidene-p'-toluidine
- Formula: C20H25NO
- Molecular weight: 295.4186
- IUPAC Standard InChI: InChI=1S/C20H25NO/c1-3-4-5-6-15-22-20-13-9-18(10-14-20)16-21-19-11-7-17(2)8-12-19/h7-14,16H,3-6,15H2,1-2H3/b21-16+
- IUPAC Standard InChIKey: GTYQEUBRZFFBBA-LTGZKZEYSA-N
- CAS Registry Number: 25959-51-7
- Chemical structure:
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Condensed phase thermochemistry data
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Data compilation copyright by the U.S. Secretary of Commerce on behalf of the U.S.A. All rights reserved.
Data compiled by: Eugene S. Domalski and Elizabeth D. Hearing
| Quantity | Value | Units | Method | Reference | Comment |
|---|---|---|---|---|---|
| S°solid,1 bar | 448.95 | J/mol*K | N/A | Tsuji, Sorai, et al., 1982 |
Constant pressure heat capacity of solid
| Cp,solid (J/mol*K) | Temperature (K) | Reference | Comment |
|---|---|---|---|
| 441.40 | 298.15 | Tsuji, Sorai, et al., 1982 | T = 17 to 385 K. |
Phase change data
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Data compilation copyright by the U.S. Secretary of Commerce on behalf of the U.S.A. All rights reserved.
Data compiled by: Eugene S. Domalski and Elizabeth D. Hearing
Enthalpy of phase transition
| ΔHtrs (kJ/mol) | Temperature (K) | Initial Phase | Final Phase | Reference | Comment |
|---|---|---|---|---|---|
| 5.040 | 317.5 | crystaline, II | crystaline, I | Tsuji, Sorai, et al., 1982 | Superheating phenomenon occurs at 324 K. |
| 25.040 | 334.26 | crystaline, I | liquid | Tsuji, Sorai, et al., 1982 | |
| 1.370 | 346.90 | liquid | liquid | Tsuji, Sorai, et al., 1982 |
Entropy of phase transition
| ΔStrs (J/mol*K) | Temperature (K) | Initial Phase | Final Phase | Reference | Comment |
|---|---|---|---|---|---|
| 15.89 | 317.5 | crystaline, II | crystaline, I | Tsuji, Sorai, et al., 1982 | Superheating |
| 74.90 | 334.26 | crystaline, I, Solid | liquid, nematic | Tsuji, Sorai, et al., 1982 | |
| 3.0 | 346.90 | liquid, Nematic | liquid, isotropic | Tsuji, Sorai, et al., 1982 |
References
Go To: Top, Condensed phase thermochemistry data, Phase change data, Notes
Data compilation copyright by the U.S. Secretary of Commerce on behalf of the U.S.A. All rights reserved.
Tsuji, Sorai, et al., 1982
Tsuji, K.; Sorai, M.; Suga, H.; Seki, S.,
Heat capacity and thermodynamic properties of p'-substituted p-n-hexyloxybenzylideneaniline. IV. p-n-Hexyloxybenzylidene-p'-toluidine (HBT),
Mol. Cryst. Liq. Cryst., 1982, 90, 97-110. [all data]
Notes
Go To: Top, Condensed phase thermochemistry data, Phase change data, References
- Symbols used in this document:
Cp,solid Constant pressure heat capacity of solid S°solid,1 bar Entropy of solid at standard conditions (1 bar) ΔHtrs Enthalpy of phase transition ΔStrs Entropy of phase transition - Data from NIST Standard Reference Database 69: NIST Chemistry WebBook
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