4-Nitrophenyl-4'-n-octyloxybenzoate
- Formula: C21H25NO5
- Molecular weight: 371.4269
- CAS Registry Number: 52910-78-8
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Condensed phase thermochemistry data
Go To: Top, Phase change data, References, Notes
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
Constant pressure heat capacity of solid
| Cp,solid (J/mol*K) | Temperature (K) | Reference | Comment |
|---|---|---|---|
| 510. | 300. | Rachwalska, Massalska-Arodz, et al., 1982 | T = 100 to 356 K. Data given graphically. Value given is an estimate from the graph. |
Phase change data
Go To: Top, Condensed phase thermochemistry data, References, Notes
Data compilation copyright by the U.S. Secretary of Commerce on behalf of the U.S.A. All rights reserved.
Data compiled as indicated in comments:
TRC - Thermodynamics Research Center, NIST Boulder Laboratories, Chris Muzny director
DH - Eugene S. Domalski and Elizabeth D. Hearing
| Quantity | Value | Units | Method | Reference | Comment |
|---|---|---|---|---|---|
| Ttriple | 323.70 | K | N/A | Rachwalska, Massalska-Arodz, et al., 1982, 2 | Smectic liquid crystal phase; Uncertainty assigned by TRC = 0.02 K; TRC |
Enthalpy of fusion
| ΔfusH (kJ/mol) | Temperature (K) | Reference | Comment |
|---|---|---|---|
| 34.426 | 323.70 | Rachwalska, Massalska-Arodz, et al., 1982 | Solid-smectic.; DH |
Entropy of fusion
| ΔfusS (J/mol*K) | Temperature (K) | Reference | Comment |
|---|---|---|---|
| 106.4 | 323.70 | Rachwalska, Massalska-Arodz, et al., 1982 | Solid-smectic.; DH |
Temperature of phase transition
| Ttrs (K) | Initial Phase | Final Phase | Reference | Comment |
|---|---|---|---|---|
| 323. | crystaline, II | crystaline, I | Bata, Buka, et al., 1979 | DH |
Enthalpy of phase transition
| ΔHtrs (kJ/mol) | Temperature (K) | Initial Phase | Final Phase | Reference | Comment |
|---|---|---|---|---|---|
| 0.213 | 334.9 | liquid | liquid | Rachwalska, Massalska-Arodz, et al., 1982 | DH |
| 0.448 | 341.2 | liquid | liquid | Rachwalska, Massalska-Arodz, et al., 1982 | DH |
| 34.720 | 323.2 | crystaline, II | liquid | Bata, Buka, et al., 1979 | DH |
| 0.090 | 334. | liquid | liquid | Bata, Buka, et al., 1979 | DH |
| 0.290 | 341. | liquid | liquid | Bata, Buka, et al., 1979 | DH |
Entropy of phase transition
| ΔStrs (J/mol*K) | Temperature (K) | Initial Phase | Final Phase | Reference | Comment |
|---|---|---|---|---|---|
| 0.59 | 334.9 | liquid, Smectic | liquid, nematic | Rachwalska, Massalska-Arodz, et al., 1982 | DH |
| 1.3 | 341.2 | liquid, Nematic | liquid, isotropic | Rachwalska, Massalska-Arodz, et al., 1982 | DH |
| 108. | 323.2 | crystaline, II | liquid | Bata, Buka, et al., 1979 | DH |
| 0.30 | 334. | liquid, Smectic A | liquid, nematic | Bata, Buka, et al., 1979 | DH |
| 0.88 | 341. | liquid, Nematic | liquid, isotropic | Bata, Buka, et al., 1979 | DH |
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.
Rachwalska, Massalska-Arodz, et al., 1982
Rachwalska, M.; Massalska-Arodz, M.; Moscicki, J.K.; Jaich, A.,
Calorimetric study of NPOB,
Mol. Cryst. Liq. Cryst., 1982, 80, 157-164. [all data]
Rachwalska, Massalska-Arodz, et al., 1982, 2
Rachwalska, M.; Massalska-Arodz, M.; Moscicki, J.K.; Jaich, A.,
Calorimetric Study of NPOB,
Mol. Cryst. Liq. Cryst., 1982, 80, 157. [all data]
Bata, Buka, et al., 1979
Bata, L.; Buka, A.; Janossy, I.; Szabon, J.,
Investigation of the physical parameters of NPOOB around the phase transitions, Adv. Liq. Cryst. Res. Appl., Proc. Liq. Cryst. Conf. Soc. Countries,
3rd, 1979, 1, 209-219. [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 Ttriple Triple point temperature Ttrs Temperature of phase transition ΔHtrs Enthalpy of phase transition ΔStrs Entropy of phase transition ΔfusH Enthalpy of fusion ΔfusS Entropy of fusion - Data from NIST Standard Reference Database 69: NIST Chemistry WebBook
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