4,4'-Dihexanoyloxydiphenyldiacetylene
- Formula: C28H30O4
- Molecular weight: 430.5354
- IUPAC Standard InChI: InChI=1S/C28H30O4/c1-3-5-7-13-27(29)31-25-19-15-23(16-20-25)11-9-10-12-24-17-21-26(22-18-24)32-28(30)14-8-6-4-2/h15-22H,3-8,13-14H2,1-2H3
- IUPAC Standard InChIKey: QGHKREKJSWULHP-UHFFFAOYSA-N
- CAS Registry Number: 92341-26-9
- Chemical structure:
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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 |
|---|---|---|---|---|---|
| 19.000 | 343. | crystaline, III | crystaline, II | Ozcayir, Asrar, et al., 1984 | |
| 1.460 | 396. | crystaline, II | crystaline, I | Ozcayir, Asrar, et al., 1984 | |
| 26.300 | 407. | crystaline, I | liquid | Ozcayir, Asrar, et al., 1984 | |
| 1.710 | 430. | liquid | liquid | Ozcayir, Asrar, et al., 1984 |
Entropy of phase transition
| ΔStrs (J/mol*K) | Temperature (K) | Initial Phase | Final Phase | Reference | Comment |
|---|---|---|---|---|---|
| 55.40 | 343. | crystaline, III | crystaline, II | Ozcayir, Asrar, et al., 1984 | |
| 3.682 | 396. | crystaline, II | crystaline, I | Ozcayir, Asrar, et al., 1984 | |
| 64.64 | 407. | crystaline, I, Solid | liquid, nematic | Ozcayir, Asrar, et al., 1984 | |
| 3.975 | 430. | liquid, Nematic | liquid, isotropic | Ozcayir, Asrar, et al., 1984 |
References
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Data compilation copyright by the U.S. Secretary of Commerce on behalf of the U.S.A. All rights reserved.
Ozcayir, Asrar, et al., 1984
Ozcayir, Y.; Asrar, J.; Blumstein, A.,
Diacetylenic liquid crystals: a systematic investigation of the homologous series of 4,4'-dialkanoyloxydiphenyldiacetylenes,
Mol. Cryst. Liq. Cryst., 1984, 110, 263-276. [all data]
Notes
Go To: Top, Phase change data, References
- Symbols used in this document:
ΔHtrs Enthalpy of phase transition ΔStrs Entropy of phase transition - Data from NIST Standard Reference Database 69: NIST Chemistry WebBook
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