Selenophene
- Formula: C4H4Se
- Molecular weight: 131.03
- IUPAC Standard InChI: InChI=1S/C4H4Se/c1-2-4-5-3-1/h1-4H
- IUPAC Standard InChIKey: MABNMNVCOAICNO-UHFFFAOYSA-N
- CAS Registry Number: 288-05-1
- 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 as indicated in comments:
AC - William E. Acree, Jr., James S. Chickos
DH - Eugene S. Domalski and Elizabeth D. Hearing
| Quantity | Value | Units | Method | Reference | Comment |
|---|---|---|---|---|---|
| ΔvapH° | 9.1 ± 0.2 | kcal/mol | C | Voronkov, Klyuchnikov, et al., 1989 | AC |
Enthalpy of vaporization
| ΔvapH (kcal/mol) | Temperature (K) | Reference | Comment |
|---|---|---|---|
| 9.75 | 272. | Dykyj, Svoboda, et al., 1999 | Based on data from 234. - 300. K.; AC |
| 8.13 | 249. | Stull, 1947 | Based on data from 234. - 387. K.; AC |
Antoine Equation Parameters
log10(P) = A − (B / (T + C))
P = vapor pressure (atm)
T = temperature (K)
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| Temperature (K) | A | B | C | Reference | Comment |
|---|---|---|---|---|---|
| 234. - 387.5 | 3.75405 | 1331.417 | -33.354 | Stull, 1947 | Coefficents calculated by NIST from author's data. |
Enthalpy of sublimation
| ΔsubH (kcal/mol) | Temperature (K) | Reference | Comment |
|---|---|---|---|
| 11.3 | 225. | Milazzo and Paoloni, 1951 | Based on data from 208. - 243. K.; AC |
Enthalpy of phase transition
| ΔHtrs (kcal/mol) | Temperature (K) | Initial Phase | Final Phase | Reference | Comment |
|---|---|---|---|---|---|
| 0.0727 | 122.7 | crystaline, III | crystaline, II | Dworkin and Szwarc, 1991 | DH |
| 0.2643 | 192.8 | crystaline, II | crystaline, I | Dworkin and Szwarc, 1991 | DH |
| 1.096 | 240.2 | crystaline, I | liquid | Dworkin and Szwarc, 1991 | DH |
| 0.168 | 125.54 | crystaline, I3 | crystaline, I2 | Dworkin and Szwarc, 1991 | Metastable phase.; DH |
| 0.2397 | 155.4 | crystaline, I2 | crystaline, I1 | Dworkin and Szwarc, 1991 | Metastable phase.; DH |
Entropy of phase transition
| ΔStrs (cal/mol*K) | Temperature (K) | Initial Phase | Final Phase | Reference | Comment |
|---|---|---|---|---|---|
| 0.593 | 122.7 | crystaline, III | crystaline, II | Dworkin and Szwarc, 1991 | DH |
| 1.37 | 192.8 | crystaline, II | crystaline, I | Dworkin and Szwarc, 1991 | DH |
| 4.57 | 240.2 | crystaline, I | liquid | Dworkin and Szwarc, 1991 | DH |
| 1.34 | 125.54 | crystaline, I3 | crystaline, I2 | Dworkin and Szwarc, 1991 | Metastable; DH |
| 1.54 | 155.4 | crystaline, I2 | crystaline, I1 | Dworkin and Szwarc, 1991 | Metastable; DH |
References
Go To: Top, Phase change data, Notes
Data compilation copyright by the U.S. Secretary of Commerce on behalf of the U.S.A. All rights reserved.
Voronkov, Klyuchnikov, et al., 1989
Voronkov, M.G.; Klyuchnikov, V.A.; Kolabin, S.N.; Shvets, G.N.; Varushin, P.I.; Deryagina, E.N.; Korchevin, N.A.; Tsvetnitskaya, S.I.,
Thermochemical properties of dialkyl chalcogenides and dichalcogenides RMnR (M = sulfur, selenium, tellurium; n = 1, 2),
Dokl. Akad. Nauk SSSR, Phys. Chem., 1989, 307, 5, 1139. [all data]
Dykyj, Svoboda, et al., 1999
Dykyj, J.; Svoboda, J.; Wilhoit, R.C.; Frenkel, M.L.; Hall, K.R.,
Vapor Pressure of Chemicals: Part A. Vapor Pressure and Antoine Constants for Hydrocarbons and Sulfur, Selenium, Tellurium and Hydrogen Containing Organic Compounds, Springer, Berlin, 1999, 373. [all data]
Stull, 1947
Stull, Daniel R.,
Vapor Pressure of Pure Substances. Organic and Inorganic Compounds,
Ind. Eng. Chem., 1947, 39, 4, 517-540, https://doi.org/10.1021/ie50448a022
. [all data]
Milazzo and Paoloni, 1951
Milazzo, G.; Paoloni, L.,
Ann. Chim. (Rome), 1951, 41, 673. [all data]
Dworkin and Szwarc, 1991
Dworkin, A.; Szwarc, H.,
Thermodynamic evidence for stable and metastable phases in crystalline selenophene, C. R. l'Academie Sci.,
Ser. II Univers, 1991, 312(7), 701-704. [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 ΔsubH Enthalpy of sublimation ΔvapH Enthalpy of vaporization ΔvapH° Enthalpy of vaporization at standard conditions - Data from NIST Standard Reference Database 69: NIST Chemistry WebBook
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