Cyclobutane-1,3-dione
- Formula: C4H4O2
- Molecular weight: 84.0734
- IUPAC Standard InChI: InChI=1S/C4H4O2/c5-3-1-4(6)2-3/h1-2H2
- IUPAC Standard InChIKey: PZQGSZRQKQZCOJ-UHFFFAOYSA-N
- CAS Registry Number: 15506-53-3
- 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: Hussein Y. Afeefy, Joel F. Liebman, and Stephen E. Stein
| Quantity | Value | Units | Method | Reference | Comment |
|---|---|---|---|---|---|
| ΔcH°solid | -450.7 ± 0.5 | kcal/mol | Ccb | Chickos and Sherwood, 1978 | Corresponding ΔfHºsolid = -62.1 kcal/mol (simple calculation by NIST; no Washburn corrections) |
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:
ALS - Hussein Y. Afeefy, Joel F. Liebman, and Stephen E. Stein
AC - William E. Acree, Jr., James S. Chickos
| Quantity | Value | Units | Method | Reference | Comment |
|---|---|---|---|---|---|
| ΔsubH° | 17.6 ± 0.5 | kcal/mol | V | Chickos and Sherwood, 1978 | ALS |
| ΔsubH° | 17.6 ± 0.88 | kcal/mol | HSA | Chickos and Sherwood, 1978 | Based on data from 274. to 322. K.; AC |
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.
Chickos and Sherwood, 1978
Chickos, J.S.; Sherwood, D.E., Jr.,
Mechanism of thermolysis of diketene in the gas phase,
J. Org. Chem., 1978, 43, 1146-1150. [all data]
Notes
Go To: Top, Condensed phase thermochemistry data, Phase change data, References
- Symbols used in this document:
ΔcH°solid Enthalpy of combustion of solid at standard conditions ΔsubH° Enthalpy of sublimation at standard conditions - Data from NIST Standard Reference Database 69: NIST Chemistry WebBook
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