Cyclobutane, methylene-
- Formula: C5H8
- Molecular weight: 68.1170
- IUPAC Standard InChI: InChI=1S/C5H8/c1-5-3-2-4-5/h1-4H2
- IUPAC Standard InChIKey: QIRVGKYPAOQVNP-UHFFFAOYSA-N
- CAS Registry Number: 1120-56-5
- Chemical structure:
This structure is also available as a 2d Mol file or as a computed 3d SD file
The 3d structure may be viewed using Java or Javascript. - Species with the same structure:
- Other names: Methylenecyclobutane
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Condensed phase thermochemistry data
Go To: Top, 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
DH - Eugene S. Domalski and Elizabeth D. Hearing
| Quantity | Value | Units | Method | Reference | Comment |
|---|---|---|---|---|---|
| ΔfH°liquid | 22.43 ± 0.14 | kcal/mol | Ccb | Good, Moore, et al., 1974 | ALS |
| Quantity | Value | Units | Method | Reference | Comment |
| ΔcH°liquid | -765.95 ± 0.12 | kcal/mol | Ccb | Good, Moore, et al., 1974 | Corresponding ΔfHºliquid = 22.43 kcal/mol (simple calculation by NIST; no Washburn corrections); ALS |
| Quantity | Value | Units | Method | Reference | Comment |
| S°liquid | 50.24 | cal/mol*K | N/A | Finke, Messerly, et al., 1981 | DH |
| S°liquid | 50.33 | cal/mol*K | N/A | Lebedev, Tsvetkova, et al., 1978 | DH |
| S°liquid | 50.33 | cal/mol*K | N/A | Lebedev, Tsvetkova, et al., 1978, 2 | DH |
| S°liquid | 50.33 | cal/mol*K | N/A | Lebedev, Lebedev, et al., 1975 | DH |
Constant pressure heat capacity of liquid
| Cp,liquid (cal/mol*K) | Temperature (K) | Reference | Comment |
|---|---|---|---|
| 31.33 | 298.15 | Finke, Messerly, et al., 1981 | T = 12 to 301 K. Equation also given for temperature range 146 to 301 K.; DH |
| 31.93 | 298.15 | Lebedev, Tsvetkova, et al., 1978 | T = 12 to 315 K.; DH |
| 31.93 | 298.15 | Lebedev, Tsvetkova, et al., 1978, 2 | T = 12 to 315 K.; DH |
| 31.93 | 298.15 | Lebedev, Lebedev, et al., 1975 | T = 6 to 320 K.; DH |
References
Go To: Top, Condensed phase thermochemistry data, Notes
Data compilation copyright by the U.S. Secretary of Commerce on behalf of the U.S.A. All rights reserved.
Good, Moore, et al., 1974
Good, W.D.; Moore, R.T.; Osborn, A.G.; Douslin, D.R.,
The enthalpies of formation of ethylcyclobutane, methylenecyclobutane, and 1,1-dimethylcyclopropane,
J. Chem. Thermodyn., 1974, 6, 303-310. [all data]
Finke, Messerly, et al., 1981
Finke, H.L.; Messerly, J.F.; Lee-Bechtold, S.H.,
Thermodynamic properties of cyclopropylamine, cyclopentylamine, and methylenecyclobutane,
J. Chem. Thermodyn., 1981, 13, 345-355. [all data]
Lebedev, Tsvetkova, et al., 1978
Lebedev, B.V.; Tsvetkova, L.Ya.; Rabinovich, I.B.; Finkel'shtein, E.Sh.; Strel'chik, B.S.,
Thermodynamic characteristics of methylenecyclobutane,
Termodin. Org. Soedin., 1978, (7), 3-7. [all data]
Lebedev, Tsvetkova, et al., 1978, 2
Lebedev, B.V.; Tsvetkova, L.Ya.; Rabinovich, I.B.,
Thermodynamics of methylenecyclobutane,
J. Chem. Thermodyn., 1978, 10, 809-815. [all data]
Lebedev, Lebedev, et al., 1975
Lebedev, B.V.; Lebedev, N.K.; Kiparisova, Y.G.; Tsvetkova, L.Ya.; Rabinovich, I.B.,
Thermodynamics of methylenecyclobutane and 1,5-cyclooctadiene,
Quatrieme Conference International de Thermodynamique Chimique, 1975, II, Thermophysique (capacites thermiques) pp. [all data]
Notes
Go To: Top, Condensed phase thermochemistry data, References
- Symbols used in this document:
Cp,liquid Constant pressure heat capacity of liquid S°liquid Entropy of liquid at standard conditions ΔcH°liquid Enthalpy of combustion of liquid at standard conditions ΔfH°liquid Enthalpy of formation of liquid at standard conditions - Data from NIST Standard Reference Database 69: NIST Chemistry WebBook
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