2,5-Norbornadiene
- Formula: C7H8
- Molecular weight: 92.1384
- IUPAC Standard InChI: InChI=1S/C7H8/c1-2-7-4-3-6(1)5-7/h1-4,6-7H,5H2
- IUPAC Standard InChIKey: SJYNFBVQFBRSIB-UHFFFAOYSA-N
- CAS Registry Number: 121-46-0
- 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. - Other names: Bicyclo[2.2.1]hepta-2,5-diene; Bicyclo[2.2.1]heptadiene; Norbornadiene; 3,6-Methano-1,4-cyclohexadiene; Dicycloheptadiene; Bicyclo[2.2.1]-2,5-heptadiene; NSC 13672; 8,9,10-trinorborna-2,5-diene
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Gas phase thermochemistry 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
GT - Glushko Thermocenter, Russian Academy of Sciences, Moscow
| Quantity | Value | Units | Method | Reference | Comment |
|---|---|---|---|---|---|
| ΔfH°gas | 57. ± 6. | kcal/mol | AVG | N/A | Average of 6 values; Individual data points |
Constant pressure heat capacity of gas
| Cp,gas (cal/mol*K) | Temperature (K) | Reference | Comment |
|---|---|---|---|
| 25.239 | 298.15 | Walsh R., 1975 | Selected value of S(298.15 K) is in excellent agreement with that calculated by force field method [ Lenz T.G., 1989].; GT |
| 25.421 | 300. | ||
| 34.529 | 400. | ||
| 42.151 | 500. | ||
| 48.279 | 600. | ||
| 53.250 | 700. | ||
| 57.349 | 800. | ||
| 60.791 | 900. | ||
| 63.690 | 1000. |
Condensed phase thermochemistry data
Go To: Top, Gas 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
DH - Eugene S. Domalski and Elizabeth D. Hearing
| Quantity | Value | Units | Method | Reference | Comment |
|---|---|---|---|---|---|
| ΔfH°liquid | 51.10 ± 0.72 | kcal/mol | Ccb | Steele, 1978 | ALS |
| ΔfH°liquid | 42.72 ± 0.24 | kcal/mol | Ccb | Hall, Smith, et al., 1973 | ALS |
| Quantity | Value | Units | Method | Reference | Comment |
| ΔcH°liquid | -982.72 ± 0.72 | kcal/mol | Ccb | Steele, 1978 | Corresponding ΔfHºliquid = 51.10 kcal/mol (simple calculation by NIST; no Washburn corrections); ALS |
| ΔcH°liquid | -974.35 ± 0.24 | kcal/mol | Ccb | Hall, Smith, et al., 1973 | Corresponding ΔfHºliquid = 42.73 kcal/mol (simple calculation by NIST; no Washburn corrections); ALS |
| ΔcH°liquid | -979.6 | kcal/mol | Ccb | Skuratov, Kozina, et al., 1958 | Corresponding ΔfHºliquid = 48.0 kcal/mol (simple calculation by NIST; no Washburn corrections); ALS |
Constant pressure heat capacity of liquid
| Cp,liquid (cal/mol*K) | Temperature (K) | Reference | Comment |
|---|---|---|---|
| 38.53 | 298.15 | Steele, 1978 | DH |
| 27.75 | 297. | Hall, Smith, et al., 1973 | DH |
References
Go To: Top, Gas phase thermochemistry data, 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.
Walsh R., 1975
Walsh R.,
The enthalpy of formation of bicyclo[2.2.1]hepta-2,5-diene. Thermodynamic functions of bicyclo[2.2.1]heptane and bicyclo[2.2.1]hepta-2,5-diene,
J. Chem. Thermodyn., 1975, 7, 149-154. [all data]
Lenz T.G., 1989
Lenz T.G.,
Force-field calculations giving accurate conformation, Hf(T), S(T), and Cp(T) for unsaturated acyclic and cyclic hydrocarbons,
J. Phys. Chem., 1989, 93, 1588-1592. [all data]
Steele, 1978
Steele, W.V.,
The standard enthalpies of formation of a series of C7, bridged-ring hydrocarbons: norbornane, norbornene, nortricyclene, norbornadiene, and quadricyclane,
J. Chem. Thermodyn., 1978, 10, 919-927. [all data]
Hall, Smith, et al., 1973
Hall, H.K., Jr.; Smith, C.D.; Baldt, J.H.,
Enthalpies of formation of norticyclene, norbornene, norbornadiene, and quadricyclane,
J. Am. Chem. Soc., 1973, 95, 3197-3201. [all data]
Skuratov, Kozina, et al., 1958
Skuratov, S.M.; Kozina, M.P.; Shtocher, S.M.; Prevalova, N.M.; Kamkina, L.S.; Zuko, V.D.,
Heats of combustion of cyclic compounds,
Bull. Chem. Thermodyn., 1958, 1, 21. [all data]
Notes
Go To: Top, Gas phase thermochemistry data, Condensed phase thermochemistry data, References
- Symbols used in this document:
Cp,gas Constant pressure heat capacity of gas Cp,liquid Constant pressure heat capacity of liquid ΔcH°liquid Enthalpy of combustion of liquid at standard conditions ΔfH°gas Enthalpy of formation of gas 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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