Benzene, 1,1',1'',1'''-(1,2-ethanediylidene)tetrakis-
- Formula: C26H22
- Molecular weight: 334.4529
- IUPAC Standard InChI: InChI=1S/C26H22/c1-5-13-21(14-6-1)25(22-15-7-2-8-16-22)26(23-17-9-3-10-18-23)24-19-11-4-12-20-24/h1-20,25-26H
- IUPAC Standard InChIKey: RUGHUJBHQWALKM-UHFFFAOYSA-N
- CAS Registry Number: 632-50-8
- 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: Ethane, 1,1,2,2-tetraphenyl-; α,α,β,β-Tetraphenylethane; sym-Tetraphenylethane; Bibenzhydryl; 1,1,2,2-Tetraphenylethane
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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 by: Hussein Y. Afeefy, Joel F. Liebman, and Stephen E. Stein
| Quantity | Value | Units | Method | Reference | Comment |
|---|---|---|---|---|---|
| ΔfH°gas | 85.4 ± 1.3 | kcal/mol | Ccb | Beckhaus, Dogan, et al., 1990 |
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°solid | 52.7 ± 0.8 | kcal/mol | Ccb | Beckhaus, Dogan, et al., 1990 | ALS |
| Quantity | Value | Units | Method | Reference | Comment |
| ΔcH°solid | -3249.5 ± 0.8 | kcal/mol | Ccb | Beckhaus, Dogan, et al., 1990 | Corresponding ΔfHºsolid = 52.7 kcal/mol (simple calculation by NIST; no Washburn corrections); ALS |
| ΔcH°solid | -3248.42 ± 0.31 | kcal/mol | Ccb | Coops, Mulder, et al., 1953 | Reanalyzed by Cox and Pilcher, 1970, Original value = -3249.3 ± 0.7 kcal/mol; See Coops, Mulder, et al., 1946; Corresponding ΔfHºsolid = 51.63 kcal/mol (simple calculation by NIST; no Washburn corrections); ALS |
Constant pressure heat capacity of solid
| Cp,solid (cal/mol*K) | Temperature (K) | Reference | Comment |
|---|---|---|---|
| 95.51 | 298.5 | Smith and Andrews, 1931 | T = 102 to 346 K. Value is unsmoothed experimental datum.; 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.
Beckhaus, Dogan, et al., 1990
Beckhaus, H.D.; Dogan, B.; Schaetzer, J.; Hellmann, S.; Ruchardt, C.,
Thermische stabilitat und bildungsenthalpie von 1,2,2,2- und 1,1,1,2- tetraphenylethan. - Die stabilisierungsenergien von benzhydryl- und triphenylmethyl-radikalen,
Chem. Ber., 1990, 123, 137-144. [all data]
Coops, Mulder, et al., 1953
Coops, J.; Mulder, D.; Dienske, J.W.; Smittenberg, J.,
Thermochemical investigations on arylethanes I. Heats of combustion of phenylethanes.,
Rec. Trav. Chim. Pays/Bas, 1953, 72, 785. [all data]
Cox and Pilcher, 1970
Cox, J.D.; Pilcher, G.,
Thermochemistry of Organic and Organometallic Compounds, Academic Press, New York, 1970, 1-636. [all data]
Coops, Mulder, et al., 1946
Coops, J.; Mulder, D.; Dienske, J.W.; Smittenberg, J.,
The heats of combustion of a number of hydrocarbons,
Rec. Trav. Chim. Pays/Bas, 1946, 65, 128. [all data]
Smith and Andrews, 1931
Smith, R.H.; Andrews, D.H.,
Thermal energy studies. I. Phenyl derivatives of methane,
ethane and some related compounds. J. Am. Chem. Soc., 1931, 53, 3644-3660. [all data]
Notes
Go To: Top, Gas phase thermochemistry data, Condensed phase thermochemistry data, References
- Symbols used in this document:
Cp,solid Constant pressure heat capacity of solid ΔcH°solid Enthalpy of combustion of solid at standard conditions ΔfH°gas Enthalpy of formation of gas at standard conditions ΔfH°solid Enthalpy of formation of solid at standard conditions - Data from NIST Standard Reference Database 69: NIST Chemistry WebBook
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