Ethane, 1,1,1-trifluoro-
- Formula: C2H3F3
- Molecular weight: 84.0404
- IUPAC Standard InChIKey: UJPMYEOUBPIPHQ-UHFFFAOYSA-N
- CAS Registry Number: 420-46-2
- 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: Methylfluoroform; 1,1,1-Trifluoroethane; CH3CF3; Freon 143a; FC 143a; Fluorocarbon FC143a; R 143a; 1,1,1-Trifluoroform
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Gas phase thermochemistry data
Go To: Top, Condensed phase thermochemistry data, Gas phase ion energetics 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 | -178.94 ± 0.76 | kcal/mol | Eqk | Wu and Rodgers, 1974 | Reanalyzed by Kolesov and Papina, 1983, Original value = -178.2 ± 0.4 kcal/mol; Heat of formation Unpublished results by B.J. Zwolinski |
ΔfH°gas | -178.9 ± 0.4 | kcal/mol | Ccb | Kolesov, Martynov, et al., 1965 | Corrected for CODATA value of ΔfH; Authors hf298_gas[kcal/mol]=-174.1±0.4 |
Quantity | Value | Units | Method | Reference | Comment |
ΔcH°gas | -241.0 ± 0.4 | kcal/mol | Ccb | Kolesov, Martynov, et al., 1965 | Corrected for CODATA value of ΔfH; Authors hf298_gas[kcal/mol]=-174.1±0.4 |
Condensed phase thermochemistry data
Go To: Top, Gas phase thermochemistry data, Gas phase ion energetics 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: Eugene S. Domalski and Elizabeth D. Hearing
Quantity | Value | Units | Method | Reference | Comment |
---|---|---|---|---|---|
S°liquid | 53.561 | cal/mol*K | N/A | Russell, Golding, et al., 1944 |
Constant pressure heat capacity of liquid
Cp,liquid (cal/mol*K) | Temperature (K) | Reference | Comment |
---|---|---|---|
26.209 | 220. | Russell, Golding, et al., 1944 | T = 15 to 226 K. |
Gas phase ion energetics data
Go To: Top, Gas phase thermochemistry data, 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:
LLK - Sharon G. Lias, Rhoda D. Levin, and Sherif A. Kafafi
RDSH - Henry M. Rosenstock, Keith Draxl, Bruce W. Steiner, and John T. Herron
Ionization energy determinations
IE (eV) | Method | Reference | Comment |
---|---|---|---|
13.3 ± 0.1 | EI | Simmie and Tschuikow-Roux, 1971 | LLK |
13.8 | PE | Sauvageau, Doucet, et al., 1974 | Vertical value; LLK |
12.9 ± 0.1 | SI | Gol'denfel'd, Korostyshevskii, et al., 1973 | Vertical value; LLK |
Appearance energy determinations
Ion | AE (eV) | Other Products | Method | Reference | Comment |
---|---|---|---|---|---|
CF3+ | 13.9 | CH3 | PI | Loguinov, Takhistov, et al., 1981 | LLK |
CF3+ | 13.9 ± 0.1 | CH3 | EI | Simmie and Tschuikow-Roux, 1971 | LLK |
CF3+ | 13.90 ± 0.03 | CH3 | EI | Steele and Stone, 1962 | RDSH |
CH2+ | 16.2 ± 0.3 | ? | EI | Steele and Stone, 1962 | RDSH |
CH2F+ | 15.6 ± 0.2 | ? | EI | Steele and Stone, 1962 | RDSH |
CH3+ | 15.0 | CF3 | PI | Loguinov, Takhistov, et al., 1981 | LLK |
CH3+ | 15.0 ± 0.1 | ? | EI | Steele and Stone, 1962 | RDSH |
C2H2F+ | 15.8 ± 0.2 | ? | EI | Steele and Stone, 1962 | RDSH |
C2H2F2+ | 11.2 ± 0.1 | HF | EI | Steele and Stone, 1962 | RDSH |
C2H3F2+ | 14.9 | F | PI | Loguinov, Takhistov, et al., 1981 | LLK |
C2H3F2+ | 15.1 ± 0.1 | F | EI | Simmie and Tschuikow-Roux, 1971 | LLK |
C2H3F2+ | 14.9 ± 0.2 | F | EI | Steele and Stone, 1962 | RDSH |
References
Go To: Top, Gas phase thermochemistry data, Condensed phase thermochemistry data, Gas phase ion energetics data, Notes
Data compilation copyright by the U.S. Secretary of Commerce on behalf of the U.S.A. All rights reserved.
Wu and Rodgers, 1974
Wu, E.; Rodgers, A.S.,
Thermochemistry of gas-phase equilibrium CF3CH3 + I2 = CF3CH2I + HI. The carbon-hydrogen bond dissociation energy in 1,1,1-trifluoroethane and the heat of formation of the 2,2,2-trifluoroethyl radical,
J. Phys. Chem., 1974, 78, 2315-2317. [all data]
Kolesov and Papina, 1983
Kolesov, V.P.; Papina, T.S.,
Thermochemistry of Haloethanes,
Russ. Chem. Rev., 1983, 52, 425. [all data]
Kolesov, Martynov, et al., 1965
Kolesov, V.P.; Martynov, A.M.; Skuratov, S.M.,
Standard enthalpy of formation of 1,1,1-trifluoroethane,
Russ. J. Phys. Chem. (Engl. Transl.), 1965, 39, 223-225. [all data]
Russell, Golding, et al., 1944
Russell, H., Jr.; Golding, D.R.V.; Yost, D.M.,
The heat capacity, heats of transition, fusion and vaporization, vapor pressure and entropy of 1,1,1-trifluoroethane,
J. Am. Chem. Soc., 1944, 66, 16-20. [all data]
Simmie and Tschuikow-Roux, 1971
Simmie, J.M.; Tschuikow-Roux, E.,
Mass spectrum, appearance potentials and bond dissociation energies of 1,1,1-trifluoroethane,
Int. J. Mass Spectrom. Ion Phys., 1971, 7, 41. [all data]
Sauvageau, Doucet, et al., 1974
Sauvageau, P.; Doucet, J.; Gilbert, R.; Sandorfy, C.,
Vacuum ultraviolet and photoelectron spectra of fluoroethanes,
J. Chem. Phys., 1974, 61, 391. [all data]
Gol'denfel'd, Korostyshevskii, et al., 1973
Gol'denfel'd, I.V.; Korostyshevskii, I.Z.; Mischanchuk, B.G.; Pokrovskii, V.A.,
Determination of ionization potentials of atoms and molecules using a field mass spectrometer equipped with an energy analyzer,
Dokl. Akad. Nauk SSSR, 1973, 213, 626. [all data]
Loguinov, Takhistov, et al., 1981
Loguinov, Y.; Takhistov, V.V.; Vatlina, L.P.,
Photoionization studies of substituted trimethylamines,
Org. Mass Spectrom., 1981, 16, 239. [all data]
Steele and Stone, 1962
Steele, W.C.; Stone, F.G.A.,
An electron impact study of 1,1,1-trifluoroethane, 1,1,1-trifluoropropane and 3,3,3-trifluoropropene,
J. Am. Chem. Soc., 1962, 84, 3450. [all data]
Notes
Go To: Top, Gas phase thermochemistry data, Condensed phase thermochemistry data, Gas phase ion energetics data, References
- Symbols used in this document:
AE Appearance energy Cp,liquid Constant pressure heat capacity of liquid S°liquid Entropy of liquid at standard conditions ΔcH°gas Enthalpy of combustion of gas at standard conditions ΔfH°gas Enthalpy of formation of gas at standard conditions - Data from NIST Standard Reference Database 69: NIST Chemistry WebBook
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