Ethane, 1,1-difluoro-
- Formula: C2H4F2
- Molecular weight: 66.0500
- IUPAC Standard InChI: InChI=1S/C2H4F2/c1-2(3)4/h2H,1H3
- IUPAC Standard InChIKey: NPNPZTNLOVBDOC-UHFFFAOYSA-N
- CAS Registry Number: 75-37-6
- 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: Ethylidene fluoride; Algofrene Type 67; Freon 152a; FC 152a; Genetron 152a; R 152a; 1,1-Difluoroethane; CH3CHF2; Ethylidene difluoride; GENETRON 100; Propellant 152a; Halocarbon 152A; UN 1030; Dymel 152; Dymel 152A; HFC 152a
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Gas phase thermochemistry data
Go To: Top, Condensed phase thermochemistry data, Reaction 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 | -118.78 ± 0.95 | kcal/mol | Ccb | Kolesov, Shtekher, et al., 1968 | Reanalyzed by Kolesov and Papina, 1983, Original value = -117.3 ± 2.0 kcal/mol |
| Quantity | Value | Units | Method | Reference | Comment |
| ΔcH°gas | -291.5 ± 2.0 | kcal/mol | Ccb | Kolesov, Shtekher, et al., 1968 |
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: Eugene S. Domalski and Elizabeth D. Hearing
Constant pressure heat capacity of liquid
| Cp,liquid (cal/mol*K) | Temperature (K) | Reference | Comment |
|---|---|---|---|
| 28.038 | 300. | Nakagawa, Hori, et al., 1993 | T = 276 to 360 K. p = 0.629 MPa. |
| 28.30 | 298.17 | Porichanskii, Ponomareva, et al., 1982 | T = 220 to 425 K. Unsmoothed experimental datum. Cp data given as 1.793 J/g*K. |
Reaction thermochemistry 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:
B - John E. Bartmess
M - Michael M. Meot-Ner (Mautner) and Sharon G. Lias
ALS - Hussein Y. Afeefy, Joel F. Liebman, and Stephen E. Stein
Note: Please consider using the reaction search for this species. This page allows searching of all reactions involving this species. A general reaction search form is also available. Future versions of this site may rely on reaction search pages in place of the enumerated reaction displays seen below.
Individual Reactions
+
= (
•
)
By formula: Cl- + C2H4F2 = (Cl- • C2H4F2)
| Quantity | Value | Units | Method | Reference | Comment |
|---|---|---|---|---|---|
| ΔrH° | 14.9 ± 2.0 | kcal/mol | IMRE | Larson and McMahon, 1984 | gas phase; B,M |
| Quantity | Value | Units | Method | Reference | Comment |
| ΔrS° | 22.7 | cal/mol*K | N/A | Larson and McMahon, 1984 | gas phase; switching reaction(Cl-)CF3H, Entropy change calculated or estimated; Larson and McMahon, 1984, 2; M |
| Quantity | Value | Units | Method | Reference | Comment |
| ΔrG° | 8.1 ± 2.0 | kcal/mol | IMRE | Larson and McMahon, 1984 | gas phase; B,M |
3 +
=
+ 2
By formula: 3H2 + C2Cl2F2 = C2H4F2 + 2HCl
| Quantity | Value | Units | Method | Reference | Comment |
|---|---|---|---|---|---|
| ΔrH° | -83.33 | kcal/mol | Chyd | Lacher, Kianpour, et al., 1956 | gas phase; At 410 K; ALS |
2 +
=
+
By formula: 2H2 + C2HClF2 = C2H4F2 + HCl
| Quantity | Value | Units | Method | Reference | Comment |
|---|---|---|---|---|---|
| ΔrH° | -61.77 | kcal/mol | Chyd | Lacher, Kianpour, et al., 1956 | gas phase; At 410 K; ALS |
+
=
+
By formula: C2H4F2 + I2 = HI + C2H3BrF2
| Quantity | Value | Units | Method | Reference | Comment |
|---|---|---|---|---|---|
| ΔrH° | 12.2 ± 0.2 | kcal/mol | Eqk | Pickard and Rodgers, 1977 | gas phase; ALS |
+
=
By formula: C2H3F + HF = C2H4F2
| Quantity | Value | Units | Method | Reference | Comment |
|---|---|---|---|---|---|
| ΔrH° | -12. | kcal/mol | Eqk | Moore, 1971 | gas phase; ALS |
References
Go To: Top, Gas phase thermochemistry data, Condensed phase thermochemistry data, Reaction thermochemistry data, Notes
Data compilation copyright by the U.S. Secretary of Commerce on behalf of the U.S.A. All rights reserved.
Kolesov, Shtekher, et al., 1968
Kolesov, V.P.; Shtekher, S.N.; Martynov, A.M.; Skuratov, S.M.,
Standard enthalpy of formation of 1,1-difluoroethane,
Russ. J. Phys. Chem. (Engl. Transl.), 1968, 42, 975-976. [all data]
Kolesov and Papina, 1983
Kolesov, V.P.; Papina, T.S.,
Thermochemistry of Haloethanes,
Russ. Chem. Rev., 1983, 52, 425. [all data]
Nakagawa, Hori, et al., 1993
Nakagawa, S.; Hori, T.; Sato, H.,
and Watanabe K., Isobaric heat capacity for liquid 1-chloro-1,1-difluorethane and 1,1-difluoroethane,
J. Chem. Eng. Data, 1993, 38(1), 70-74. [all data]
Porichanskii, Ponomareva, et al., 1982
Porichanskii, E.G.; Ponomareva, O.P.; Svetlichnyi, P.I.,
Study of the isobaric heat capacity of Freon 152A in a wide range of parametric conditions, Izv. Vyssh. Uchebn. Zaved.,
Energ., 1982, (3), 122-125. [all data]
Larson and McMahon, 1984
Larson, J.W.; McMahon, T.B.,
Hydrogen bonding in gas phase anions. An experimental investigation of the interaction between chloride ion and bronsted acids from ICR chloride exchange equilibria,
J. Am. Chem. Soc., 1984, 106, 517. [all data]
Larson and McMahon, 1984, 2
Larson, J.W.; McMahon, T.B.,
Gas phase negative ion chemistry of alkylchloroformates,
Can. J. Chem., 1984, 62, 675. [all data]
Lacher, Kianpour, et al., 1956
Lacher, J.R.; Kianpour, A.; Oetting, F.; Park, J.D.,
Reaction calorimetry. The hydrogenation of organic fluorides and chlorides,
Trans. Faraday Soc., 1956, 52, 1500-1508. [all data]
Pickard and Rodgers, 1977
Pickard, J.M.; Rodgers, A.S.,
The kinetics and thermochemistry of the reaction of 1,1-difluoroethane with iodine. The difluoromethylene-hydrogen bond dissociation energy in 1,1-difluoroethane and the heat of formation of 1,1-difluoroethyl,
J. Am. Chem. Soc., 1977, 99, 691-694. [all data]
Moore, 1971
Moore, L.O.,
Kinetics and thermodynamic data for the hydrogen fluoride addition to vinyl fluoride,
Can. J. Chem., 1971, 49, 2471-2475. [all data]
Notes
Go To: Top, Gas phase thermochemistry data, Condensed phase thermochemistry data, Reaction thermochemistry data, References
- Symbols used in this document:
Cp,liquid Constant pressure heat capacity of liquid ΔcH°gas Enthalpy of combustion of gas at standard conditions ΔfH°gas Enthalpy of formation of gas at standard conditions ΔrG° Free energy of reaction at standard conditions ΔrH° Enthalpy of reaction at standard conditions ΔrS° Entropy of reaction at standard conditions - Data from NIST Standard Reference Database 69: NIST Chemistry WebBook
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