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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Reaction 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:
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
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Individual Reactions
+
= (
•
)
By formula: Cl- + C2H4F2 = (Cl- • C2H4F2)
| Quantity | Value | Units | Method | Reference | Comment |
|---|---|---|---|---|---|
| ΔrH° | 62.3 ± 8.4 | kJ/mol | IMRE | Larson and McMahon, 1984 | gas phase; B,M |
| Quantity | Value | Units | Method | Reference | Comment |
| ΔrS° | 95.0 | J/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° | 34. ± 8.4 | kJ/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° | -348.7 | kJ/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° | -258.4 | kJ/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° | 51.0 ± 0.8 | kJ/mol | Eqk | Pickard and Rodgers, 1977 | gas phase; ALS |
+
=
By formula: C2H3F + HF = C2H4F2
| Quantity | Value | Units | Method | Reference | Comment |
|---|---|---|---|---|---|
| ΔrH° | -50. | kJ/mol | Eqk | Moore, 1971 | gas phase; ALS |
References
Go To: Top, Reaction thermochemistry data, Notes
Data compilation copyright by the U.S. Secretary of Commerce on behalf of the U.S.A. All rights reserved.
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, Reaction thermochemistry data, References
- Symbols used in this document:
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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