Ethene, 1,1-difluoro-
- Formula: C2H2F2
- Molecular weight: 64.0341
- IUPAC Standard InChIKey: BQCIDUSAKPWEOX-UHFFFAOYSA-N
- CAS Registry Number: 75-38-7
- 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: Ethylene, 1,1-difluoro-; Genetron 1132a; Vinylidene difluoride; Vinylidene fluoride; 1,1-Difluoroethene; 1,1-Difluoroethylene; CH2=CF2; Halocarbon 1132A; NCI-C60208; UN 1959; VDF; FC 1132a
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Reaction thermochemistry data
Go To: Top, 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: John E. Bartmess
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: F- + C2H2F2 = (F- • C2H2F2)
Quantity | Value | Units | Method | Reference | Comment |
---|---|---|---|---|---|
ΔrH° | 112. ± 21. | kJ/mol | Ther | Sullivan and Beauchamp, 1976 | gas phase; From CH3CF3 |
Gas phase ion energetics data
Go To: Top, 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 evaluated as indicated in comments:
HL - Edward P. Hunter and Sharon G. Lias
L - Sharon G. Lias
Data compiled as indicated in comments:
LBLHLM - Sharon G. Lias, John E. Bartmess, Joel F. Liebman, John L. Holmes, Rhoda D. Levin, and W. Gary Mallard
LLK - Sharon G. Lias, Rhoda D. Levin, and Sherif A. Kafafi
RDSH - Henry M. Rosenstock, Keith Draxl, Bruce W. Steiner, and John T. Herron
View reactions leading to C2H2F2+ (ion structure unspecified)
Quantity | Value | Units | Method | Reference | Comment |
---|---|---|---|---|---|
IE (evaluated) | 10.29 ± 0.01 | eV | N/A | N/A | L |
Quantity | Value | Units | Method | Reference | Comment |
Proton affinity (review) | 734. | kJ/mol | N/A | Hunter and Lias, 1998 | HL |
Quantity | Value | Units | Method | Reference | Comment |
Gas basicity | 705.1 | kJ/mol | N/A | Hunter and Lias, 1998 | HL |
Ionization energy determinations
IE (eV) | Method | Reference | Comment |
---|---|---|---|
10.29 | PI | Frenking, Koch, et al., 1984 | LBLHLM |
10.29 ± 0.02 | PE | Bieri, Niessen, et al., 1981 | LLK |
10.29 | PE | Sell, Mintz, et al., 1978 | LLK |
10.29 ± 0.01 | PI | Reinke, Kraessig, et al., 1973 | LLK |
10.31 | PE | Lake and Thompson, 1970 | RDSH |
10.31 ± 0.02 | PI | Momigny, 1963 | RDSH |
10.30 | PI | Bralsford, Harris, et al., 1960 | RDSH |
10.70 ± 0.02 | PE | Bieri, Niessen, et al., 1981 | Vertical value; LLK |
10.69 ± 0.02 | PE | Sell and Kuppermann, 1979 | Vertical value; LLK |
Appearance energy determinations
Ion | AE (eV) | Other Products | Method | Reference | Comment |
---|---|---|---|---|---|
CF+ | 14.92 | CH2F | PI | Frenking, Koch, et al., 1984 | LBLHLM |
CF+ | 14.92 ± 0.02 | CH2F | PI | Reinke, Kraessig, et al., 1973 | LLK |
CF+ | 15.23 | ? | EI | Lifshitz and Long, 1963 | RDSH |
CH2+ | 16.99 ± 0.02 | CF2 | PI | Reinke, Kraessig, et al., 1973 | LLK |
CH2+ | 17.2 ± 0.1 | CF2 | EI | Syrvatka, Bel'ferman, et al., 1971 | LLK |
CH2+ | 17.8 | CF2 | EI | Lifshitz and Long, 1963 | RDSH |
CH2F+ | 14.84 | CF | PI | Frenking, Koch, et al., 1984 | LBLHLM |
CH2F+ | 14.84 ± 0.02 | CF | PI | Reinke, Kraessig, et al., 1973 | LLK |
CH2F+ | 15.08 | CF | EI | Lifshitz and Long, 1963 | RDSH |
C2HF+ | 14.18 | HF | PI | Frenking, Koch, et al., 1984 | LBLHLM |
C2HF+ | 14.18 ± 0.03 | HF | PI | Reinke, Kraessig, et al., 1973 | LLK |
C2HF+ | 14.44 | HF | EI | Lifshitz and Long, 1963 | RDSH |
C2HF2+ | 15.80 ± 0.04 | H | PI | Reinke, Kraessig, et al., 1973 | LLK |
C2HF2+ | 16.67 | H | EI | Lifshitz and Long, 1963 | RDSH |
C2H2+ | 19.08 ± 0.03 | 2F | PI | Reinke, Kraessig, et al., 1973 | LLK |
C2H2+ | 19.8 ± 0.1 | ? | EI | Lifshitz and Long, 1963 | RDSH |
C2H2F+ | 14.37 | F | PI | Frenking, Koch, et al., 1984 | LBLHLM |
C2H2F+ | 14.37 ± 0.02 | F | PI | Reinke, Kraessig, et al., 1973 | LLK |
C2H2F+ | 14.80 | F | EI | Lifshitz and Long, 1963 | RDSH |
References
Go To: Top, Reaction 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.
Sullivan and Beauchamp, 1976
Sullivan, S.A.; Beauchamp, J.L.,
Competition between proton transfer and elimination in the reactions of strong bases with fluoroethanes in the gas phase. Influence of base strength on reactivity,
J. Am. Chem. Soc., 1976, 98, 1160. [all data]
Hunter and Lias, 1998
Hunter, E.P.; Lias, S.G.,
Evaluated Gas Phase Basicities and Proton Affinities of Molecules: An Update,
J. Phys. Chem. Ref. Data, 1998, 27, 3, 413-656, https://doi.org/10.1063/1.556018
. [all data]
Frenking, Koch, et al., 1984
Frenking, G.; Koch, W.; Schaale, M.; Baumgartel, H.,
The unimolecular decay of difluoroethene cations. An experimental and quantum-chemical study,
Int. J. Mass Spectrom. Ion Phys., 1984, 61, 305. [all data]
Bieri, Niessen, et al., 1981
Bieri, G.; Niessen, W.V.; Asbrink, L.; Svensson, A.,
The He(II) photoelectron spectra of the fluorosubstituted ethylenes and their analysis by the green's function method,
Chem. Phys., 1981, 60, 61. [all data]
Sell, Mintz, et al., 1978
Sell, J.A.; Mintz, D.M.; Kupperman, A.,
Photoelectron angular distributions of carbon-carbon π electrons in ethylene, benzene, and their fluorinated derivatives,
Chem. Phys. Lett., 1978, 58, 601. [all data]
Reinke, Kraessig, et al., 1973
Reinke, D.; Kraessig, R.; Baumgartel, H.,
Photoreactions of small organic molecules,
Z. Naturforsch. A:, 1973, 28, 1021. [all data]
Lake and Thompson, 1970
Lake, R.F.; Thompson, H.,
Photoelectron spectra of halogenated ethylenes,
Proc. Roy. Soc. (London), 1970, A315, 323. [all data]
Momigny, 1963
Momigny, J.,
Ionization potentials and the structures of the photo-ionization yield curves of ethylene and its halogeno derivatives,
Nature, 1963, 199, 1179. [all data]
Bralsford, Harris, et al., 1960
Bralsford, R.; Harris, P.V.; Price, W.C.,
The effect of fluorine on the electronic spectra and ionization potentials of molecules,
Proc. Roy. Soc. (London), 1960, A258, 459. [all data]
Sell and Kuppermann, 1979
Sell, J.A.; Kuppermann, A.,
Variable angle photoelectron spectroscopy of the fluoroethylenes,
J. Chem. Phys., 1979, 71, 4703. [all data]
Lifshitz and Long, 1963
Lifshitz, C.; Long, F.A.,
Appearance potentials and mass spectra of fluorinated ethylenes. I. Decomposition mechanisms and their energetics,
J. Phys. Chem., 1963, 67, 2463. [all data]
Syrvatka, Bel'ferman, et al., 1971
Syrvatka, B.G.; Bel'ferman, A.L.; Gil'burd, M.M.; Moin, F.B.,
Determination of the dissociation energy of the double bond in some fluorochloro-substituted ethylenes and their ions by electron bombardment,
J. Org. Chem. USSR, 1971, 7, 8, In original 9. [all data]
Notes
Go To: Top, Reaction thermochemistry data, Gas phase ion energetics data, References
- Symbols used in this document:
AE Appearance energy IE (evaluated) Recommended ionization energy ΔrH° Enthalpy of reaction at standard conditions - Data from NIST Standard Reference Database 69: NIST Chemistry WebBook
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