Ethene, tetrafluoro-

Formula: C₂F₄
Molecular weight: 100.0150
IUPAC Standard InChI: InChI=1S/C2F4/c3-1(4)2(5)6
IUPAC Standard InChIKey: BFKJFAAPBSQJPD-UHFFFAOYSA-N
CAS Registry Number: 116-14-3
Chemical structure:
This structure is also available as a 2d Mol file or as a computed 3d SD file
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Other names: Ethylene, tetrafluoro-; Perfluoroethene; Perfluoroethylene; Tetrafluoroethene; Tetrafluoroethylene; TFE; C2F4; Fluoroplast 4; Tetrafluorethylene; 1,1,2,2-Tetrafluoroethylene; Tetrafluorethene; Ethene, 1,1,2,2-tetrafluoro-
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Reaction thermochemistry data

Go To: Top, References, Notes

Data compiled as indicated in comments:
B - John E. Bartmess
MS - José A. Martinho Simões
ALS - Hussein Y. Afeefy, Joel F. Liebman, and Stephen E. Stein

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Individual Reactions

+ Ethene, tetrafluoro- = C₂ClF₄^-

By formula: Cl^- + C₂F₄ = C₂ClF₄^-

Quantity	Value	Units	Method	Reference	Comment
Δ_rH°	>10.00	kcal/mol	TDAs	Hiraoka, Mochizuki, et al., 2008	gas phase; Entropy estimated. The experimental HOF of C2F4 has been quiestioned as being too positive: Curtiss, Raghavachari, et al., 7374, 11CHA/DEN; B
Quantity	Value	Units	Method	Reference	Comment
Δ_rG°	2.55	kcal/mol	TDAs	Hiraoka, Mochizuki, et al., 2008	gas phase; Entropy estimated. The experimental HOF of C2F4 has been quiestioned as being too positive: Curtiss, Raghavachari, et al., 7374, 11CHA/DEN; B

+ Ethene, tetrafluoro- = C₂BrF₄^-

By formula: Br^- + C₂F₄ = C₂BrF₄^-

Quantity	Value	Units	Method	Reference	Comment
Δ_rH°	7.10 ± 0.50	kcal/mol	TDAs	Hiraoka, Mochizuki, et al., 2008	gas phase; The experimental HOF of C2F4 has been questioned as being too positive: Curtiss, Raghavachari, et al., 7374, 11CHA/DEN; B
Quantity	Value	Units	Method	Reference	Comment
Δ_rG°	2.33 ± 0.50	kcal/mol	TDAs	Hiraoka, Mochizuki, et al., 2008	gas phase; The experimental HOF of C2F4 has been questioned as being too positive: Curtiss, Raghavachari, et al., 7374, 11CHA/DEN; B

C₇CrF₄O₅ (g) = Ethene, tetrafluoro- (g) + C₅CrO₅ (g)

By formula: C₇CrF₄O₅ (g) = C₂F₄ (g) + C₅CrO₅ (g)

Quantity	Value	Units	Method	Reference	Comment
Δ_rH°	19.7 ± 1.4	kcal/mol	KinG	Wells, House, et al., 1994	The reaction enthalpy relies on the measured activation energy and on the assumption of a negligible barrier for product recombination Wells, House, et al., 1994.; MS

C₂ClF₄^- + 2 Ethene, tetrafluoro- = C₄ClF₈^-

By formula: C₂ClF₄^- + 2C₂F₄ = C₄ClF₈^-

Quantity	Value	Units	Method	Reference	Comment
Δ_rH°	6.60 ± 0.50	kcal/mol	TDAs	Hiraoka, Mochizuki, et al., 2008	gas phase; B
Quantity	Value	Units	Method	Reference	Comment
Δ_rG°	1.83 ± 0.50	kcal/mol	TDAs	Hiraoka, Mochizuki, et al., 2008	gas phase; B

C₄ClF₈^- + 3 Ethene, tetrafluoro- = C₆ClF₁₂^-

By formula: C₄ClF₈^- + 3C₂F₄ = C₆ClF₁₂^-

Quantity	Value	Units	Method	Reference	Comment
Δ_rH°	6.30 ± 0.50	kcal/mol	TDAs	Hiraoka, Mochizuki, et al., 2008	gas phase; B
Quantity	Value	Units	Method	Reference	Comment
Δ_rG°	0.64 ± 0.50	kcal/mol	TDAs	Hiraoka, Mochizuki, et al., 2008	gas phase; B

C₆ClF₁₂^- + 4 Ethene, tetrafluoro- = C₈ClF₁₆^-

By formula: C₆ClF₁₂^- + 4C₂F₄ = C₈ClF₁₆^-

Quantity	Value	Units	Method	Reference	Comment
Δ_rH°	6.00 ± 0.50	kcal/mol	TDAs	Hiraoka, Mochizuki, et al., 2008	gas phase; B
Quantity	Value	Units	Method	Reference	Comment
Δ_rG°	0.04 ± 0.50	kcal/mol	TDAs	Hiraoka, Mochizuki, et al., 2008	gas phase; B

C₂BrF₄^- + 2 Ethene, tetrafluoro- = C₄BrF₈^-

By formula: C₂BrF₄^- + 2C₂F₄ = C₄BrF₈^-

Quantity	Value	Units	Method	Reference	Comment
Δ_rH°	6.00 ± 0.50	kcal/mol	TDAs	Hiraoka, Mochizuki, et al., 2008	gas phase; B
Quantity	Value	Units	Method	Reference	Comment
Δ_rG°	0.93 ± 0.50	kcal/mol	TDAs	Hiraoka, Mochizuki, et al., 2008	gas phase; B

+ Ethene, tetrafluoro- =

By formula: HBr + C₂F₄ = C₂HBrF₄

Quantity	Value	Units	Method	Reference	Comment
Δ_rH°	-32.92 ± 0.18	kcal/mol	Cm	Lacher, Lea, et al., 1950	gas phase; Heat of hydrobromination at 367°K; ALS

= Ethene, tetrafluoro- +

By formula: C₂F₄I₂ = C₂F₄ + I₂

Quantity	Value	Units	Method	Reference	Comment
Δ_rH°	16.6 ± 0.5	kcal/mol	Eqk	Wu, Pickard, et al., 1975	gas phase; Spectrophotometery at 298.15°K; ALS

Ethene, tetrafluoro- + =

By formula: C₂F₄ + Cl₂ = C₂Cl₂F₄

Quantity	Value	Units	Method	Reference	Comment
Δ_rH°	-57.32 ± 0.20	kcal/mol	Cm	Lacher, McKinley, et al., 1949	gas phase; Chlorination at 90 C; ALS

Ethene, tetrafluoro- + 2 = 2 + 4

By formula: C₂F₄ + 2H₂ = 2C + 4HF

Quantity	Value	Units	Method	Reference	Comment
Δ_rH°	-147.8 ± 1.1	kcal/mol	Chyd	Neugebauer and Margrave, 1956	gas phase; ALS

Ethene, tetrafluoro- + =

By formula: C₂F₄ + Br₂ = C₂Br₂F₄

Quantity	Value	Units	Method	Reference	Comment
Δ_rH°	-38.48	kcal/mol	Cm	Lacher, Casali, et al., 1956	gas phase; Heat of bromination; ALS

Ethene, tetrafluoro- + 4 = 4 + 2

By formula: C₂F₄ + 4Na = 4FNa + 2C

Quantity	Value	Units	Method	Reference	Comment
Δ_rH°	-385.0 ± 1.1	kcal/mol	Cm	Kolesov, Zenkov, et al., 1962	gas phase; ALS

2 = Ethene, tetrafluoro- + 2

By formula: 2CHClF₂ = C₂F₄ + 2HCl

Quantity	Value	Units	Method	Reference	Comment
Δ_rH°	29.06	kcal/mol	Kin	Edwards and Small, 1965	gas phase; Corrected for CODATA value of Δ_fH; ALS

2 Ethene, tetrafluoro- =

By formula: 2C₂F₄ = C₄F₈

Quantity	Value	Units	Method	Reference	Comment
Δ_rH°	-50.3	kcal/mol	Eqk	Atkinson and Trenwith, 1953	gas phase; At 527-800 °K; ALS

Ethene, tetrafluoro- + 2 = 2

By formula: C₂F₄ + 2F₂ = 2CF₄

Quantity	Value	Units	Method	Reference	Comment
Δ_rH°	-247.92	kcal/mol	Ccb	Domalski and Armstrong, 1967	solid phase; ALS

= Ethene, tetrafluoro- +

By formula: C₂Br₂F₄ = C₂F₄ + Br₂

Quantity	Value	Units	Method	Reference	Comment
Δ_rH°	38.478	kcal/mol	Cm	Lacher, Casali, et al., 1956	gas phase; ALS

References

Go To: Top, Reaction thermochemistry data, Notes

Hiraoka, Mochizuki, et al., 2008
Hiraoka, K.; Mochizuki, N.; Wada, A.; Okada, H.; Ichikawa, T.; Asakawa, D.; Yazawa, I., Gas-phase ion/molecule reactions in C2F4, Int. J. Mass Spectrom., 2008, 272, 1, 22-28, https://doi.org/10.1016/j.ijms.2007.12.013 . [all data]

Curtiss, Raghavachari, et al., 7374
Curtiss, L.A.; Raghavachari, K.; Redfern, P.C.; Pople, J.A., Assesment of Gaussian-3 and density Functional Theories for a larger experimental test set, J. Chem. Phys. 112 (2000), 7374. [all data]

Wells, House, et al., 1994
Wells, J.R.; House, P.G.; Weitz, E., J. Phys. Chem., 1994, 98, 8343. [all data]

Lacher, Lea, et al., 1950
Lacher, J.R.; Lea, K.R.; Walden, C.H.; Olson, G.G.; Park, J.D., Reaction heats of organic fluorine compounds. III. The vapor phase heats of hydrobromination of some simple fluoroolefins, J. Am. Chem. Soc., 1950, 72, 3231-3234. [all data]

Wu, Pickard, et al., 1975
Wu, E.C.; Pickard, J.M.; Rodgers, A.S., Thermochemistry of the gas-phase reaction tetrafluoroethylene + iodine = 1,2-diiodoperfluoroethane. Heat of formation of 1,2-diiodoperfluoroethane and of iodoperfluoroethane, J. Phys. Chem., 1975, 79, 1078-1081. [all data]

Lacher, McKinley, et al., 1949
Lacher, J.R.; McKinley, J.J.; Snow, C.M.; Michel, L.; Nelson, G.; Park, J.D., Reaction heats of organic fluorine compounds. I. Apparatus and the heat of chlorination of tetrafluoroethylene, J. Am. Chem. Soc., 1949, 71, 1330-1334. [all data]

Neugebauer and Margrave, 1956
Neugebauer, C.A.; Margrave, J.L., The heats of formation of tetrafluoroethylene, tetrafluoromethane and 1,1-difluoroethylene, J. Phys. Chem., 1956, 60, 1318-1321. [all data]

Lacher, Casali, et al., 1956
Lacher, J.R.; Casali, L.; Park, J.D., Reaction heats of organic halogen compounds V. The vapor phase bromination of tetrafluoroethylene and trifluorochloroethylene, J. Phys. Chem., 1956, 60, 608-610. [all data]

Kolesov, Zenkov, et al., 1962
Kolesov, V.P.; Zenkov, I.D.; Skuratov, S.M., The standard enthalpy of formation of tetrafluoroethylene, Russ. J. Phys. Chem. (Engl. Transl.), 1962, 36, 45-47. [all data]

Edwards and Small, 1965
Edwards, J.W.; Small, P.A., Kinetics of the pyrolysis of chlorodifluoromethane, Ind. Eng. Chem. Fundam., 1965, 4, 396-400. [all data]

Atkinson and Trenwith, 1953
Atkinson, B.; Trenwith, A.B., 424. The thermal decomposition of tetrafluorethylene, J. Chem. Soc. London, 1953, 2082-2087. [all data]

Domalski and Armstrong, 1967
Domalski, E.S.; Armstrong, G.T., The heats of combustion of polytetrafluoroethylene (teflon) and graphite in elemental fluorine, J. Res. NBS, 1967, 71, 105-118. [all data]

Notes

Go To: Top, Reaction thermochemistry data, References

Symbols used in this document:

Δ_rG° Free energy of reaction at standard conditions

Δ_rH° Enthalpy of reaction at standard conditions
Data from NIST Standard Reference Database 69: NIST Chemistry WebBook
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Δ_rG°	Free energy of reaction at standard conditions
Δ_rH°	Enthalpy of reaction at standard conditions