Tetrafluoromethane

• Formula: CF₄
• Molecular weight: 88.0043
• IUPAC Standard InChI:
  

  InChI=1S/CF4/c2-1(3,4)5 Download the identifier in a file.

• IUPAC Standard InChIKey: TXEYQDLBPFQVAA-UHFFFAOYSA-N
• CAS Registry Number: 75-73-0
• 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: Carbon tetrafluoride; Methane, tetrafluoro-; Arcton 0; Carbon fluoride (CF4); Freon 14; FC 14; Perfluoromethane; CF4; Halon 14; Carbon fluoride; F 14; Halocarbon 14; R 14; UN 1982; Refrigerant 14; CFC 14; R 14 (Refrigerant); Refrigerant R 14; Methane, tetrafluo-
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• Information on this page:
  • Gas phase thermochemistry data
  • Condensed phase thermochemistry data
  • Reaction thermochemistry data
  • References
  • Notes
• Other data available:
  • Phase change data
  • Henry's Law data
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  • Ion clustering data
  • IR Spectrum
  • Mass spectrum (electron ionization)
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  • Gas Chromatography
  • Fluid Properties
• Data at other public NIST sites:
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Gas 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 as indicated in comments:
ALS - Hussein Y. Afeefy, Joel F. Liebman, and Stephen E. Stein

Quantity	Value	Units	Method	Reference	Comment
fH°gas	-930. ± 20.	kJ/mol	AVG	N/A	Average of 12 out of 13 values; Individual data points
Quantity	Value	Units	Method	Reference	Comment
S°gas,1 bar	261.41	J/mol*K	Review	Chase, 1998	Data last reviewed in June, 1969

Gas Phase Heat Capacity (Shomate Equation)

C_p° = A + B*t + C*t² + D*t³ + E/t²
H° − H°_298.15= A*t + B*t²/2 + C*t³/3 + D*t⁴/4 − E/t + F − H
S° = A*ln(t) + B*t + C*t²/2 + D*t³/3 − E/(2*t²) + G
    C_p = heat capacity (J/mol*K)
    H° = standard enthalpy (kJ/mol)
    S° = standard entropy (J/mol*K)
    t = temperature (K) / 1000.

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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 as indicated in comments:
ALS - Hussein Y. Afeefy, Joel F. Liebman, and Stephen E. Stein
DH - Eugene S. Domalski and Elizabeth D. Hearing

Quantity	Value	Units	Method	Reference	Comment
cH°liquid	-1519.89	kJ/mol	Ccb	Price and Sapiano, 1979	ALS
cH°liquid	-2222.3	kJ/mol	Ccb	Krech, Price, et al., 1973	ALS
Quantity	Value	Units	Method	Reference	Comment
S°liquid	143.97	J/mol*K	N/A	Smith and Pace, 1969	DH

Constant pressure heat capacity of liquid

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:
M - Michael M. Meot-Ner (Mautner) and Sharon G. Lias
ALS - Hussein Y. Afeefy, Joel F. Liebman, and Stephen E. Stein
MS - José A. Martinho Simões

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

(  4) +  = (  5)

By formula: (F^-  4CF₄) + CF₄ = (F^-  5CF₄)

Quantity	Value	Units	Method	Reference	Comment
rH°	10.	kJ/mol	PHPMS	Hiraoka, Nasu, et al., 1995	gas phase; Entropy change calculated or estimated; M
Quantity	Value	Units	Method	Reference	Comment
rS°	79.	J/mol*K	N/A	Hiraoka, Nasu, et al., 1995	gas phase; Entropy change calculated or estimated; M

(CF₃^-  3) +  = (CF₃^-  4)

By formula: (CF₃^-  3CF₄) + CF₄ = (CF₃^-  4CF₄)

Quantity	Value	Units	Method	Reference	Comment
rH°	14.	kJ/mol	PHPMS	Hiraoka, Nasu, et al., 1995	gas phase; Entropy change calculated or estimated; M
Quantity	Value	Units	Method	Reference	Comment
rS°	110.	J/mol*K	N/A	Hiraoka, Nasu, et al., 1995	gas phase; Entropy change calculated or estimated; M

 + 2 =  + 4

By formula: CF₄ + 2H₂O = CO₂ + 4HF

Quantity	Value	Units	Method	Reference	Comment
rH°	-174. ± 4.2	kJ/mol	Cm	Good, Scott, et al., 1956	gas phase; HF has 10 moles H2O, see Scott, Good, et al., 1955; ALS
rH°	-174. ± 4.2	kJ/mol	Cm	Scott, Good, et al., 1955	gas phase; Heat of hydrolysis; ALS

(  2) +  = (  3)

By formula: (CF₃⁺  2CF₄) + CF₄ = (CF₃⁺  3CF₄)

Quantity	Value	Units	Method	Reference	Comment
rH°	12.	kJ/mol	PHPMS	Hiraoka, Nasu, et al., 1996	gas phase; M
Quantity	Value	Units	Method	Reference	Comment
rS°	88.	J/mol*K	PHPMS	Hiraoka, Nasu, et al., 1996	gas phase; M

(  3) +  = (  4)

By formula: (CF₃⁺  3CF₄) + CF₄ = (CF₃⁺  4CF₄)

Quantity	Value	Units	Method	Reference	Comment
rH°	12.	kJ/mol	PHPMS	Hiraoka, Nasu, et al., 1996	gas phase; M
Quantity	Value	Units	Method	Reference	Comment
rS°	84.	J/mol*K	PHPMS	Hiraoka, Nasu, et al., 1996	gas phase; M

(  ) +  = (  2)

By formula: (CF₃⁺  CF₄) + CF₄ = (CF₃⁺  2CF₄)

Quantity	Value	Units	Method	Reference	Comment
rH°	21.	kJ/mol	PHPMS	Hiraoka, Nasu, et al., 1996	gas phase; M
Quantity	Value	Units	Method	Reference	Comment
rS°	92.	J/mol*K	PHPMS	Hiraoka, Nasu, et al., 1996	gas phase; M

(CHF₄⁺  2) +  = (CHF₄⁺  3)

By formula: (CHF₄⁺  2CF₄) + CF₄ = (CHF₄⁺  3CF₄)

Quantity	Value	Units	Method	Reference	Comment
rH°	9.6	kJ/mol	PHPMS	Hiraoka, Nasu, et al., 1996	gas phase; M
Quantity	Value	Units	Method	Reference	Comment
rS°	67.	J/mol*K	PHPMS	Hiraoka, Nasu, et al., 1996	gas phase; M

(CHF₄⁺  ) +  = (CHF₄⁺  2)

By formula: (CHF₄⁺  CF₄) + CF₄ = (CHF₄⁺  2CF₄)

Quantity	Value	Units	Method	Reference	Comment
rH°	12.	kJ/mol	PHPMS	Hiraoka, Nasu, et al., 1996	gas phase; M
Quantity	Value	Units	Method	Reference	Comment
rS°	46.	J/mol*K	PHPMS	Hiraoka, Nasu, et al., 1996	gas phase; M

(  2) +  = (  3)

By formula: (F^-  2CF₄) + CF₄ = (F^-  3CF₄)

Quantity	Value	Units	Method	Reference	Comment
rH°	17.	kJ/mol	PHPMS	Hiraoka, Nasu, et al., 1995	gas phase; M
Quantity	Value	Units	Method	Reference	Comment
rS°	71.	J/mol*K	PHPMS	Hiraoka, Nasu, et al., 1995	gas phase; M

(  3) +  = (  4)

By formula: (F^-  3CF₄) + CF₄ = (F^-  4CF₄)

Quantity	Value	Units	Method	Reference	Comment
rH°	16.	kJ/mol	PHPMS	Hiraoka, Nasu, et al., 1995	gas phase; M
Quantity	Value	Units	Method	Reference	Comment
rS°	79.	J/mol*K	PHPMS	Hiraoka, Nasu, et al., 1995	gas phase; M

(CF₃^-  2) +  = (CF₃^-  3)

By formula: (CF₃^-  2CF₄) + CF₄ = (CF₃^-  3CF₄)

Quantity	Value	Units	Method	Reference	Comment
rH°	14.	kJ/mol	PHPMS	Hiraoka, Nasu, et al., 1995	gas phase; M
Quantity	Value	Units	Method	Reference	Comment
rS°	110.	J/mol*K	PHPMS	Hiraoka, Nasu, et al., 1995	gas phase; M

(  ) +  = (  2)

By formula: (F^-  CF₄) + CF₄ = (F^-  2CF₄)

Quantity	Value	Units	Method	Reference	Comment
rH°	25.	kJ/mol	PHPMS	Hiraoka, Nasu, et al., 1995	gas phase; M
Quantity	Value	Units	Method	Reference	Comment
rS°	92.	J/mol*K	PHPMS	Hiraoka, Nasu, et al., 1995	gas phase; M

(CF₃^-  ) +  = (CF₃^-  2)

By formula: (CF₃^-  CF₄) + CF₄ = (CF₃^-  2CF₄)

Quantity	Value	Units	Method	Reference	Comment
rH°	14.	kJ/mol	PHPMS	Hiraoka, Nasu, et al., 1995	gas phase; M
Quantity	Value	Units	Method	Reference	Comment
rS°	100.	J/mol*K	PHPMS	Hiraoka, Nasu, et al., 1995	gas phase; M

C₄H₉⁺ +  = (C₄H₉⁺  )

By formula: C₄H₉⁺ + CF₄ = (C₄H₉⁺  CF₄)

Quantity	Value	Units	Method	Reference	Comment
rH°	14.	kJ/mol	PHPMS	Sharma, Meza de Hojer, et al., 1985	gas phase; M
Quantity	Value	Units	Method	Reference	Comment
rS°	43.5	J/mol*K	PHPMS	Sharma, Meza de Hojer, et al., 1985	gas phase; M

 +  = (  )

By formula: CF₃⁺ + CF₄ = (CF₃⁺  CF₄)

Quantity	Value	Units	Method	Reference	Comment
rH°	28.	kJ/mol	PHPMS	Hiraoka, Nasu, et al., 1996	gas phase; M
Quantity	Value	Units	Method	Reference	Comment
rS°	79.	J/mol*K	PHPMS	Hiraoka, Nasu, et al., 1996	gas phase; M

CHF₄⁺ +  = (CHF₄⁺  )

By formula: CHF₄⁺ + CF₄ = (CHF₄⁺  CF₄)

Quantity	Value	Units	Method	Reference	Comment
rH°	21.	kJ/mol	PHPMS	Hiraoka, Nasu, et al., 1996	gas phase; M
Quantity	Value	Units	Method	Reference	Comment
rS°	84.	J/mol*K	PHPMS	Hiraoka, Nasu, et al., 1996	gas phase; M

 +  = (  )

By formula: F^- + CF₄ = (F^-  CF₄)

Quantity	Value	Units	Method	Reference	Comment
rH°	27.	kJ/mol	PHPMS	Hiraoka, Nasu, et al., 1995	gas phase; M
Quantity	Value	Units	Method	Reference	Comment
rS°	92.	J/mol*K	PHPMS	Hiraoka, Nasu, et al., 1995	gas phase; M

CF₃^- +  = (CF₃^-  )

By formula: CF₃^- + CF₄ = (CF₃^-  CF₄)

Quantity	Value	Units	Method	Reference	Comment
rH°	15.	kJ/mol	PHPMS	Hiraoka, Nasu, et al., 1995	gas phase; M
Quantity	Value	Units	Method	Reference	Comment
rS°	92.	J/mol*K	PHPMS	Hiraoka, Nasu, et al., 1995	gas phase; M

2 =  + 

By formula: 2CF₂O = CO₂ + CF₄

Quantity	Value	Units	Method	Reference	Comment
rH°	-45.6 ± 9.2	kJ/mol	Eqk	Amphlett, Dacey, et al., 1971	gas phase; Heat of Decomposition third law at 1200 K; ALS

2 = 4 + 5 + 3

By formula: 2C₂F₁₁N₅ = 4CF₄ + 5N₂ + 3F₂

Quantity	Value	Units	Method	Reference	Comment
rH°	-3009. ± 13.	kJ/mol	Cm	Sinke, Thompson, et al., 1967	gas phase; Energy of explosion; ALS

CF₅N =  + 0.5 + 0.5

By formula: CF₅N = CF₄ + 0.5N₂ + 0.5F₂

Quantity	Value	Units	Method	Reference	Comment
rH°	-226. ± 2.	kJ/mol	Ccb	Walker, 1972	gas phase; Decompostion reaction; ALS

 + 0.5 + 0.5 = CF₅N

By formula: CF₄ + 0.5N₂ + 0.5F₂ = CF₅N

Quantity	Value	Units	Method	Reference	Comment
rH°	226. ± 2.	kJ/mol	Ccb	Walker, 1972	gas phase; Decompostion reaction; ALS

2 = 2 + 3 + 3

By formula: 2CF₇N₃ = 2CF₄ + 3N₂ + 3F₂

Quantity	Value	Units	Method	Reference	Comment
rH°	-1467.	kJ/mol	Cm	Sinke, Thompson, et al., 1967	gas phase; Energy of explosion; ALS

2 = 2 + 3 + 

By formula: 2CF₅N₃ = 2CF₄ + 3N₂ + F₂

Quantity	Value	Units	Method	Reference	Comment
rH°	-2059.	kJ/mol	Cm	Sinke, Thompson, et al., 1967	gas phase; Energy of explosion; ALS

=  + 2 + 2

By formula: CF₈N₄ = CF₄ + 2N₂ + 2F₂

Quantity	Value	Units	Method	Reference	Comment
rH°	-935.1	kJ/mol	Cm	Sinke, Thompson, et al., 1967	gas phase; Energy of explosion; ALS

=  +  + 

By formula: CF₆N₂ = CF₄ + N₂ + F₂

Quantity	Value	Units	Method	Reference	Comment
rH°	-478.2	kJ/mol	Cm	Sinke, Thompson, et al., 1967	gas phase; Energy of explosion; ALS

C₅O₅W (g) +  (g) = C₆F₄O₅W (g)

By formula: C₅O₅W (g) + CF₄ (g) = C₆F₄O₅W (g)

Quantity	Value	Units	Method	Reference	Comment
rH°	<-20.9	kJ/mol	EqG	Brown, Ishikawa, et al., 1990	Temperature range: ca. 300-350 K; MS

3 + 5 = 6 + 4

By formula: 3C₂F₃N + 5F₃N = 6CF₄ + 4N₂

Quantity	Value	Units	Method	Reference	Comment
rH°	-3449.3 ± 0.92	kJ/mol	Eqk	Walker, Sinke, et al., 1970	gas phase; ALS

4 +  =  + 4

By formula: 4Na + CF₄ = C + 4FNa

Quantity	Value	Units	Method	Reference	Comment
rH°	-1362. ± 9.2	kJ/mol	Ccb	Vorob'ev and Skuratov, 1960	gas phase; ALS

 + 4 =  + 4

By formula: CF₄ + 4HF = CH₄ + 4F₂

Quantity	Value	Units	Method	Reference	Comment
rH°	-1922. ± 13.	kJ/mol	Cm	Jessup, McCoskey, et al., 1955	gas phase; ALS

3 + 2 = 6 + 

By formula: 3C₂F₆ + 2F₃N = 6CF₄ + N₂

Quantity	Value	Units	Method	Reference	Comment
rH°	-1304. ± 13.	kJ/mol	Ccb	Sinke, 1966	gas phase; ALS

(CHF₄⁺  3) +  = (CHF₄⁺  4)

By formula: (CHF₄⁺  3CF₄) + CF₄ = (CHF₄⁺  4CF₄)

Quantity	Value	Units	Method	Reference	Comment
rH°	9.6	kJ/mol	PHPMS	Hiraoka, Nasu, et al., 1996	gas phase; M

 + 2 = 2

By formula: C₂F₄ + 2F₂ = 2CF₄

Quantity	Value	Units	Method	Reference	Comment
rH°	-1037.3	kJ/mol	Ccb	Domalski and Armstrong, 1967	solid 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.

Chase, 1998
Chase, M.W., Jr., NIST-JANAF Themochemical Tables, Fourth Edition, J. Phys. Chem. Ref. Data, Monograph 9, 1998, 1-1951. [all data]

Price and Sapiano, 1979
Price, S.J.W.; Sapiano, H.J., Determination of «DELTA»H°_f298(C₆F₁₀,g) and «DELTA»H°_f298(C₆F₁₂,g) from studies of the combustion of decafluorocyclohexene and dodecafluorocylohexene in oxygen and calculation of the resonance energy of hexafluorobenzene, Can. J. Chem., 1979, 58, 685-688. [all data]

Krech, Price, et al., 1973
Krech, M.J.; Price, S.J.W.; Yared, W.F., Determination of the heat of formation of octafluorotoluene and calculation of D[C₆F₅-F] - D[C₆F₅-CF₃], Can. J. Chem., 1973, 51, 3662-3664. [all data]

Smith and Pace, 1969
Smith, J.H.; Pace, E.L., The thermodynamic properties of carbon tetrafluoride from 12°K to its boiling point. The significance of the parameter {nu}, J. Phys. Chem., 1969, 73, 4232-4236. [all data]

Hiraoka, Nasu, et al., 1995
Hiraoka, K.; Nasu, M.; Fujimaki, S.; Ignacio, E.W.; Yamabe, S., Weak Ion-Molecule Complexes of F-(CF4)n and CF3-(CF4)n, Chem Phys. Let., 1995, 245, 1, 14, https://doi.org/10.1016/0009-2614(95)00980-I . [all data]

Good, Scott, et al., 1956
Good, W.D.; Scott, D.W.; Waddington, G., Combustion calorimetry of organic fluorine compounds by a rotating-bomb method, J. Phys. Chem., 1956, 60, 1080-1089. [all data]

Scott, Good, et al., 1955
Scott, D.W.; Good, W.D.; Waddington, G., Heat of formation of tetrafluoromethane from combustion calorimetry of polytetrafluoroethylene, J. Am. Chem. Soc., 1955, 77, 245-246. [all data]

Hiraoka, Nasu, et al., 1996
Hiraoka, K.; Nasu, M.; Fujimaki, S.; Ignacio, E.W.; Yamabe, S., Gas-Phase Stability and Structure of the Cluster Ions CF3+(CO)n, CF3+(N2)n, CF3+((CF4)n, and CF4H+(CF4)n, J. Phys. Chem., 1996, 100, 13, 5245, https://doi.org/10.1021/jp9530010 . [all data]

Sharma, Meza de Hojer, et al., 1985
Sharma, D.M.S.; Meza de Hojer, S.; Kebarle, P., Stabilities of halonium ions from a study of gas-phase equilibria R+ + XR' = (RXR')+, J. Am. Chem. Soc., 1985, 107, 13, 3757, https://doi.org/10.1021/ja00299a002 . [all data]

Amphlett, Dacey, et al., 1971
Amphlett, J.C.; Dacey, J.R.; Pritchard, G.O., An investigation of the reaction 2COF₂ = CO₂ + CF₄ and the heat of formation of carbonyl fluoride, J. Phys. Chem., 1971, 75, 3024-3026. [all data]

Sinke, Thompson, et al., 1967
Sinke, G.C.; Thompson, C.J.; Jostad, R.E.; Walker, L.C.; Swanson, A.C.; Stull, D.R., Enthalpies of formation and bond energies of some fluoramines, J. Chem. Phys., 1967, 47, 1852-1854. [all data]

Walker, 1972
Walker, L.C., The enthalpy of decomposition of CF₃NF₂(g) to CF₄(g), N₂(g), and F₂(g), J. Chem. Thermodyn., 1972, 4, 219-223. [all data]

Brown, Ishikawa, et al., 1990
Brown, C.E.; Ishikawa, Y.; Hackett, P.A.; Rayner, D.M., J. Am. Chem. Soc., 1990, 112, 2530. [all data]

Walker, Sinke, et al., 1970
Walker, L.C.; Sinke, G.C.; Perettie, D.J.; Janz, G.J., Enthalpy of formation of trifluoroacetonitrile, J. Am. Chem. Soc., 1970, 92, 4525-4526. [all data]

Vorob'ev and Skuratov, 1960
Vorob'ev, A.F.; Skuratov, S.M., Standard enthalpies of formation of CF₄, Zh. Neorg. Khim., 1960, 5, 1398-1401. [all data]

Jessup, McCoskey, et al., 1955
Jessup, R.S.; McCoskey, R.E.; Nelson, R.A., The heat of formation of tetrafluoromethane, J. Am. Chem. Soc., 1955, 77, 244-245. [all data]

Sinke, 1966
Sinke, G.C., The heat of reaction of nitrogen trifluoride and hexafluoroethane, J. Phys. Chem., 1966, 70, 1326-1327. [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, 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
  S°gas,1 bar	Entropy of gas at standard conditions (1 bar)
  S°liquid	Entropy of liquid at standard conditions
  cH°liquid	Enthalpy of combustion of liquid at standard conditions
  fH°gas	Enthalpy of formation of gas at standard conditions
  rH°	Enthalpy of reaction at standard conditions
  rS°	Entropy of reaction at standard conditions

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