Methane, trifluoroiodo-

• Formula: CF₃I
• Molecular weight: 195.9104
• IUPAC Standard InChI: InChI=1S/CF3I/c2-1(3,4)5 Copy

  
• IUPAC Standard InChIKey: VPAYJEUHKVESSD-UHFFFAOYSA-N Copy
• CAS Registry Number: 2314-97-8
• 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: Iodotrifluoromethane; Perfluoromethyl iodide; Trifluoroiodomethane; Trifluoromethyl iodide; CF3I; Trifluoriodomethane; CIF3
• Permanent link for this species. Use this link for bookmarking this species for future reference.
• Information on this page:
  • Gas phase thermochemistry data
  • Reaction thermochemistry data
  • Gas phase ion energetics data
  • Ion clustering data
  • References
  • Notes
• Other data available:
  • Phase change data
  • Mass spectrum (electron ionization)
  • Vibrational and/or electronic energy levels
• Data at other public NIST sites:
  • Gas Phase Kinetics Database
• Options:
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• NIST / TRC Web Thermo Tables, professional edition (thermophysical and thermochemical data)

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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

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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Reaction 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:
M - Michael M. Meot-Ner (Mautner) and Sharon G. Lias
ALS - Hussein Y. Afeefy, Joel F. Liebman, and Stephen E. Stein
B - 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: CH₃⁺ + CF₃I = (CH₃⁺ • CF₃I)

 +  =  + 

By formula: I₂ + CClF₃ = CF₃I + ClI

 +  =  + 

By formula: I₂ + CBrF₃ = CF₃I + BrI

 +  = CClF₃I^-

By formula: Cl^- + CF₃I = CClF₃I^-

Gas phase ion energetics data

Go To: Top, Gas phase thermochemistry data, Reaction thermochemistry data, Ion clustering 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
LL - Sharon G. Lias and Joel F. Liebman
B - John E. Bartmess

Electron affinity determinations

Ionization energy determinations

Appearance energy determinations

Ion clustering data

Go To: Top, Gas phase thermochemistry data, Reaction thermochemistry data, 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 as indicated in comments:
M - Michael M. Meot-Ner (Mautner) and Sharon G. Lias
B - John E. Bartmess

Note: Please consider using the reaction search for this species. This page allows searching of all reactions involving this species. Searches may be limited to ion clustering reactions. A general reaction search form is also available.

Clustering reactions

 +  = ( • )

By formula: CH₃⁺ + CF₃I = (CH₃⁺ • CF₃I)

 +  = CClF₃I^-

By formula: Cl^- + CF₃I = CClF₃I^-

References

Go To: Top, Gas phase thermochemistry data, Reaction thermochemistry data, Gas phase ion energetics data, Ion clustering 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]

Goy, Lord, et al., 1967
Goy, C.A.; Lord, A.; Pritchard, H.O., Kinetics and thermodynamics of the reaction between iodine and fluoroform and the heat of formation of trifluoromethyl iodide, J. Phys. Chem., 1967, 71, 1086-1089. [all data]

Cox and Pilcher, 1970
Cox, J.D.; Pilcher, G., Thermochemistry of Organic and Organometallic Compounds, Academic Press, New York, 1970, 1-636. [all data]

McMahon, Heinis, et al., 1988
McMahon, T.; Heinis, T.; Nicol, G.; Hovey, J.K.; Kebarle, P., Methyl Cation Affinities, J. Am. Chem. Soc., 1988, 110, 23, 7591, https://doi.org/10.1021/ja00231a002 . [all data]

Foster, Williamson, et al., 1974
Foster, M.S.; Williamson, A.D.; Beauchamp, J.L., Photoionization mass spectrometry of trans-azomethane, Int. J. Mass Spectrom. Ion Phys., 1974, 15, 429. [all data]

Lord, Goy, et al., 1967
Lord, A.; Goy, C.A.; Pritchard, H.O., The heats of formation of trifluoromethyl chloride and bromide, J. Phys. Chem., 1967, 71, 2705-2707. [all data]

Bogdanov and McMahon, 2006
Bogdanov, B.; McMahon, T.B., Gas phase S(N)2 reactions of halide ions with trifluoromethyl halides: Front- and back-side attack vs. complex formation, J. Phys. Chem. A, 2006, 110, 4, 1350-1363, https://doi.org/10.1021/jp0541011 . [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]

Compton, Reinhardt, et al., 1978
Compton, R.N.; Reinhardt, P.W.; Cooper, C.D., Collisional ionization between alkali atoms and some methane derivatives: Electron affinities for CH₃NO₂, CF₃I, and CF₃Br, J. Chem. Phys., 1978, 68, 4360. [all data]

Tang, Mathur, et al., 1976
Tang, S.Y.; Mathur, B.P.; Roth, E.W.; Reck, G.P., Negative ion formation in halocarbons by charge exchange with cesium, J. Chem. Phys., 1976, 64, 1270. [all data]

McNamee, Lacmann, et al., 1973
McNamee, P.E.; Lacmann, K.; Herschbach, D.R., Translational Energy Dependence of Product Energy and Angular Distribution for the K + CH3I Reaction. Comments., Faraday Disc. Chem. Soc., 1973, 55, 318. [all data]

Bancroft, Yates, et al., 1984
Bancroft, G.M.; Yates, B.W.; Tan, K.H.; Coatsworth, L.L., High resolution gas phase photoelectron spectra using synchrotron radiation. selective enhancement of the I 5p cross section in CF₃I due to photoexcitation of I 4d electrons, J. Chem. Soc., Chem. Commun., 1984, 1613. [all data]

Wang and Leroi, 1983
Wang, F.C.-Y.; Leroi, G.E., Photoionization and fragmentation of halogenated methanes, Ann. Isr. Phys. Soc., 1983, 6, 210. [all data]

Berman, Beauchamp, et al., 1981
Berman, D.W.; Beauchamp, J.L.; Thorne, L.R., Ion cyclotron resonance and photoionization investigations of the thermochemistry and reactions of ions derived from CF₃I, Int. J. Mass Spectrom. Ion Phys., 1981, 39, 47. [all data]

Noutary, 1968
Noutary, C.J., Mass spectrometric study of some fluorocarbons and trifluoromethyl halides, J.Res. NBS, 1968, 72A, 479. [all data]

Dorman, 1964
Dorman, F.H., Appearance potentials of the fragment ions from CF₃I, J. Chem. Phys., 1964, 41, 2857. [all data]

Marriott and Craggs, 1956
Marriott, J.; Craggs, J.D., Ionization and dissociation by electron impact. I. Trifluoromethyl halides, J. Electron., 1956, 1, 405. [all data]

Dibeler, Reese, et al., 1956
Dibeler, V.H.; Reese, R.M.; Mohler, F.L., Ionization and dissociation of the trifluoromethyl halides by electron impact, J. Res. NBS, 1956, 57, 113. [all data]

Cvitas, Gusten, et al., 1977
Cvitas, J.; Gusten, H.; Klasinc, L.; Novadj, I.; Vancik, H., Photoelectron spectra of bromo- iodotrifluoromethane, Z. Naturforsch. A:, 1977, 32, 1528. [all data]

Powis, Dutuit, et al., 1990
Powis, I.; Dutuit, O.; Richard-Viard, M.; Guyon, P.M., Photoion anisotropy in dissociative photoionization of CF₃I, J. Chem. Phys., 1990, 92, 1643. [all data]

Bombach, Dannacher, et al., 1982
Bombach, R.; Dannacher, J.; Stadelmann, J.-P.; Vogt, J.; Thorne, L.R.; Beauchamp, J.L., Photoelectron-photoion coincidence study of CF₃I. Implications for the CW IR laser multiphoton dissociation of CF₃I⁺, Chem. Phys., 1982, 66, 403. [all data]

Notes

Go To: Top, Gas phase thermochemistry data, Reaction thermochemistry data, Gas phase ion energetics data, Ion clustering data, References

• Symbols used in this document:
  

  AE	Appearance energy
  EA	Electron affinity
  IE (evaluated)	Recommended ionization energy
  S°gas,1 bar	Entropy of gas at standard conditions (1 bar)
  ΔcH°gas	Enthalpy of combustion of gas at standard conditions
  ΔfH°gas	Enthalpy of formation of gas at standard conditions
  ΔrH°	Enthalpy of reaction at standard conditions

• Data from NIST Standard Reference Database 69: NIST Chemistry WebBook
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