Methane, trifluoroiodo-

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Gas phase ion energetics 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 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

Quantity Value Units Method Reference Comment
IE (evaluated)10.28 ± 0.07eVN/AN/AL
Quantity Value Units Method Reference Comment
Proton affinity (review)628.0kJ/molN/AHunter and Lias, 1998HL
Quantity Value Units Method Reference Comment
Gas basicity598.2kJ/molN/AHunter and Lias, 1998HL

Electron affinity determinations

EA (eV) Method Reference Comment
1.57 ± 0.20NBIECompton, Reinhardt, et al., 1978B
1.40 ± 0.20NBIETang, Mathur, et al., 1976B
2.20 ± 0.20NBIEMcNamee, Lacmann, et al., 1973B

Ionization energy determinations

IE (eV) Method Reference Comment
10.2PEBancroft, Yates, et al., 1984LBLHLM
10.38 ± 0.02PIWang and Leroi, 1983LBLHLM
10.32 ± 0.03PIBerman, Beauchamp, et al., 1981LLK
10.23PINoutary, 1968RDSH
10.5 ± 0.1EIDorman, 1964RDSH
10.64 ± 0.02EIMarriott and Craggs, 1956RDSH
10.0 ± 0.3EIDibeler, Reese, et al., 1956RDSH
10.5PEBancroft, Yates, et al., 1984Vertical value; LBLHLM
10.45 ± 0.05PECvitas, Gusten, et al., 1977Vertical value; LLK

Appearance energy determinations

Ion AE (eV) Other Products MethodReferenceComment
C+33. ± 1.?EIDibeler, Reese, et al., 1956RDSH
CF+19.9 ± 0.3?EIMarriott and Craggs, 1956RDSH
CF2I+13.40 ± 0.05FPIPECOPowis, Dutuit, et al., 1990LL
CF2I+14.58 ± 0.06FEIMarriott and Craggs, 1956RDSH
CF2I+15.3 ± 0.3FEIDibeler, Reese, et al., 1956RDSH
CF3+11.26 ± 0.05IPIPECOBombach, Dannacher, et al., 1982LBLHLM
CF3+11.36 ± 0.03IPIBerman, Beauchamp, et al., 1981T = 0K; LLK
CF3+11.27 ± 0.03IPIBerman, Beauchamp, et al., 1981T = 298K; LLK
CF3+10.89 ± 0.01IPINoutary, 1968RDSH
F+33. ± 1.?EIDibeler, Reese, et al., 1956RDSH
I+13.4 ± 0.1?EIDorman, 1964RDSH


Go To: Top, 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.

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, . [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]


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