Difluorochloromethane

Data at NIST subscription sites:

NIST subscription sites provide data under the NIST Standard Reference Data Program, but require an annual fee to access. The purpose of the fee is to recover costs associated with the development of data collections included in such sites. Your institution may already be a subscriber. Follow the links above to find out more about the data in these sites and their terms of usage.


Gas phase ion energetics data

Go To: Top, 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:
L - Sharon G. Lias

Data compiled as indicated in comments:
B - John E. Bartmess
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

Quantity Value Units Method Reference Comment
IE (evaluated)12.28 ± 0.02eVN/AN/AL

Ionization energy determinations

IE (eV) Method Reference Comment
12.28 ± 0.02PIWang and Leroi, 1983LBLHLM
12.1PENovak, Cvitas, et al., 1981LLK
12.45 ± 0.05PIWatanabe, Nakayama, et al., 1962RDSH
12.56PENovak, Cvitas, et al., 1981Vertical value; LLK
12.6PEDoucet, Sauvageau, et al., 1973Vertical value; LLK

Appearance energy determinations

Ion AE (eV) Other Products MethodReferenceComment
CFCl+15.9 ± 0.3?EIHobrock and Kiser, 1964RDSH
CF+17. ± 0.?EIHobrock and Kiser, 1964RDSH
CF2+16.1 ± 0.3?EIHobrock and Kiser, 1964RDSH
CHFCl+15.11 ± 0.15FEIHobrock and Kiser, 1964RDSH
CHF2+12.59 ± 0.15ClEIHobrock and Kiser, 1964RDSH
Cl+20.5 ± 0.3?EIHobrock and Kiser, 1964RDSH

De-protonation reactions

CClF2- + Hydrogen cation = Difluorochloromethane

By formula: CClF2- + H+ = CHClF2

Quantity Value Units Method Reference Comment
Δr>374.71kcal/molAcidPaulino and Squires, 1991gas phase; Probably CF2..Cl-, non-covalent.; B
Δr378.3 ± 7.0kcal/molD-EADispert and Lacmann, 1978gas phase; From CF2Cl2; B
Quantity Value Units Method Reference Comment
Δr>366.96 ± 0.89kcal/molH-TSPaulino and Squires, 1991gas phase; Probably CF2..Cl-, non-covalent.; B
Δr370.5 ± 7.1kcal/molH-TSDispert and Lacmann, 1978gas phase; From CF2Cl2; B

References

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.

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]

Novak, Cvitas, et al., 1981
Novak, I.; Cvitas, T.; Klasinc, L.; Gusten, H., Photoelectron spectra of some halogenomethanes, J. Chem. Soc. Faraday Trans. 2, 1981, 77, 2049. [all data]

Watanabe, Nakayama, et al., 1962
Watanabe, K.; Nakayama, T.; Mottl, J., Ionization potentials of some molecules, J. Quant. Spectry. Radiative Transfer, 1962, 2, 369. [all data]

Doucet, Sauvageau, et al., 1973
Doucet, J.; Sauvageau, P.; Sandorfy, C., Vacuum ultraviolet and photoelectron spectra of fluoro-chloro derivatives of methane, J. Chem. Phys., 1973, 58, 3708. [all data]

Hobrock and Kiser, 1964
Hobrock, D.L.; Kiser, R.W., Electron impact studies of some trihalomethanes: trichloromethane, dichlorofluoro-methane, chlorodifluoromethane, and trifluoromethane, J. Phys. Chem., 1964, 68, 575. [all data]

Paulino and Squires, 1991
Paulino, J.A.; Squires, R.R., Carbene Anion Complexes - Unusual Structural and Thermochemical Features of alpha-Halocarbanions in the Gas Phase, J. Am. Chem. Soc., 1991, 113, 5, 1845, https://doi.org/10.1021/ja00005a067 . [all data]

Dispert and Lacmann, 1978
Dispert, H.; Lacmann, K., Negative ion formation in collisions between potassium and fluoro- and chloromethanes: Electron affinities and bond dissociation energies, Int. J. Mass Spectrom. Ion Phys., 1978, 28, 49. [all data]


Notes

Go To: Top, Gas phase ion energetics data, References