Chlorodifluoromethyl radical
- Formula: CClF2
- Molecular weight: 85.461
- IUPAC Standard InChIKey: QPAXMPYBNSHKAK-UHFFFAOYSA-N
- CAS Registry Number: 1691-89-0
- Chemical structure:
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Gas phase ion energetics data
Go To: Top, Vibrational and/or electronic energy levels, 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:
LL - Sharon G. Lias and Joel F. Liebman
B - John E. Bartmess
View reactions leading to CClF2+ (ion structure unspecified)
Quantity | Value | Units | Method | Reference | Comment |
---|---|---|---|---|---|
ΔfH°(+) ion | 556. | kJ/mol | N/A | N/A |
Electron affinity determinations
EA (eV) | Method | Reference | Comment |
---|---|---|---|
>1.86999 | EIAE | Illenberger, Baumgartel, et al., 1979 | From CF3Cl. G3MP2B3 calculations indicate an EA of ca. 2.05 eV.; B |
<1.75581 | D-EA | Paulino and Squires, 1991 | Probably CF2..Cl-, non-covalent.; B |
1.60 ± 0.30 | NBAE | Dispert and Lacmann, 1978 | From CF2Cl2; B |
Ionization energy determinations
IE (eV) | Method | Reference | Comment |
---|---|---|---|
13. ± 1. | DER | Langford and Harris, 1990 | LL |
9.0 ± 0.5 | CIEL | Griffiths, Harris, et al., 1989 | LL |
Vibrational and/or electronic energy levels
Go To: Top, 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 by: Marilyn E. Jacox
State: 3p Ryd
Energy (cm-1) |
Med. | Transition | λmin (nm) |
λmax (nm) |
References | ||
---|---|---|---|---|---|---|---|
To = 49220 | U | gas | 3p-X | Tsai, Johnson, et al., 1989 | |||
Vib. sym. |
No. | Approximate type of mode |
cm-1 | Med. | Method | References | |
---|---|---|---|---|---|---|---|
b1 | 4 | OPLA | 745 ± 25 | gas | MPI | Tsai, Johnson, et al., 1989 | |
State: X
Vib. sym. |
No. | Approximate type of mode |
cm-1 | Med. | Method | References | |
---|---|---|---|---|---|---|---|
a' | 1 | CF stretch | 1148 | vs | Ar | IR | Milligan, Jacox, et al., 1973 Prochaska and Andrews, 1978 |
2 | CCl stretch | 761 | s | Ar | IR | Milligan, Jacox, et al., 1973 Prochaska and Andrews, 1978 | |
3 | CF2 scissor | 599 | m | Ar | IR | Milligan, Jacox, et al., 1973 Prochaska and Andrews, 1978 | |
a | 5 | CF stretch | 1208 | vs | Ar | IR | Milligan, Jacox, et al., 1973 Prochaska and Andrews, 1978 |
Additional references: Jacox, 1994, page 216
Notes
m | Medium |
s | Strong |
vs | Very strong |
U | Upper bound |
o | Energy separation between the v = 0 levels of the excited and electronic ground states. |
References
Go To: Top, Gas phase ion energetics data, Vibrational and/or electronic energy levels, Notes
Data compilation copyright by the U.S. Secretary of Commerce on behalf of the U.S.A. All rights reserved.
Illenberger, Baumgartel, et al., 1979
Illenberger, T.; Baumgartel, H.; Scheunemann, H.,
Negative Ion Formation in CF2Cl2, CF3Cl, and CFCl3 Following Low Energy (0-10eV) Impact with Near Monoenergetic Electrons,
Chem. Phys., 1979, 37, 1, 21, https://doi.org/10.1016/0301-0104(79)80003-8
. [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]
Langford and Harris, 1990
Langford, M.L.; Harris, F.M.,
Experimental determination of the energies required to ionize the ions CFCl+, CFBr+, CClBr+, CF2Cl+, CF2Br+, CCl2F+, CBr2F+, and CBr2Cl+,
Int. J. Mass Spectrom. Ion Phys., 1990, 96, 111. [all data]
Griffiths, Harris, et al., 1989
Griffiths, W.J.; Harris, F.M.; Barton, J.D.,
Experimental determination of the single-ionization energies of two environmentally important free radicals, CF2Cl and CFCl2,
Rapid Commun. Mass Spectrom., 1989, 3, 283. [all data]
Tsai, Johnson, et al., 1989
Tsai, B.P.; Johnson, R.D., III; Hudgens, J.W.,
Electronic spectra of chlorodifluoromethyl and dichlorofluoromethyl radicals observed by resonance-enhanced multiphoton ionization,
J. Phys. Chem., 1989, 93, 14, 5334, https://doi.org/10.1021/j100351a004
. [all data]
Milligan, Jacox, et al., 1973
Milligan, D.E.; Jacox, M.E.; McAuley, J.H.; Smith, C.E.,
Matrix isolation study of the vacuum-ultraviolet photolysis of HCCIF2 and of HCCl2F. Infrared spectra of the parent molecules and of the ClCF2 and FCCl2 free radicals,
J. Mol. Spectrosc., 1973, 45, 3, 377, https://doi.org/10.1016/0022-2852(73)90209-9
. [all data]
Prochaska and Andrews, 1978
Prochaska, F.T.; Andrews, L.,
Matrix radiolysis and photoionization of CF2Cl2 and CF3Cl. Infrared spectra of CF2Cl+ and the parent cations,
J. Chem. Phys., 1978, 68, 12, 5577, https://doi.org/10.1063/1.435687
. [all data]
Jacox, 1994
Jacox, M.E.,
Vibrational and electronic energy levels of polyatomic transient molecules, American Chemical Society, Washington, DC, 1994, 464. [all data]
Notes
Go To: Top, Gas phase ion energetics data, Vibrational and/or electronic energy levels, References
- Symbols used in this document:
EA Electron affinity - Data from NIST Standard Reference Database 69: NIST Chemistry WebBook
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