Dichloromethyl radical
- Formula: CHCl2
- Molecular weight: 83.925
- IUPAC Standard InChIKey: ZJULYDCRWUEPTK-UHFFFAOYSA-N
- CAS Registry Number: 3474-12-2
- 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:
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
B - John E. Bartmess
View reactions leading to CHCl2+ (ion structure unspecified)
Electron affinity determinations
EA (eV) | Method | Reference | Comment |
---|---|---|---|
1.52 ± 0.11 | D-EA | Born, Ingemann, et al., 2000 | D-EA from this reference yields BDE = 96.0±3.2 kcal/mol; B |
1.472 ± 0.043 | IMRB | Born, Ingemann, et al., 2000 | B |
1.30 ± 0.20 | LPES | Vogelhuber, Wren, et al., 2011 | very poor Franck-Condon overlap; "estimate; B |
1.57 ± 0.14 | D-EA | Bohme, Lee-Ruff, et al., 1972 | Comparable to DMSO; value altered from reference due to change in acidity scale; B |
Ionization energy determinations
IE (eV) | Method | Reference | Comment |
---|---|---|---|
8.32 ± 0.01 | PE | Andrews, Dyke, et al., 1984 | LBLHLM |
8.45 | EI | Lossing, 1972 | LLK |
9.30 | EI | Lossing, Kebarle, et al., 1959 | RDSH |
9.54 ± 0.10 | EI | Reed and Snedden, 1956 | RDSH |
8.54 ± 0.01 | PE | Andrews, Dyke, et al., 1984 | Vertical value; LBLHLM |
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: 3d
Energy (cm-1) |
Med. | Transition | λmin (nm) |
λmax (nm) |
References | ||
---|---|---|---|---|---|---|---|
To = 54024 ± 10 | gas | 3d-X | 179 | 185 | Long and Hudgens, 1987 | ||
Vib. sym. |
No. | Approximate type of mode |
cm-1 | Med. | Method | References | |
---|---|---|---|---|---|---|---|
a1 | 2 | CCl2 s-stretch | 845 ± 10 | gas | MPI | Long and Hudgens, 1987 | |
State: X
Vib. sym. |
No. | Approximate type of mode |
cm-1 | Med. | Method | References | |
---|---|---|---|---|---|---|---|
a' | 4 | Deformation | 190 ± 50 | gas | PE | Vogelhuber, Wren, et al., 2011 | |
a | 5 | HCCl deform. | 1226 | m | Ar | IR | Carver and Andrews, 1969 Fridgen, Zhang, et al., 2000 |
5 | HCCl deform. | 1222 | Kr | IR | Fridgen, Zhang, et al., 2000 | ||
6 | CCl2 a-stretch | 902 | vs | Ar | IR | Carver and Andrews, 1969 Fridgen, Zhang, et al., 2000 | |
6 | CCl2 a-stretch | 896 | Kr | IR | Fridgen, Zhang, et al., 2000 | ||
Additional references: Jacox, 1994, page 177; Jacox, 2003, page 199; Rogers, Abramowitz, et al., 1970
Notes
m | Medium |
vs | Very strong |
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.
Born, Ingemann, et al., 2000
Born, M.; Ingemann, S.; Nibbering, N.M.M.,
Thermochemical properties of halogen-substituted methanes, methyl radicals, and carbenes in the gas phase,
Int. J. Mass Spectrom., 2000, 194, 2-3, 103-113, https://doi.org/10.1016/S1387-3806(99)00125-6
. [all data]
Vogelhuber, Wren, et al., 2011
Vogelhuber, K.M.; Wren, S.W.; McCoy, A.B.; Ervin, K.M.; Lineberger, W.C.,
Photoelectron spectra of dihalomethyl anions: Testing the limits of normal mode analysis,
J. Chem. Phys., 2011, 134, 18, 184306, https://doi.org/10.1063/1.3585606
. [all data]
Bohme, Lee-Ruff, et al., 1972
Bohme, D.K.; Lee-Ruff, E.; Young, L.B.,
Acidity order of selected bronsted acids in the gas phase at 300K,
J. Am. Chem. Soc., 1972, 94, 5153. [all data]
Andrews, Dyke, et al., 1984
Andrews, L.; Dyke, J.M.; Jonathan, N.; Keddar, N.; Morris, A.,
Photoelectron spectroscopic study of the ground states of CH2Cl+, CHCl2+, and CHFCl+,
J. Am. Chem. Soc., 1984, 106, 299. [all data]
Lossing, 1972
Lossing, F.P.,
Free radicals by mass spectrometry. XLIV. Ionization potentials bond dissociation energies for chloro-and fluoromethyl radicals,
Bull. Soc. Chim. Belg., 1972, 81, 125. [all data]
Lossing, Kebarle, et al., 1959
Lossing, F.P.; Kebarle, P.; DeSousa, J.B.,
Ionization potentials of alkyl and halogenated alkyl free radicals, 1959. [all data]
Reed and Snedden, 1956
Reed, R.I.; Snedden, W.,
Studies in electron impact methods. Part 6.-The formation of the methine and carbon ions,
J. Chem. Soc. Faraday Trans., 1956, 55, 876. [all data]
Long and Hudgens, 1987
Long, G.R.; Hudgens, J.W.,
Resonance enhanced multiphoton ionization spectroscopy of dichloromethyl and dichloromethyl-d radicals,
J. Phys. Chem., 1987, 91, 23, 5870, https://doi.org/10.1021/j100307a011
. [all data]
Carver and Andrews, 1969
Carver, T.G.; Andrews, L.,
Matrix Infrared Spectrum and Bonding in the Dichloromethyl Radical,
J. Chem. Phys., 1969, 50, 10, 4235, https://doi.org/10.1063/1.1670888
. [all data]
Fridgen, Zhang, et al., 2000
Fridgen, T.D.; Zhang, X.K.; Parnis, J.M.; March, R.E.,
Isomerization and Fragmentation Products of CH,
J. Phys. Chem. A, 2000, 104, 16, 3487, https://doi.org/10.1021/jp993162u
. [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]
Jacox, 2003
Jacox, M.E.,
Vibrational and electronic energy levels of polyatomic transient molecules: supplement B,
J. Phys. Chem. Ref. Data, 2003, 32, 1, 1-441, https://doi.org/10.1063/1.1497629
. [all data]
Rogers, Abramowitz, et al., 1970
Rogers, E.E.; Abramowitz, S.; Jacox, M.E.; Milligan, D.E.,
Matrix-Isolation Studies of the Infrared Spectra of the Free Radicals CCl3 and CBr3,
J. Chem. Phys., 1970, 52, 5, 2198, https://doi.org/10.1063/1.1673285
. [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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