Methane, diiodo-
- Formula: CH2I2
- Molecular weight: 267.8355
- IUPAC Standard InChI: InChI=1S/CH2I2/c2-1-3/h1H2
- IUPAC Standard InChIKey: NZZFYRREKKOMAT-UHFFFAOYSA-N
- CAS Registry Number: 75-11-6
- 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: Diiodomethane; Methylene diiodide; Methylene iodide; CH2I2; Dijodmethan; Methylenjodid; MI-Gee; Methyl diiodide; Mi-gee brand; NSC 35804
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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:
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
| Quantity | Value | Units | Method | Reference | Comment |
|---|---|---|---|---|---|
| IE (evaluated) | 9.46 ± 0.02 | eV | N/A | N/A | L |
Ionization energy determinations
| IE (eV) | Method | Reference | Comment |
|---|---|---|---|
| 9.46 ± 0.02 | PI | Tsai, Baer, et al., 1975 | LLK |
| 9.46 | PE | Von Niessen, Asbrink, et al., 1982 | Vertical value; LBLHLM |
| 9.46 | PE | Potts, Lempka, et al., 1970 | Vertical value; RDSH |
Appearance energy determinations
| Ion | AE (eV) | Other Products | Method | Reference | Comment |
|---|---|---|---|---|---|
| CH2I+ | 10.42 | I | EI | Holmes, Lossing, et al., 1988 | LL |
| CH2I+ | 10.55 ± 0.02 | I | PI | Tsai, Baer, et al., 1975 | LLK |
| I+ | 13.2 ± 0.1 | CH2I | EI | DeCorpo, Bafus, et al., 1971 | LLK |
| I+ | 13.8 | CH2I | EI | Franklin and Haney, 1970 | RDSH |
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.
Tsai, Baer, et al., 1975
Tsai, B.P.; Baer, T.; Werner, A.S.; Lin, S.F.,
A photoelectron-photoion coincidence study of the ionization and fragment appearance potentials of bromo- and iodomethanes,
J. Phys. Chem., 1975, 79, 570. [all data]
Von Niessen, Asbrink, et al., 1982
Von Niessen, W.; Asbrink, L.; Bieri, G.,
30.4 nm He(II) Photoelectron spectra of organic molecules. Part VI. Halogeno-compounds (C,H,X: X = Cl, Br, I),
J. Electron Spectrosc. Relat. Phenom., 1982, 26, 173. [all data]
Potts, Lempka, et al., 1970
Potts, A.W.; Lempka, H.J.; Streets, D.G.; Price, W.C.,
Photoelectron spectra of the halides of elements in groups III, IV, V and VI,
Phil. Trans. Roy. Soc. (London), 1970, A268, 59. [all data]
Holmes, Lossing, et al., 1988
Holmes, J.L.; Lossing, F.P.; McFarlane, R.A.,
Stabilization energy and positional effects in halogen-substituted alkyl ions.,
Int. J. Mass Spectrom. Ion Phys., 1988, 86, 209. [all data]
DeCorpo, Bafus, et al., 1971
DeCorpo, J.J.; Bafus, D.A.; Franklin, J.L.,
Enthalpies of formation of the monohalomethyl radicals from mass spectrometric studies of the dihalomethanes,
J. Chem. Thermodyn., 1971, 3, 125. [all data]
Franklin and Haney, 1970
Franklin, J.L.; Haney, M.A.,
Energy distribution in ionic decomposition processes, Recent Developments in Mass Spectroscopy, ed. K. Ogata and T. Hayakawa Baltimore Univ. Park Press, Baltimore, MD, 1970, 909. [all data]
Notes
Go To: Top, Gas phase ion energetics data, References
- Symbols used in this document:
AE Appearance energy IE (evaluated) Recommended ionization energy - Data from NIST Standard Reference Database 69: NIST Chemistry WebBook
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