Hydroxymethyl radical
- Formula: CH3O
- Molecular weight: 31.0339
- IUPAC Standard InChIKey: CBOIHMRHGLHBPB-UHFFFAOYSA-N
- CAS Registry Number: 2597-43-5
- Chemical structure:
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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:
HL - Edward P. Hunter and Sharon G. Lias
Data compiled as indicated in comments:
LL - Sharon G. Lias and Joel F. Liebman
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
View reactions leading to CH3O+ (ion structure unspecified)
Quantity | Value | Units | Method | Reference | Comment |
---|---|---|---|---|---|
Proton affinity (review) | 695. | kJ/mol | N/A | Hunter and Lias, 1998 | HL |
Quantity | Value | Units | Method | Reference | Comment |
Gas basicity | 662.5 | kJ/mol | N/A | Hunter and Lias, 1998 | HL |
Quantity | Value | Units | Method | Reference | Comment |
ΔfH°(+) ion | 718. ± 2. | kJ/mol | N/A | N/A |
Ionization energy determinations
IE (eV) | Method | Reference | Comment |
---|---|---|---|
7.562 ± 0.004 | EVAL | Johnson and Hudgens, 1996 | LL |
7.553 ± 0.006 | PI | Berkowitz, Ellison, et al., 1994 | Unpublished results of B. Ruscic and J. Berkowitz; LL |
7.56 ± 0.02 | PI | Tao, Klemm, et al., 1992 | LL |
7.56 ± 0.01 | PE | Dyke, Ellis, et al., 1984 | LBLHLM |
7.6 | DER | Griller and Lossing, 1981 | LLK |
8.14 ± 0.15 | EI | Fisher and Henderson, 1967 | RDSH |
8.14 ± 0.01 | PE | Dyke, Ellis, et al., 1984 | Vertical value; LBLHLM |
Appearance energy determinations
Ion | AE (eV) | Other Products | Method | Reference | Comment |
---|---|---|---|---|---|
CHO+ | 8.61 | H2 | PI | Tao, Klemm, et al., 1992 | LL |
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.
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, https://doi.org/10.1063/1.556018
. [all data]
Johnson and Hudgens, 1996
Johnson, R.D., III; Hudgens, J.W.,
Structural and thermochemical properties of hydroxymethyl (CH2OH) radicals and cations derived from observations of B 2A'(3p)←X 2A" electronic spectra and from ab initio calculations,
J. Phys. Chem., 1996, 100, 19874. [all data]
Berkowitz, Ellison, et al., 1994
Berkowitz, J.; Ellison, G.B.; Gutman, D.,
Three methods to measure RH bond energies,
J. Phys. Chem., 1994, 98, 2744. [all data]
Tao, Klemm, et al., 1992
Tao, W.; Klemm, R.B.; Nesbitt, F.L.; Stief, J.L.,
A discharge flow-photoionization mass spectrometric study of hydroxymethyl radicals (H2COH and H2COD): Photoionization spectrum and ionization energy,
J. Phys. Chem., 1992, 96, 104. [all data]
Dyke, Ellis, et al., 1984
Dyke, J.M.; Ellis, A.R.; Jonathan, N.; Keddar, N.; Morris, A.,
Observation of the CH2OH radical in the gas Ppase by vacuum ultraviolet photoelectron spectroscopy,
Chem. Phys. Lett., 1984, 111, 207. [all data]
Griller and Lossing, 1981
Griller, D.; Lossing, F.P.,
On the thermochemistry of α-aminoalkyl radicals,
J. Am. Chem. Soc., 1981, 103, 1586. [all data]
Fisher and Henderson, 1967
Fisher, I.P.; Henderson, E.,
Mass spectrometry of free radicals,
J. Chem. Soc. Faraday Trans., 1967, 63, 1342. [all data]
Notes
Go To: Top, Gas phase ion energetics data, References
- Symbols used in this document:
AE Appearance energy - Data from NIST Standard Reference Database 69: NIST Chemistry WebBook
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