Phosphine, methyl-
- Formula: CH5P
- Molecular weight: 48.0242
- IUPAC Standard InChI: InChI=1S/CH5P/c1-2/h2H2,1H3
- IUPAC Standard InChIKey: SAWKFRBJGLMMES-UHFFFAOYSA-N
- CAS Registry Number: 593-54-4
- 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: Methylphosphine; CH3PH2
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Gas phase ion energetics data
Go To: Top, Mass spectrum (electron ionization), 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:
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 CH5P+ (ion structure unspecified)
| Quantity | Value | Units | Method | Reference | Comment |
|---|---|---|---|---|---|
| Proton affinity (review) | 851.5 | kJ/mol | N/A | Hunter and Lias, 1998 | HL |
| Quantity | Value | Units | Method | Reference | Comment |
| Gas basicity | 817.6 | kJ/mol | N/A | Hunter and Lias, 1998 | HL |
Ionization energy determinations
| IE (eV) | Method | Reference | Comment |
|---|---|---|---|
| 9.12 | PE | Hodges, McDonnell, et al., 1980 | LLK |
| 9.12 ± 0.07 | PE | Staley and Beauchamp, 1974 | LLK |
| 9.72 ± 0.15 | EI | Wada and Kiser, 1964 | RDSH |
| 9.62 | PE | Elbel, Dieck, et al., 1982 | Vertical value; LBLHLM |
| 9.70 | PE | Cowley, Kemp, et al., 1982 | Vertical value; LBLHLM |
| 9.6 ± 0.1 | PE | Cradock, Ebsworth, et al., 1972 | Vertical value; LLK |
Appearance energy determinations
| Ion | AE (eV) | Other Products | Method | Reference | Comment |
|---|---|---|---|---|---|
| CHP+ | 14.7 ± 0.3 | ? | EI | Wada and Kiser, 1964 | RDSH |
| CH2P+ | 14.7 ± 0.2 | ? | EI | Wada and Kiser, 1964 | RDSH |
| CH3+ | 14.8 ± 0.2 | ? | EI | Wada and Kiser, 1964 | RDSH |
| CH3P+ | 12.2 ± 0.2 | H2 | EI | Wada and Kiser, 1964 | RDSH |
| CH4P+ | 11.6 ± 0.12 | H | EI | Wada and Kiser, 1964 | RDSH |
| PC+ | 14.5 ± 0.3 | ? | EI | Wada and Kiser, 1964 | RDSH |
Mass spectrum (electron ionization)
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: NIST Mass Spectrometry Data Center, William E. Wallace, director
Spectrum
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Additional Data
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Due to licensing restrictions, this spectrum cannot be downloaded.
| Owner | NIST Mass Spectrometry Data Center Collection (C) 2014 copyright by the U.S. Secretary of Commerce on behalf of the United States of America. All rights reserved. |
|---|---|
| NIST MS number | 84 |
References
Go To: Top, Gas phase ion energetics data, Mass spectrum (electron ionization), 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]
Hodges, McDonnell, et al., 1980
Hodges, R.V.; McDonnell, T.J.; Beauchamp, J.L.,
Properties reactions of trimethyl phosphite, trimethyl phosphate, triethyl phosphate, and trimethyl phosphorothionate by ion cyclotron resonance spectroscopy,
J. Am. Chem. Soc., 1980, 102, 1327. [all data]
Staley and Beauchamp, 1974
Staley, R.H.; Beauchamp, J.L.,
Basicities ion-molecule reactions of the methylphosphines in the gas phase by ion cyclotron resonance spectroscopy,
J. Am. Chem. Soc., 1974, 96, 6252. [all data]
Wada and Kiser, 1964
Wada, Y.; Kiser, R.W.,
A mass spectrometric study of some alkyl-substituted phosphines,
J. Phys. Chem., 1964, 68, 2290. [all data]
Elbel, Dieck, et al., 1982
Elbel, S.; Dieck, H.T.; Demuth, R.,
Photoelectron sSpectra of group V compounds. IX. The relative perfluoroalkyl substituent effect,
J. Fluorine Chem., 1982, 19, 349. [all data]
Cowley, Kemp, et al., 1982
Cowley, A.H.; Kemp, R.A.; Lattman, M.; McKee, M.L.,
Lewis base behavior of methylated and fluorinated phosphines. A photoelectron spectroscopic investigation,
Inorg. Chem., 1982, 21, 85. [all data]
Cradock, Ebsworth, et al., 1972
Cradock, S.; Ebsworth, E.A.V.; Savage, W.J.; Whiteford, R.A.,
Photoelectron spectra of some methyl, silyl and germyl amines, phosphines and arsines,
J. Chem. Soc. Faraday Trans. 2, 1972, 68, 934. [all data]
Notes
Go To: Top, Gas phase ion energetics data, Mass spectrum (electron ionization), References
- Symbols used in this document:
AE Appearance energy - Data from NIST Standard Reference Database 69: NIST Chemistry WebBook
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