Trimethyl phosphite
- Formula: C3H9O3P
- Molecular weight: 124.0755
- IUPAC Standard InChIKey: CYTQBVOFDCPGCX-UHFFFAOYSA-N
- CAS Registry Number: 121-45-9
- 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: Phosphorous acid, trimethyl ester; Trimethoxyphosphine; P(OCH3)3; Methyl phosphite ((MeO)3P); Trimethoxyfosfin; Trimethylfosfit; UN 2329; Trimethyl ester of phosphorous acid; NSC 6513
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Gas phase ion energetics data
Go To: Top, Mass spectrum (electron ionization), Gas Chromatography, 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
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
Quantity | Value | Units | Method | Reference | Comment |
---|---|---|---|---|---|
IE (evaluated) | 8.4 | eV | N/A | N/A | L |
Quantity | Value | Units | Method | Reference | Comment |
Proton affinity (review) | 222.2 | kcal/mol | N/A | Hunter and Lias, 1998 | HL |
Quantity | Value | Units | Method | Reference | Comment |
Gas basicity | 215.1 | kcal/mol | N/A | Hunter and Lias, 1998 | HL |
Ionization energy determinations
IE (eV) | Method | Reference | Comment |
---|---|---|---|
8.4 | PE | Chattorpadhyay, Findley, et al., 1981 | LLK |
8.50 | PE | Hodges, McDonnell, et al., 1980 | LLK |
9.21 | PE | Yarbrough and Hall, 1978 | LLK |
8.4 | PE | Cowley, Goodman, et al., 1977 | LLK |
9.00 ± 0.05 | EI | Distefano, Innorta, et al., 1968 | RDSH |
8.92 | EI | Bafus, Gallegos, et al., 1966 | RDSH |
9.25 | PE | Worley, Hargis, et al., 1982 | Vertical value; LBLHLM |
9.30 | PE | Chattorpadhyay, Findley, et al., 1981 | Vertical value; LLK |
9.22 | PE | Cowley, Lattman, et al., 1977 | Vertical value; LLK |
9.40 | PE | Cowley, Goodman, et al., 1977 | Vertical value; LLK |
9.0 | PE | Betteridge, Thompson, et al., 1972 | Vertical value; LLK |
Mass spectrum (electron ionization)
Go To: Top, Gas phase ion energetics data, Gas Chromatography, 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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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. |
---|---|
Origin | Japan AIST/NIMC Database- Spectrum MS-NW- 817 |
NIST MS number | 229590 |
Gas Chromatography
Go To: Top, Gas phase ion energetics data, 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 compiled by: NIST Mass Spectrometry Data Center, William E. Wallace, director
Van Den Dool and Kratz RI, non-polar column, temperature ramp
Column type | Active phase | I | Reference | Comment |
---|---|---|---|---|
Capillary | SE-54 | 689. | Kostiainen, 2000 | 25. m/0.32 mm/0.25 μm, He, 40. C @ 1. min, 10. K/min, 280. C @ 10. min |
Normal alkane RI, non-polar column, custom temperature program
Column type | Active phase | I | Reference | Comment |
---|---|---|---|---|
Capillary | DB-5 MS | 688. | Tsunoda, 2005 | 30. m/0.25 mm/0.25 μm, Helium; Program: 45 0C (2 min) 8 0C/min -> 125 0C 15 0C/min -> 280 0C |
References
Go To: Top, Gas phase ion energetics data, Mass spectrum (electron ionization), Gas Chromatography, 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]
Chattorpadhyay, Findley, et al., 1981
Chattorpadhyay, S.; Findley, G.L.; McGlynn, S.P.,
Photoelectron spectroscopy of phosphites and phosphates,
J. Electron Spectrosc. Relat. Phenom., 1981, 24, 27. [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]
Yarbrough and Hall, 1978
Yarbrough, L.W., II; Hall, M.B.,
Photoelectron spectra of substituted chromium, molybdenum, and tungsten pentacarbonyls. Relative π-acceptor and σ-donor properties of various phosphorus ligands,
Inorg. Chem., 1978, 17, 2269. [all data]
Cowley, Goodman, et al., 1977
Cowley, A.H.; Goodman, D.W.; Kuebler, N.A.; Sanchez, M.; Verkade, J.G.,
Molecular photoelectron spectroscopic investigation of some caged phosphorus compounds and related acyclic species,
Inorg. Chem., 1977, 16, 854. [all data]
Distefano, Innorta, et al., 1968
Distefano, G.; Innorta, G.; Pignataro, S.; Foffani, A.,
Correlation between the ionization potentials of transition metal complexes and of the corresponding ligands,
J. Organometal. Chem., 1968, 14, 165. [all data]
Bafus, Gallegos, et al., 1966
Bafus, D.A.; Gallegos, E.J.; Kiser, R.W.,
An electron impact investigation of some alkyl phosphate esters,
J. Phys. Chem., 1966, 70, 2614. [all data]
Worley, Hargis, et al., 1982
Worley, S.D.; Hargis, J.H.; Chang, L.; Mattson, G.A.; Jennings, W.B.,
The UPS of some compounds containing the heteroatoms phosphorus, nitrogen and oxygen,
J. Electron Spectrosc. Relat. Phenom., 1982, 25, 135. [all data]
Cowley, Lattman, et al., 1977
Cowley, A.H.; Lattman, M.; Montag, R.A.; Verkade, J.G.,
The coordination behavior of acyclic phosphites; a UV photoelectron spectroscopic study,
Inorg. Chim. Acta, 1977, 25, 151. [all data]
Betteridge, Thompson, et al., 1972
Betteridge, D.; Thompson, M.; Baker, A.D.; Kemp, N.R.,
Photoelectron spectra of phosphorus halides, alkyl phosphites and phosphates, organophosphorus pesticides, and related compounds,
Anal. Chem., 1972, 44, 2005. [all data]
Kostiainen, 2000
Kostiainen, O.,
Gas Chromatography in Screening of Chemicals Related to the Chemical Weapons Convention
in Encyclopedia of Analytical Chemistry, Meyers, R.A., ed(s)., John Wiley Sons Ltd, Chichester, 2000, 963-979. [all data]
Tsunoda, 2005
Tsunoda, N.,
The sarin incidents in Japan and mass spectrometry,
J. MAss Spectrom. Soc. Japan, 2005, 53, 3, 157-163, https://doi.org/10.5702/massspec.53.157
. [all data]
Notes
Go To: Top, Gas phase ion energetics data, Mass spectrum (electron ionization), Gas Chromatography, References
- Symbols used in this document:
IE (evaluated) Recommended ionization energy - Data from NIST Standard Reference Database 69: NIST Chemistry WebBook
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