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Phosphoric acid, trimethyl ester


Phase change 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 compiled as indicated in comments:
AC - William E. Acree, Jr., James S. Chickos

Quantity Value Units Method Reference Comment
Deltavap47.5kJ/molCGCPanneerselvam, Antony, et al., 2007Based on data from 408. - 438. K.; AC

Enthalpy of vaporization

DeltavapH (kJ/mol) Temperature (K) Method Reference Comment
48.8311.AStephenson and Malanowski, 1987Based on data from 296. - 466. K. See also Stull, 1947.; AC

Antoine Equation Parameters

log10(P) = A − (B / (T + C))
    P = vapor pressure (bar)
    T = temperature (K)

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Temperature (K) A B C Reference Comment
299. - 465.94.968172249.287-12.294Stull, 1947Coefficents calculated by NIST from author's data.

Gas phase ion energetics data

Go To: Top, Phase change data, IR Spectrum, 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:
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
Proton affinity (review)890.6kJ/molN/AHunter and Lias, 1998HL
Quantity Value Units Method Reference Comment
Gas basicity860.8kJ/molN/AHunter and Lias, 1998HL

Ionization energy determinations

IE (eV) Method Reference Comment
10.0PEChattorpadhyay, Findley, et al., 1981LLK
9.99PEHodges, McDonnell, et al., 1980LLK
10.70 ± 0.10EISantoro, 1973LLK
10.77 ± 0.30EIBafus, Gallegos, et al., 1966RDSH
10.90PEChattorpadhyay, Findley, et al., 1981Vertical value; LLK
10.82PECowley, Lattman, et al., 1977Vertical value; LLK
10.81PEVovna, Lopatin, et al., 1975Vertical value; LLK

Appearance energy determinations

Ion AE (eV) Other Products MethodReferenceComment
CHO+17.3 ± 0.4?EIBafus, Gallegos, et al., 1966RDSH
CH3+17.90 ± 0.40?EISantoro, 1973LLK
CH3+18.6 ± 0.3?EIBafus, Gallegos, et al., 1966RDSH
CH3O+17.3 ± 0.4?EIBafus, Gallegos, et al., 1966RDSH
CH4O2P+14.90 ± 0.202HCHO+HEISantoro, 1973LLK
CH4O2P+15.1 ± 0.2?EIBafus, Gallegos, et al., 1966RDSH
CH4O3P+13.90 ± 0.20HCHO+CH3EISantoro, 1973LLK
CH4O3P+14.4 ± 0.3?EIBafus, Gallegos, et al., 1966RDSH
CH5O2P+12.91 ± 0.102HCHOEISantoro, 1973LLK
CH5O2P+13.9 ± 0.4?EIBafus, Gallegos, et al., 1966RDSH
C2H5O+14.0 ± 0.2?EIBafus, Gallegos, et al., 1966RDSH
C2H6O3P+14.1 ± 0.20HCHO+HEISantoro, 1973LLK
C2H6O3P+14.1?EIBafus, Gallegos, et al., 1966RDSH
C2H7O3P+11.62 ± 0.10HCHOEISantoro, 1973LLK
C2H7O3P+11.9 ± 0.2CH2OEIBafus, Gallegos, et al., 1966RDSH
C3H8O4P+12.73 ± 0.20HEISantoro, 1973LLK
PH2O2+15.1 ± 0.3?EIBafus, Gallegos, et al., 1966RDSH
OP+18.90 ± 0.50O+CH3O+2HEISantoro, 1973LLK
PO+19.6 ± 0.3?EIBafus, Gallegos, et al., 1966RDSH

IR Spectrum

Go To: Top, Phase change data, Gas phase ion energetics data, Mass spectrum (electron ionization), References, Notes

Data compiled by: Coblentz Society, Inc.

Data compiled by: Tanya L. Myers, Russell G. Tonkyn, Ashley M. Oeck, Tyler O. Danby, John S. Loring, Matthew S. Taubman, Stephen W. Sharpe, Jerome C. Birnbaum, and Timothy J. Johnson

Data compiled by: NIST Mass Spectrometry Data Center, William E. Wallace, director


Mass spectrum (electron ionization)

Go To: Top, Phase change data, Gas phase ion energetics data, IR Spectrum, 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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Mass 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 ACCUSTANDARD Chemicals / NIST MS Data Center.
NIST MS number 125515

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References

Go To: Top, Phase change data, Gas phase ion energetics data, IR Spectrum, 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.

Panneerselvam, Antony, et al., 2007
Panneerselvam, K.; Antony, M.P.; Srinivasan, T.G.; Rao, P.R. Vasudeva, Measurement of enthalpies of vaporization of trialkyl phosphates using correlation gas chromatography, Thermochimica Acta, 2007, 466, 1-2, 49-56, https://doi.org/10.1016/j.tca.2007.10.007 . [all data]

Stephenson and Malanowski, 1987
Stephenson, Richard M.; Malanowski, Stanislaw, Handbook of the Thermodynamics of Organic Compounds, 1987, https://doi.org/10.1007/978-94-009-3173-2 . [all data]

Stull, 1947
Stull, Daniel R., Vapor Pressure of Pure Substances. Organic and Inorganic Compounds, Ind. Eng. Chem., 1947, 39, 4, 517-540, https://doi.org/10.1021/ie50448a022 . [all data]

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]

Santoro, 1973
Santoro, E., The fragmentation of some alkyl thiophosphate esters by electron-impact, Org. Mass Spectrom., 1973, 7, 589. [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]

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]

Vovna, Lopatin, et al., 1975
Vovna, V.I.; Lopatin, S.N.; Pettsol'd, R.; Vilesov, F.I., Photoelectron spectra and electronic structure of some phosphoryl compounds, Khim. Vys. Energ., 1975, 9, 9. [all data]


Notes

Go To: Top, Phase change data, Gas phase ion energetics data, IR Spectrum, Mass spectrum (electron ionization), References