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Boric acid, trimethyl ester

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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:
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)815.8kJ/molN/AHunter and Lias, 1998HL
Quantity Value Units Method Reference Comment
Gas basicity783.4kJ/molN/AHunter and Lias, 1998HL

Ionization energy determinations

IE (eV) Method Reference Comment
10.0PEKroner, Nolle, et al., 1973LLK
10.62EILappert, Litzow, et al., 1970RDSH
10.8 ± 0.3EIWada and Kiser, 1964RDSH
8.9 ± 0.2EILaw and Margrave, 1956RDSH
10.40PEKroner, Nolle, et al., 1973Vertical value; LLK

Appearance energy determinations

Ion AE (eV) Other Products MethodReferenceComment
B+31.6 ± 1.0?EILaw and Margrave, 1956RDSH
BO2+17.5 ± 0.3?EIWada and Kiser, 1964RDSH
BO3+13.2 ± 0.3?EIWada and Kiser, 1964RDSH
BO3+12.7 ± 1.0?EILaw and Margrave, 1956RDSH
CHO+19.1 ± 0.3?EIWada and Kiser, 1964RDSH
CH3+13.6 ± 0.5?EILaw and Margrave, 1956RDSH
CH3O+12.7 ± 0.2?EIWada and Kiser, 1964RDSH
C2H5BO2+13.2 ± 0.2?EIWada and Kiser, 1964RDSH
C2H6BO+16.6 ± 0.3?EIWada and Kiser, 1964RDSH
C2H6BO2+13.0 ± 0.2CH3OEIWada and Kiser, 1964RDSH
C2H6BO2+9.6 ± 0.2CH3OEILaw and Margrave, 1956RDSH
C2H6BO3+12.1 ± 0.2CH3EIWada and Kiser, 1964RDSH


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]

Kroner, Nolle, et al., 1973
Kroner, J.; Nolle, D.; Noth, H., Photoelektronenspektroskopische untersuchungen an bor-verbindungen, I Orbitalreihenfolgen und ladungsdichten in methylthiound methoxyborane, Z. Naturforsch. B:, 1973, 28, 416. [all data]

Lappert, Litzow, et al., 1970
Lappert, M.F.; Litzow, M.R.; Pedley, J.B.; Riley, P.N.K.; Spalding, T.R.; Tweedale, A., Bonding studies of compounds of boron and the group IV elements. Part III.First ionisation potentials of some simple boron compounds by electron impact and by a new empirical molecular orbital method, J. Chem. Soc. A, 1970, 2320. [all data]

Wada and Kiser, 1964
Wada, Y.; Kiser, R.W., A mass spectrometric study of trimethyl borate, J. Phys. Chem., 1964, 68, 1588. [all data]

Law and Margrave, 1956
Law, R.W.; Margrave, J.L., Mass spectrometer appearance potentials for positive ion fragments from BF3, B(CH3)3, B(C2H5)3, B(OCH3)3, and HB(OCH3)2, J. Chem. Phys., 1956, 25, 1086. [all data]


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