Diborane

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Reaction thermochemistry 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 by: John E. Bartmess

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Individual Reactions

Hydrogen anion + Diborane = (Hydrogen anion • Diborane)

By formula: H- + H6B2 = (H- • H6B2)

Quantity Value Units Method Reference Comment
Δr309.6kJ/molTherWorkman and Squires, 1988gas phase; Calculated from data on BH3..BH4-

Gas phase ion energetics data

Go To: Top, Reaction thermochemistry data, 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:
LL - Sharon G. Lias and Joel F. Liebman
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)11.38 ± 0.05eVN/AN/AL
Quantity Value Units Method Reference Comment
Proton affinity (review)615.kJ/molN/AHunter and Lias, 1998HL
Quantity Value Units Method Reference Comment
Gas basicity586.0kJ/molN/AHunter and Lias, 1998HL

Ionization energy determinations

IE (eV) Method Reference Comment
≤11.37 ± 0.05PIRuscic, Mayhew, et al., 1988LL
11.4PEAsbrink, Svensson, et al., 1981LLK
11.41 ± 0.02PELloyd and Lynaugh, 1970RDSH
11.38 ± 0.01PEBrundle, Robin, et al., 1970RDSH
20.2 ± 0.1PEBrundle, Robin, et al., 1970RDSH
11.37 ± 0.01PERose, Frey, et al., ibid.RDSH
11.9PEAsbrink, Svensson, et al., 1981Vertical value; LLK

Appearance energy determinations

Ion AE (eV) Other Products MethodReferenceComment
B+18.39 ± 0.02?EIWilson and McGee, 1967RDSH
BH+16.4 ± 0.3?EIWilson and McGee, 1967RDSH
BH2+≤14.840 ± 0.017BH3+HPIRuscic, Mayhew, et al., 1988LL
BH2+15.5 ± 0.05?EIWilson and McGee, 1967RDSH
BH2+13.4 ± 0.1?EIKoski, Kaufman, et al., 1958RDSH
BH2+13.5 ± 0.5?EIMargrave, 1957RDSH
BH3+≤14.31BH3PIRuscic, Mayhew, et al., 1988LL
BH3+14.88 ± 0.05BH3?EIWilson and McGee, 1967RDSH
BH3+13.1 ± 0.2BH3?EIKoski, Kaufman, et al., 1958RDSH
BH3+12.1 ± 0.2BH3?EIMargrave, 1957RDSH
B2+21.1 ± 0.23H2EIKoski, Kaufman, et al., 1958RDSH
B2+26.3 ± 0.5?EIMargrave, 1957RDSH
B2H+21.4 ± 0.52H2+HEIMargrave, 1957RDSH
B2H2+≤13.252H2PIRuscic, Mayhew, et al., 1988LL
B2H2+14.1 ± 0.22H2EIFehlner and Koski, 1964RDSH
B2H2+13.8 ± 0.12H2EIKoski, Kaufman, et al., 1958RDSH
B2H2+13.8 ± 0.22H2EIMargrave, 1957RDSH
B2H3+≤14.15H2+HPIRuscic, Mayhew, et al., 1988LL
B2H3+14.3 ± 0.2H2+HEIFehlner and Koski, 1964RDSH
B2H3+14.2 ± 0.1H2+HEIKoski, Kaufman, et al., 1958RDSH
B2H3+14.8 ± 0.5H2+HEIMargrave, 1957RDSH
B2H4+≤11.75H2PIRuscic, Mayhew, et al., 1988LL
B2H4+12.3 ± 0.2H2EIFehlner and Koski, 1964RDSH
B2H4+12.3 ± 0.1H2EIKoski, Kaufman, et al., 1958RDSH
B2H4+12.4 ± 0.3H2EIMargrave, 1957RDSH
B2H5+≤11.40 ± 0.05HPIRuscic, Mayhew, et al., 1988LL
B2H5+11.8 ± 0.1HEIWilson and McGee, 1967RDSH
B2H5+12.0 ± 0.1HEIFehlner and Koski, 1964RDSH
B2H5+11.9 ± 0.1HEIKoski, Kaufman, et al., 1958RDSH
B2H5+12.0 ± 0.3HEIMargrave, 1957RDSH

References

Go To: Top, Reaction thermochemistry data, 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.

Workman and Squires, 1988
Workman, D.B.; Squires, R.R., Hydride Binding Energies of Boranes, Inorg. Chem., 1988, 27, 11, 1846, https://doi.org/10.1021/ic00284a003 . [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]

Ruscic, Mayhew, et al., 1988
Ruscic, B.; Mayhew, C.A.; Berkowitz, J., Photoionization studies of (BH3)n(n=1,2), J. Chem. Phys., 1988, 88, 5580. [all data]

Asbrink, Svensson, et al., 1981
Asbrink, L.; Svensson, A.; Von Niessen, W.; Bieri, G., 30.4 nm He(II) photoelectron spectra of organic molecules, J. Electron Spectrosc. Relat. Phenom., 1981, 24, 293. [all data]

Lloyd and Lynaugh, 1970
Lloyd, D.R.; Lynaugh, N., Photoelectron studies of boron compounds. I. Diborane, borazine and B-trifluoroborazine, Phil. Trans. Roy. Soc. (London), 1970, A268, 97. [all data]

Brundle, Robin, et al., 1970
Brundle, C.R.; Robin, M.B.; Basch, H.; Pinsky, M.; Bond, A., Experimental and theoretical comparison of the electronic structures of ethylene and diborane, J. Am. Chem. Soc., 1970, 92, 3863. [all data]

Rose, Frey, et al., ibid.
Rose, T.; Frey, R.; Brehm, B., The electronic states of the diborane ion determined by photoelectron spectroscopy, Chem. Commun. 1969,,1518; Erratum,, ibid., 1970, ,460. [all data]

Wilson and McGee, 1967
Wilson, J.H.; McGee, H.A., Jr., Mass-spectrometric studies of the synthesis, energetics, and cryogenic stability of the lower boron hydrides, J. Chem. Phys., 1967, 46, 1444. [all data]

Koski, Kaufman, et al., 1958
Koski, W.S.; Kaufman, J.J.; Pachucki, C.F.; Shipko, F.J., A mass spectrometric appearance potential study of isotopically labeled diboranes, J. Am. Chem. Soc., 1958, 80, 3202. [all data]

Margrave, 1957
Margrave, J.L., A mass spectrometric appearance potential study of diborane, J. Phys. Chem., 1957, 61, 38. [all data]

Fehlner and Koski, 1964
Fehlner, T.P.; Koski, W.S., The fragmentation of some boron hydrides by electron impact, J. Am. Chem. Soc., 1964, 86, 581. [all data]


Notes

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