Borane
- Formula: BH3
- Molecular weight: 13.835
- IUPAC Standard InChIKey: UORVGPXVDQYIDP-UHFFFAOYSA-N
- CAS Registry Number: 13283-31-3
- Chemical structure:
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Reaction thermochemistry data
Go To: Top, Gas phase ion energetics data, Vibrational and/or electronic energy levels, 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: John E. Bartmess
Note: Please consider using the reaction search for this species. This page allows searching of all reactions involving this species. A general reaction search form is also available. Future versions of this site may rely on reaction search pages in place of the enumerated reaction displays seen below.
Individual Reactions
By formula: H- + H3B = (H- • H3B)
Quantity | Value | Units | Method | Reference | Comment |
---|---|---|---|---|---|
ΔrH° | 74.2 ± 2.8 | kcal/mol | Endo | Workman and Squires, 1988 | gas phase; From Endo threshold for hydride transfer to CO2 |
ΔrH° | 77.0 ± 2.0 | kcal/mol | Ther | Krivtsov, Titova, et al., 1977 | gas phase; value altered from reference due to conversion from electron convention to ion convention |
ΔrH° | 81.60 | kcal/mol | Ther | Altschuller, 1955 | gas phase |
By formula: H4B- + H3B = (H4B- • H3B)
Quantity | Value | Units | Method | Reference | Comment |
---|---|---|---|---|---|
ΔrH° | 39.4 ± 1.2 | kcal/mol | CIDT | Workman and Squires, 1988 | gas phase; CID threshold in Ar target |
By formula: CN- + H3B = (CN- • H3B)
Quantity | Value | Units | Method | Reference | Comment |
---|---|---|---|---|---|
ΔrH° | 61.1 ± 2.1 | kcal/mol | Endo | Workman and Squires, 1988 | gas phase |
H2B- + =
Quantity | Value | Units | Method | Reference | Comment |
---|---|---|---|---|---|
ΔrH° | 411.80 | kcal/mol | N/A | Bartmess and Hinde, 2005 | gas phase |
Gas phase ion energetics data
Go To: Top, Reaction thermochemistry data, Vibrational and/or electronic energy levels, References, Notes
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:
B - John E. Bartmess
LL - Sharon G. Lias and Joel F. Liebman
RDSH - Henry M. Rosenstock, Keith Draxl, Bruce W. Steiner, and John T. Herron
View reactions leading to H3B+ (ion structure unspecified)
Electron affinity determinations
EA (eV) | Method | Reference | Comment |
---|---|---|---|
0.038 ± 0.015 | LPES | Wickham-Jones, Moran, et al., 1989 | B |
Ionization energy determinations
IE (eV) | Method | Reference | Comment |
---|---|---|---|
12.026 ± 0.024 | PI | Ruscic, Mayhew, et al., 1988 | LL |
14. ± 2. | EI | Herstad, Pressley, et al., 1970 | RDSH |
11.5 ± 0.5 | EI | Steck, Pressley, et al., 1969 | RDSH |
12.2 ± 0.1 | EI | Ganguli and McGee, 1969 | RDSH |
12.3 ± 0.1 | EI | Wilson and McGee, 1967 | RDSH |
11. | EI | Baylis, Pressley, et al., 1966 | RDSH |
11.4 ± 0.2 | EI | Fehlner and Koski, 1964 | RDSH |
Appearance energy determinations
Ion | AE (eV) | Other Products | Method | Reference | Comment |
---|---|---|---|---|---|
BH+ | ≤13.372 ± 0.015 | H2 | PI | Ruscic, Mayhew, et al., 1988 | LL |
BH+ | 13.7 ± 1.0 | H2? | EI | Steck, Pressley, et al., 1969 | RDSH |
BH+ | 13.66 ± 0.02 | H2? | EI | Wilson and McGee, 1967 | RDSH |
BH2+ | ≤12.819 ± 0.020 | H | PI | Ruscic, Mayhew, et al., 1988 | LL |
BH2+ | 12.3 ± 0.5 | H | EI | Steck, Pressley, et al., 1969 | RDSH |
BH2+ | 12.95 | H | EI | Wilson and McGee, 1967 | RDSH |
De-protonation reactions
H2B- + =
Quantity | Value | Units | Method | Reference | Comment |
---|---|---|---|---|---|
ΔrH° | 411.80 | kcal/mol | N/A | Bartmess and Hinde, 2005 | gas phase; B |
Vibrational and/or electronic energy levels
Go To: Top, Reaction thermochemistry data, 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: Marilyn E. Jacox
State: X
Vib. sym. |
No. | Approximate type of mode |
cm-1 | Med. | Method | References | |
---|---|---|---|---|---|---|---|
a2 | 2 | OPLA | 1147.50 | gas | DL IR | Kawaguchi, Butler, et al., 1987 Kawaguchi, 1994 | |
2 | OPLA | 1129.2 | Ar | IR | Kaldor and Porter, 1971 Tague and Andrews, 1994 | ||
e' | 3 | BH3 stretch | 2601.57 | gas | IR | Kawaguchi, 1992 | |
3 | BH3 stretch | 2587.3 | Ar | IR | Tague and Andrews, 1994 | ||
4 | Deformation | 1196.7 | gas | IR | Kawaguchi, 1994 | ||
Additional references: Jacox, 1994, page 124; Jacox, 1998, page 212
References
Go To: Top, Reaction thermochemistry data, Gas phase ion energetics data, Vibrational and/or electronic energy levels, 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]
Krivtsov, Titova, et al., 1977
Krivtsov, N.V.; Titova, K.V.; Rosolovskii, V.Ya.,
Thermochemical study of complex borates,
Russ. J. Inorg. Chem., 1977, 22, 374. [all data]
Altschuller, 1955
Altschuller, A.P.,
Lattice Energies and Related Thermodynamic Properties of the Alkali Metal Borohydrides and of the Borohydride Ion,
J. Am. Chem. Soc., 1955, 77, 21, 5455, https://doi.org/10.1021/ja01626a001
. [all data]
Bartmess and Hinde, 2005
Bartmess, J.E.; Hinde, R.J.,
The Gas Phase Acidities of the Elemental Hydrides are Functions of Bond Lengths and Electronegativity,
Can. J. Chem., 2005, 83, 11, 2005-2012, https://doi.org/10.1139/v05-218
. [all data]
Wickham-Jones, Moran, et al., 1989
Wickham-Jones, C.T.; Moran, S.; Ellison, G.B.,
Photoelectron Spectroscopy of BH3-,
J. Chem. Phys., 1989, 90, 2, 795, https://doi.org/10.1063/1.456104
. [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]
Herstad, Pressley, et al., 1970
Herstad, O.; Pressley, G.A., Jr.; Stafford, F.E.,
Mass spectrometric investigation of the fragmentation pattern and the pyrolysis of borane carbonyl,
J. Phys. Chem., 1970, 74, 874. [all data]
Steck, Pressley, et al., 1969
Steck, S.J.; Pressley, G.A., Jr.; Stafford, F.E.,
Mass spectrometric investigation of the high-temperature reaction of hydrogen with boron carbide,
J. Phys. Chem., 1969, 73, 1000. [all data]
Ganguli and McGee, 1969
Ganguli, P.S.; McGee, H.A., Jr.,
Molecular energetics of borane carbonyl and the symmetric dissociation energy of diborane,
J. Chem. Phys., 1969, 50, 4658. [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]
Baylis, Pressley, et al., 1966
Baylis, A.B.; Pressley, G.A., Jr.; Stafford, F.E.,
Mass spectrometric investigation of the pyrolysis of boranes. IV. Diborane,
J. Am. Chem. Soc., 1966, 88, 2428. [all data]
Fehlner and Koski, 1964
Fehlner, T.P.; Koski, W.S.,
Direct detection of the borane molecule and the boryl radical by mass spectrometry,
J. Am. Chem. Soc., 1964, 86, 2733. [all data]
Kawaguchi, Butler, et al., 1987
Kawaguchi, K.; Butler, J.E.; Yamada, C.; Bauer, S.H.; Minowa, T.; Kanamori, H.; Hirota, E.,
Observation of the gas-phase infrared spectrum of BH3,
J. Chem. Phys., 1987, 87, 5, 2438, https://doi.org/10.1063/1.453135
. [all data]
Kawaguchi, 1994
Kawaguchi, K.,
Fourier transform infrared spectroscopy of the BH,
Can. J. Phys., 1994, 72, 11-12, 925, https://doi.org/10.1139/p94-122
. [all data]
Kaldor and Porter, 1971
Kaldor, A.; Porter, R.F.,
Infrared spectra of the pyrolysis products of borane carbonyl in an argon matrix,
J. Am. Chem. Soc., 1971, 93, 9, 2140, https://doi.org/10.1021/ja00738a008
. [all data]
Tague and Andrews, 1994
Tague, T.J., Jr.; Andrews, L.,
Reactions of Pulsed-Laser Evaporated Boron Atoms with Hydrogen. Infrared Spectra of Boron Hydride Intermediate Species in Solid Argon,
J. Am. Chem. Soc., 1994, 116, 11, 4970, https://doi.org/10.1021/ja00090a048
. [all data]
Kawaguchi, 1992
Kawaguchi, K.,
Fourier transform infrared spectroscopy of the BH3 ν3 band,
J. Chem. Phys., 1992, 96, 5, 3411, https://doi.org/10.1063/1.461942
. [all data]
Jacox, 1994
Jacox, M.E.,
Vibrational and electronic energy levels of polyatomic transient molecules, American Chemical Society, Washington, DC, 1994, 464. [all data]
Jacox, 1998
Jacox, M.E.,
Vibrational and electronic energy levels of polyatomic transient molecules: supplement A,
J. Phys. Chem. Ref. Data, 1998, 27, 2, 115-393, https://doi.org/10.1063/1.556017
. [all data]
Notes
Go To: Top, Reaction thermochemistry data, Gas phase ion energetics data, Vibrational and/or electronic energy levels, References
- Symbols used in this document:
AE Appearance energy EA Electron affinity ΔrH° Enthalpy of reaction at standard conditions - Data from NIST Standard Reference Database 69: NIST Chemistry WebBook
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