Boron dihydride
- Formula: BH2
- Molecular weight: 12.827
- CAS Registry Number: 14452-64-3
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Gas phase ion energetics data
Go To: Top, 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
RDSH - Henry M. Rosenstock, Keith Draxl, Bruce W. Steiner, and John T. Herron
View reactions leading to H2B+ (ion structure unspecified)
Ionization energy determinations
| IE (eV) | Method | Reference | Comment |
|---|---|---|---|
| 9.8 ± 0.2 | EI | Fehlner and Koski, 1964 | RDSH |
De-protonation reactions
HB- + = H2B
| Quantity | Value | Units | Method | Reference | Comment |
|---|---|---|---|---|---|
| ΔrH° | 389.3 ± 6.6 | kcal/mol | D-EA | Reid, 1993 | gas phase; B |
Vibrational and/or electronic energy levels
Go To: Top, 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: A
| Energy (cm-1) |
Med. | Transition | λmin (nm) |
λmax (nm) |
References | ||
|---|---|---|---|---|---|---|---|
| To = 4194.1 | gas | A-X | 640 | 870 | Herzberg and Johns, 1967 | ||
| Vib. sym. |
No. | Approximate type of mode |
cm-1 | Med. | Method | References | |
|---|---|---|---|---|---|---|---|
| a1 | 2 | Bend | 953.6 | gas | AB | Herzberg and Johns, 1967 | |
Additional references: Jacox, 1994, page 17
Notes
| o | Energy separation between the v = 0 levels of the excited and electronic ground states. |
References
Go To: Top, 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.
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]
Reid, 1993
Reid, C.J.,
Electron Affinities of BH, B2, BC, and BN molecules determined using Charge Inversion Spectrometry,
Int. J. Mass Spectrom. Ion Proc., 1993, 127, 147, https://doi.org/10.1016/0168-1176(93)87087-9
. [all data]
Herzberg and Johns, 1967
Herzberg, G.; Johns, J.W.C.,
The Spectrum and Structure of the Free BHFormula Radical,
Proc. Roy. Soc. (London) A298, 1967, 298, 1453, 142, https://doi.org/10.1098/rspa.1967.0096
. [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]
Notes
Go To: Top, Gas phase ion energetics data, Vibrational and/or electronic energy levels, References
- Symbols used in this document:
ΔrH° Enthalpy of reaction at standard conditions - Data from NIST Standard Reference Database 69: NIST Chemistry WebBook
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