SiH2 radical anion
- Formula: H2Si-
- Molecular weight: 30.1019
- CAS Registry Number: 54991-62-7
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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
(H2Si- • 4294967295) +
= H2Si-
By formula: (H2Si- • 4294967295HSi) + HSi = H2Si-
Quantity | Value | Units | Method | Reference | Comment |
---|---|---|---|---|---|
ΔrH° | 83.4 ± 2.3 | kcal/mol | N/A | Kasdan, Herbst, et al., 1975 | gas phase |
Quantity | Value | Units | Method | Reference | Comment |
---|---|---|---|---|---|
ΔrH° | 357.2 ± 1.4 | kcal/mol | D-EA | Kasdan, Herbst, et al., 1975 | gas phase |
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 compiled by: John E. Bartmess
Protonation reactions
Quantity | Value | Units | Method | Reference | Comment |
---|---|---|---|---|---|
ΔrH° | 357.2 ± 1.4 | kcal/mol | D-EA | Kasdan, Herbst, et al., 1975 | gas phase |
Vibrational and/or electronic energy levels
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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: Marilyn E. Jacox
State: A
Energy (cm-1) |
Med. | Transition | λmin (nm) |
λmax (nm) |
References | ||
---|---|---|---|---|---|---|---|
Td = 9070 ± 160 | gas | Kasdan, Herbst, et al., 1975 | |||||
State: X
Vib. sym. |
No. | Approximate type of mode |
cm-1 | Med. | Method | References | |
---|---|---|---|---|---|---|---|
a1b2 | 1,3 | Stretch | 1823 | Ne | IR | Andrews and Wang, 2002 | |
a1 | 2 | Bend | 1200 ± 160 | gas | PE | Kasdan, Herbst, et al., 1975 | |
Additional references: Jacox, 1994, page 21
Notes
d | Photodissociation threshold |
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.
Kasdan, Herbst, et al., 1975
Kasdan, A.; Herbst, E.; Lineberger, W.C.,
Laser photoelectron spectrometry of the negative ions of silicon and its hydrides,
J. Chem. Phys., 1975, 62, 541. [all data]
Andrews and Wang, 2002
Andrews, L.; Wang, X.,
Infrared Spectra of the Novel Si,
J. Phys. Chem. A, 2002, 106, 34, 7696, https://doi.org/10.1021/jp0204814
. [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, Reaction thermochemistry data, 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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