SiH3 anion
- Formula: H3Si-
- Molecular weight: 31.1099
- CAS Registry Number: 15807-96-2
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Reaction thermochemistry 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 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
Quantity | Value | Units | Method | Reference | Comment |
---|---|---|---|---|---|
ΔrH° | 373.9 ± 2.1 | kcal/mol | G+TS | Gal, Decouzon, et al., 2001 | gas phase |
ΔrH° | 372.9 ± 2.1 | kcal/mol | G+TS | Wetzel, Salomon, et al., 1989 | gas phase; value altered from reference due to change in acidity scale |
ΔrH° | 372.80 ± 0.84 | kcal/mol | D-EA | Nimlos and Ellison, 1986 | gas phase |
ΔrH° | 372.0 ± 2.1 | kcal/mol | G+TS | Bartmess, Scott, et al., 1979 | gas phase; value altered from reference due to change in acidity scale |
ΔrH° | 373.90 | kcal/mol | N/A | Check, Faust, et al., 2001 | gas phase; MnS-(t); ; ΔS(EA)=5.7 |
Quantity | Value | Units | Method | Reference | Comment |
ΔrG° | 365.7 ± 2.0 | kcal/mol | IMRE | Gal, Decouzon, et al., 2001 | gas phase |
ΔrG° | 364.7 ± 2.0 | kcal/mol | IMRE | Wetzel, Salomon, et al., 1989 | gas phase; value altered from reference due to change in acidity scale |
ΔrG° | 364.58 ± 0.94 | kcal/mol | H-TS | Nimlos and Ellison, 1986 | gas phase |
ΔrG° | 363.8 ± 2.0 | kcal/mol | IMRE | Bartmess, Scott, et al., 1979 | gas phase; value altered from reference due to change in acidity scale |
ΔrG° | 366.40 | kcal/mol | N/A | Check, Faust, et al., 2001 | gas phase; MnS-(t); ; ΔS(EA)=5.7 |
(H3Si- • 4294967295) + = H3Si-
By formula: (H3Si- • 4294967295H2Si) + H2Si = H3Si-
Quantity | Value | Units | Method | Reference | Comment |
---|---|---|---|---|---|
ΔrH° | 84.5 ± 1.4 | kcal/mol | N/A | Nimlos and Ellison, 1986 | gas phase |
ΔrH° | 50.6 ± 2.5 | kcal/mol | Ther | Bartmess, Scott, et al., 1979 | gas phase; value altered from reference due to change in acidity scale |
Vibrational and/or electronic energy levels
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 compiled by: Marilyn E. Jacox
State: ?
Energy (cm-1) |
Med. | Transition | λmin (nm) |
λmax (nm) |
References | ||
---|---|---|---|---|---|---|---|
Td = 11340 ± 110 | gas | Nimlos and Ellison, 1986 | |||||
State: X
Vib. sym. |
No. | Approximate type of mode |
cm-1 | Med. | Method | References | |
---|---|---|---|---|---|---|---|
a1 | 1 | Sym. stretch | 1856 | Ne | IR | Andrews and Wang, 2002 | |
2 | Umbrella | 880 ± 120 | gas | PE | Nimlos and Ellison, 1986 | ||
e | 3 | Asym. stretch | 1837 | Ne | IR | Andrews and Wang, 2002 | |
3 | Asym. stretch | 1841.7 | H2 | IR | Wang and Andrews, 2003 | ||
Additional references: Jacox, 1994, page 129
Notes
d | Photodissociation threshold |
References
Go To: Top, Reaction thermochemistry 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.
Gal, Decouzon, et al., 2001
Gal, J.F.; Decouzon, M.; Maria, P.C.; Gonzalez, A.I.; Mo, O.; Yanez, M.; El Chaouch, S.; Guillemin, J.C.,
Acidity trends in alpha,beta-unsaturated alkanes, silanes, germanes, and stannanes,
J. Am. Chem. Soc., 2001, 123, 26, 6353-6359, https://doi.org/10.1021/ja004079j
. [all data]
Wetzel, Salomon, et al., 1989
Wetzel, D.M.; Salomon, K.E.; Berger, S.; Brauman, J.I.,
Gas-Phase Acidities of Organosilanes and Electron Affinities of Organosilyl Radicals,
J. Am. Chem. Soc., 1989, 111, 11, 3835, https://doi.org/10.1021/ja00193a013
. [all data]
Nimlos and Ellison, 1986
Nimlos, M.R.; Ellison, G.B.,
Photoelectron spectroscopy of SiH3- and SiD3-,
J. Am. Chem. Soc., 1986, 108, 6522. [all data]
Bartmess, Scott, et al., 1979
Bartmess, J.E.; Scott, J.A.; McIver, R.T., Jr.,
The gas phase acidity scale from methanol to phenol,
J. Am. Chem. Soc., 1979, 101, 6047. [all data]
Check, Faust, et al., 2001
Check, C.E.; Faust, T.O.; Bailey, J.M.; Wright, B.J.; Gilbert, T.M.; Sunderlin, L.S.,
Addition of Polarization and Diffuse Functions to the LANL2DZ Basis Set for P-Block Elements,
J. Phys. Chem. A,, 2001, 105, 34, 8111, https://doi.org/10.1021/jp011945l
. [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]
Wang and Andrews, 2003
Wang, X.; Andrews, L.,
Infrared Spectra of Group 14 Hydrides in Solid Hydrogen: Experimental Observation of PbH,
J. Am. Chem. Soc., 2003, 125, 21, 6581, https://doi.org/10.1021/ja029862l
. [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, Vibrational and/or electronic energy levels, References
- Symbols used in this document:
ΔrG° Free energy of reaction at standard conditions ΔrH° Enthalpy of reaction at standard conditions - Data from NIST Standard Reference Database 69: NIST Chemistry WebBook
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