Si4 anion
- Formula: Si4-
- Molecular weight: 112.3425
- CAS Registry Number: 106389-61-1
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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
By formula: (Si4- • 4294967295Si) + Si = Si4-
Quantity | Value | Units | Method | Reference | Comment |
---|---|---|---|---|---|
ΔrH° | 98.2 ± 6.9 | kcal/mol | N/A | Nakajima, Taguwa, et al., 1995 | gas phase; Vertical Detachment Energy: 2.15±0.04 eV. |
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 = 17180 ± 80 | gas | Kitsopoulos, Chick, et al., 1990 | |||||
Arnold and Neumark, 1993 | |||||||
Xu, Taylor, et al., 1998 | |||||||
State: A
Energy (cm-1) |
Med. | Transition | λmin (nm) |
λmax (nm) |
References | ||
---|---|---|---|---|---|---|---|
To = 11438 | gas | A-X | 747 | 875 | Achiba, Kohno, et al., 2005 | ||
To = 11460 ± 3 | Ne | A-X | 780 | 875 | Fulara, Freivogel, et al., 1996 | ||
Vib. sym. |
No. | Approximate type of mode |
cm-1 | Med. | Method | References | |
---|---|---|---|---|---|---|---|
Ag | 1 | 343 | gas | MPD | Achiba, Kohno, et al., 2005 | ||
ag | 1 | 352 ± 4 | Ne | AB | Fulara, Freivogel, et al., 1996 | ||
2 | 277 | gas | MPD | Achiba, Kohno, et al., 2005 | |||
2 | 278 ± 4 | Ne | AB | Fulara, Freivogel, et al., 1996 | |||
State: X
Vib. sym. |
No. | Approximate type of mode |
cm-1 | Med. | Method | References | |
---|---|---|---|---|---|---|---|
ag | 2 | 365 | gas | TPE | Arnold and Neumark, 1993 | ||
Additional references: Jacox, 1994, page 183; Jacox, 1998, page 247; Jacox, 2003, page 218
Notes
o | Energy separation between the v = 0 levels of the excited and electronic ground states. |
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.
Nakajima, Taguwa, et al., 1995
Nakajima, A.; Taguwa, T.; Nakao, K.; Gomei, M.; Kishi, R.; Iwata, S.; Kaya, K.,
Photoelectron Spectroscopy of silicon-carbon cluster Anions (SinCm-),
J. Chem. Phys., 1995, 103, 6, 2050, https://doi.org/10.1063/1.469731
. [all data]
Kitsopoulos, Chick, et al., 1990
Kitsopoulos, T.N.; Chick, C.J.; Weaver, A.; Neumark, D.M.,
Vibrationally Resolved Photoelectron Spectra of Si-3- and Si-4-,
J. Chem. Phys., 1990, 93, 8, 6108, https://doi.org/10.1063/1.459004
. [all data]
Arnold and Neumark, 1993
Arnold, C.C.; Neumark, D.M.,
Study of Si4 and Si4- using threshold photodetachment (ZEKE) spectroscopy,
J. Chem. Phys., 1993, 99, 5, 3353, https://doi.org/10.1063/1.465145
. [all data]
Xu, Taylor, et al., 1998
Xu, C.; Taylor, T.R.; Burton, G.R.; Neumark, D.M.,
Vibrationally resolved photoelectron spectroscopy of silicon cluster anions Si[sub n][sup -] (n=3--7),
J. Chem. Phys., 1998, 108, 4, 1395, https://doi.org/10.1063/1.475511
. [all data]
Achiba, Kohno, et al., 2005
Achiba, Y.; Kohno, M.; Ohara, M.; Suzuki, S.; Shiromaru, H.,
Electron detachment spectroscopic study on carbon and silicon cluster anions,
J. Electron Spectrosc. Relat. Phenom., 2005, 142, 3, 231, https://doi.org/10.1016/j.elspec.2004.09.016
. [all data]
Fulara, Freivogel, et al., 1996
Fulara, J.; Freivogel, P.; Grutter, M.; Maier, J.P.,
Electronic Absorption Spectra of Si,
J. Phys. Chem., 1996, 100, 46, 18042, https://doi.org/10.1021/jp962575h
. [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]
Jacox, 2003
Jacox, M.E.,
Vibrational and electronic energy levels of polyatomic transient molecules: supplement B,
J. Phys. Chem. Ref. Data, 2003, 32, 1, 1-441, https://doi.org/10.1063/1.1497629
. [all data]
Notes
Go To: Top, Reaction thermochemistry 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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