Dibromosilylene
- Formula: Br2Si
- Molecular weight: 187.893
- IUPAC Standard InChIKey: KBDJQNUZLNUGDS-UHFFFAOYSA-N
- CAS Registry Number: 14877-32-8
- Chemical structure:
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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:
LL - Sharon G. Lias and Joel F. Liebman
LLK - Sharon G. Lias, Rhoda D. Levin, and Sherif A. Kafafi
B - John E. Bartmess
View reactions leading to Br2Si+ (ion structure unspecified)
Electron affinity determinations
EA (eV) | Method | Reference | Comment |
---|---|---|---|
>1.7 | EIAE | Pabst, Margrave, et al., 1977 | From SiBr4; G2MP2 calculations indicate an EA of ca. 1.3 eV; B |
Ionization energy determinations
IE (eV) | Method | Reference | Comment |
---|---|---|---|
~8.5 | DER | Creasey, Lambert, et al., 1991 | LL |
12. ± 1. | EI | Farber and Srivastava, 1980 | LLK |
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 | ||
---|---|---|---|---|---|---|---|
Tx = 27600 | gas | A-X | 340 | 400 | Ruzsicska, Jodhan, et al., 1987 | ||
State: X
Vib. sym. |
No. | Approximate type of mode |
cm-1 | Med. | Method | References | |
---|---|---|---|---|---|---|---|
a1 | 1 | Sym. stretch | 402.6 | s | Ar | IR | Maass, Hauge, et al., 1972 |
b2 | 3 | Asym. stretch | 399.5 | vs | Ar | IR | Maass, Hauge, et al., 1972 |
Additional references: Jacox, 1994, page 101
Notes
s | Strong |
vs | Very strong |
x | Energy separation between the band maximum of the excited electronic state and the v = 0 level of the ground state. |
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.
Pabst, Margrave, et al., 1977
Pabst, R.E.; Margrave, J.L.; Franklin, J.L.,
Electron impact studies of the tetrachlorides and tetrabromides of silicon and germanium,
Int. J. Mass Spectrom. Ion Phys., 1977, 25, 361. [all data]
Creasey, Lambert, et al., 1991
Creasey, J.C.; Lambert, I.R.; Tuckett, R.P.; Codling, K.; Leszek, J.F.; Hatherly, P.A.; Stankiewicz, M.,
Photoionization mass-spectrometric study of fragmentation of SiBr4 and GeBr4 in the range 400-1220 A,
J. Chem. Soc. Faraday Trans., 1991, 87, 3717. [all data]
Farber and Srivastava, 1980
Farber, M.; Srivastava, R.D.,
Mass spectrometric determination of the heats of formation of the silicon bromides SiBr(g), SiBr2(g), and SiBr3(g).,
High Temp. Sci., 1980, 12, 21. [all data]
Ruzsicska, Jodhan, et al., 1987
Ruzsicska, B.; Jodhan, A.; Safarik, I.; Strausz, O.P.; Bell, T.N.,
Flash photolysis of SiBr4: the UV spectrum of SiBr2,
Chem. Phys. Lett., 1987, 139, 1, 72, https://doi.org/10.1016/0009-2614(87)80153-7
. [all data]
Maass, Hauge, et al., 1972
Maass, G.; Hauge, R.H.; Margrave, J.L.,
The I.R. Spectra of Matrix-isolated SiBr2 and SiCl2,
Z. Anorg. Allg. Chem., 1972, 392, 3, 295, https://doi.org/10.1002/zaac.19723920314
. [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:
EA Electron affinity - Data from NIST Standard Reference Database 69: NIST Chemistry WebBook
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