Dibromosilylene


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 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
>1.7EIAEPabst, Margrave, et al., 1977From SiBr4; G2MP2 calculations indicate an EA of ca. 1.3 eV; B

Ionization energy determinations

IE (eV) Method Reference Comment
~8.5DERCreasey, Lambert, et al., 1991LL
12. ± 1.EIFarber and Srivastava, 1980LLK

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

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

sStrong
vsVery strong
xEnergy 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

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