HSiBr

Formula: BrHSi
Molecular weight: 108.997
CAS Registry Number: 13569-45-4
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Vibrational and/or electronic energy levels

State: A

Energy (cm^-1)	Med.	Transition	λ_min (nm)	λ_max (nm)	References


T_o = 19902.851 ± 0.007	gas	A-X	429	620	Herzberg and Verma, 1964
					Harjanto, Harper, et al., 1996

Vib. sym.	No.	Approximate type of mode	cm^-1	Med.	Method	References


a'	1	SiH stretch	1787.0	gas	LF	Harjanto, Harper, et al., 1996
	2	Bend	535.3	gas	UV LF	Herzberg and Verma, 1964 Harjanto, Harper, et al., 1996
	3	SiBr stretch	416.5	gas	UV LF	Herzberg and Verma, 1964 Harjanto, Harper, et al., 1996

State: X

Vib. sym.	No.	Approximate type of mode	cm^-1	Med.	Method	References


a'	1	SiH stretch	1976	gas	LF	Harjanto, Harper, et al., 1996 Hostutler, Ndiege, et al., 2001
	2	Bend	772.4 ± 0.3	gas	UV LF	Herzberg and Verma, 1964 Harjanto, Harper, et al., 1996 Hostutler, Ndiege, et al., 2001
	3	SiBr stretch	412.7 ± 0.5	gas	UV LF	Herzberg and Verma, 1964 Harjanto, Harper, et al., 1996 Hostutler, Ndiege, et al., 2001

Additional references: Jacox, 1994, page 44; Jacox, 1998, page 151; Jacox, 2003, page 40; Tackett, Clouthier, et al., 2005

Notes

Energy separation between the v = 0 levels of the excited and electronic ground states.

References

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Herzberg and Verma, 1964
Herzberg, G.; Verma, R.D., SPECTRA AND STRUCTURES OF THE FREE HSiCl AND HSiBr RADICALS, Can. J. Phys., 1964, 42, 3, 395, https://doi.org/10.1139/p64-038 . [all data]

Harjanto, Harper, et al., 1996
Harjanto, H.; Harper, W.W.; Clouthier, D.J., Resolution of anomalies in the geometry and vibrational frequencies of monobromosilylene (HSiBr) by pulsed discharge jet spectroscopy, J. Chem. Phys., 1996, 105, 23, 10189, https://doi.org/10.1063/1.472962 . [all data]

Hostutler, Ndiege, et al., 2001
Hostutler, D.A.; Ndiege, N.; Clouthier, D.J.; Pauls, S.W., Emission spectroscopy, harmonic vibrational frequencies, and improved ground state structures of jet-cooled monochloro- and monobromosilylene (HSiCl and HSiBr), J. Chem. Phys., 2001, 115, 12, 5485, https://doi.org/10.1063/1.1397795 . [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]

Tackett, Clouthier, et al., 2005
Tackett, B.S.; Clouthier, D.J.; Landry, J.N.; Jager, W., Fourier transform microwave spectroscopy of HSiBr: Exploring the Si--Br bond through quadrupole hyperfine coupling, J. Chem. Phys., 2005, 122, 21, 214314, https://doi.org/10.1063/1.1926284 . [all data]

Notes

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Data from NIST Standard Reference Database 69: NIST Chemistry WebBook
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