Stibino radical

Formula: H₂Sb
Molecular weight: 123.776
CAS Registry Number: 20346-77-4
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Other data available:
- Gas phase ion energetics data
Data at other public NIST sites:
- Gas Phase Kinetics Database
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Reaction thermochemistry data

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Data compiled by: José A. Martinho Simões

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Individual Reactions

H₃Sb (g) = (g) + H₂Sb (g)

By formula: H₃Sb (g) = H (g) + H₂Sb (g)

Quantity	Value	Units	Method	Reference	Comment
Δ_rH°	68.91 ± 0.50	kcal/mol	PIMS	Berkowitz, Ellison, et al., 1994	Value recommended in the critical survey Berkowitz, Ellison, et al., 1994.

Vibrational and/or electronic energy levels

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Data compiled by: Marilyn E. Jacox

State: A

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


T_o = 19438	gas	A-X	403	700	Basco and Yee, 1968
					Ni, Yu, et al., 1986

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


a₁	2	Bend	695 ± 3	gas	AB	Basco and Yee, 1968

State: X

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


a₁	1	SbH₂ s-stretch	1883.9	Ne	IR	Wang, Souter, et al., 2003
	1	SbH₂ s-stretch	1869.0	Ar	IR	Wang, Souter, et al., 2003
	1	SbH₂ s-stretch	1878	H₂	IR	Wang, Souter, et al., 2003
b₂	3	SbH₂ a-stretch	1879.0	Ne	IR	Wang, Souter, et al., 2003
	3	SbH₂ a-stretch	1863.7	Ar	IR	Wang, Souter, et al., 2003
	3	SbH₂ a-stretch	1869.7	H₂	IR	Wang, Souter, et al., 2003

Additional references: Jacox, 1994, page 23

Notes

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

References

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Berkowitz, Ellison, et al., 1994
Berkowitz, J.; Ellison, G.B.; Gutman, D., Three methods to measure RH bond energies, J. Phys. Chem., 1994, 98, 2744. [all data]

Basco and Yee, 1968
Basco, N.; Yee, K.K., Spectra of Antimony Hydride Radicals, Spectrosc. Lett., 1968, 1, 1, 13, https://doi.org/10.1080/00387016808049936 . [all data]

Ni, Yu, et al., 1986
Ni, T.; Yu, S.; Ma, X.; Kong, F., The UV laser photolysis of stibine, Chem. Phys. Lett., 1986, 128, 3, 270, https://doi.org/10.1016/0009-2614(86)80338-4 . [all data]

Wang, Souter, et al., 2003
Wang, X.; Souter, P.F.; Andrews, L., Infrared Spectra of Antimony and Bismuth Hydrides in Solid Matrixes, J. Phys. Chem. A, 2003, 107, 21, 4244, https://doi.org/10.1021/jp034379y . [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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Symbols used in this document:

Δ_rH° Enthalpy of reaction at standard conditions
Data from NIST Standard Reference Database 69: NIST Chemistry WebBook
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