HSn

Constants of diatomic molecules

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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: Klaus P. Huber and Gerhard H. Herzberg

Data collected through August, 1977

Symbols used in the table of constants
SymbolMeaning
State electronic state and / or symmetry symbol
Te minimum electronic energy (cm-1)
ωe vibrational constant – first term (cm-1)
ωexe vibrational constant – second term (cm-1)
ωeye vibrational constant – third term (cm-1)
Be rotational constant in equilibrium position (cm-1)
αe rotational constant – first term (cm-1)
γe rotation-vibration interaction constant (cm-1)
De centrifugal distortion constant (cm-1)
βe rotational constant – first term, centrifugal force (cm-1)
re internuclear distance (Å)
Trans. observed transition(s) corresponding to electronic state
ν00 position of 0-0 band (units noted in table)
Diatomic constants for (120)SnH
StateTeωeωexeωeyeBeαeγeDeβereTrans.ν00
A 2Δ 1    [4.904] 2 3   [433E-6] 4  [1.8546] A ↔ X R 23468.27 Z
↳Watson and Simon, 1939; missing citation
a 4Σ-     [5.3723] 5   [298E-6] 6  [1.7719] a ↔ X 7 R 15439.27 Z
↳Watson and Simon, 1940; missing citation
X 2Πr 0 8    [5.31488] 9   [207.5E-6]  [1.78146]  

Notes

1Spin coupling constants for v=0: A(v=0) = 20.41 Klynning, Lindgren, et al., 1965, AJ(v=0) = 0.0625 Klynning, Lindgren, et al., 1965, γ(v=0) = 1.23 Klynning, Lindgren, et al., 1965. For a more elaborate evaluation of these constants (including centrifugal distortion) see Kovacs and Vujisic, 1971.
2Rotational constants of Klynning, Lindgren, et al., 1965 based on a modified Hill-Van Vleck expression; see also Kovacs and Vujisic, 1971. A case "c" treatment of the same data is given by Veseth, 1973.
3Broadening of absorption lines above N' ~ 14 Klynning, Lindgren, et al., 1965, sharp cut-off in emission at N'=17 Watson and Simon, 1939.
4H0 = -2.3E-7; see 2.
5Spin splitting constants for v=0: λ(v=0) = 45.78 Klynning, Lindgren, et al., 1965, γ1(v=0) = 0.190 Klynning, Lindgren, et al., 1965, γ2(v=0) = 0.191 Klynning, Lindgren, et al., 1965. ΔB is the difference in B values between the states Ω = 1/2 and 3/2: ΔB = -0.0266 Klynning, Lindgren, et al., 1965. All constants derived by Klynning, Lindgren, et al., 1965 according to the modified expressions [see Klynning, Lindgren, et al., 1965 for the energy levels of a 4Σ state Hougen, 1962. For further refinements see Kovacs and Korwar, 1971, Kovacs and Pacher, 1971. The case "c" treatment of the same data by Veseth, 1973 gives B0 = 5.404, (Ω=1/2) Veseth, 1973 and B0 = 5.339, (Ω= 3/2) Veseth, 1973, respectively. For a discussion of 4Σ1/2- in terms of case "a'" coupling conditions see Kopp and Hougen, 1967.
6H0 = -3.3E-8.
7Rotational intensity distribution Klynning, 1966, Kopp and Hougen, 1967.
8A0 = +2178.88 + 0.01719J(J+1) Klynning, Lindgren, et al., 1965; see, however, Kovacs and Vujisic, 1971.
9Λ-type doubling Δ vfe(2Π1/2, v=0) = +1.003(J+1/2) - 1.76E-4(J+1/2)3 Klynning, Lindgren, et al., 1965.
10From the predissociation in A 2Δ assuming dissociation into 3P2 + 2S.
11Spin coupling constants for v=0: A(v=0)=8.52, AJ(v=0)= 0.0225, γ(v=0) = 0.555. The large difference from SnH remains unexplained; see Veseth, 1971, Veseth, 1973.
12H0 = -0.135E-7; see 2.
13Spin splitting constants for v=0: λ(v=0) = 45.0, γ1(v=0) = 0.076, γ2(v=0) = 0.0883. ΔB= -0.012 see 5.
14H0 = -0.13E-8.
15A0 = 2177.05 + 0.0080J(J+1).
16Δ vfe(2Π1/2,v=0) = +0.5076(J+1/2) - 0.000045(J+1/2)3.

References

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Data compilation copyright by the U.S. Secretary of Commerce on behalf of the U.S.A. All rights reserved.

Watson and Simon, 1939
Watson, W.W.; Simon, R., The spectrum of tin hydride at high pressure, Phys. Rev., 1939, 55, 358. [all data]

Watson and Simon, 1940
Watson, W.W.; Simon, R., Spectra of lead hydride and tin hydride in the near infra-red, Phys. Rev., 1940, 57, 708. [all data]

Klynning, Lindgren, et al., 1965
Klynning, L.; Lindgren, B.; Aslund, N., On the spectra of SnH and SnD, Ark. Fys., 1965, 30, 141. [all data]

Kovacs and Vujisic, 1971
Kovacs, I.; Vujisic, B., Centrifugal distortion of the spin-orbit and spin-rotation interaction for doublet terms, J. Phys. B:, 1971, 4, 1123. [all data]

Veseth, 1973
Veseth, L., Some anomalies in the electronic spectra of GeH, GeD, SnH, and SnD related to Hund's coupling case (c), J. Mol. Spectrosc., 1973, 48, 283. [all data]

Hougen, 1962
Hougen, J.T., The rotational energy levels of diatomic molecules in 4Σ electronic states, Can. J. Phys., 1962, 40, 598. [all data]

Kovacs and Korwar, 1971
Kovacs, I.; Korwar, V.M., General theory of the rotational structure of 4Σ states of diatomic molecules I, J. Phys. B:, 1971, 4, 759. [all data]

Kovacs and Pacher, 1971
Kovacs, I.; Pacher, P., General theory of the rotational structure of 4Σ states of diatomic molecules: II, J. Phys. B:, 1971, 4, 1633. [all data]

Kopp and Hougen, 1967
Kopp, I.; Hougen, J.T., Rotational energy levels of 1/2 states and intensities in 1/2-1/2 transitions: applications to some heavier hydrides, Can. J. Phys., 1967, 45, 2581. [all data]

Klynning, 1966
Klynning, L., On the intensity distribution in the 4Σ-2Π band of SnH, Ark. Fys., 1966, 31, 281. [all data]

Veseth, 1971
Veseth, L., Second-order spin-orbit splitting in 2Δ states of diatomic molecules, Physica (Amsterdam), 1971, 56, 286. [all data]

Notes

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