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tin selenide

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
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)Sn(80)Se
F (47850) (290)         F larrow X R (47830) H
missing citation
E 30738.9 196.6 H 0.77 1 -1.6E-3       E lrarrow X R 30671.6 H
Barrow and Vago, 1943; missing citation
D 27549.6 225.1 H 0.69        D lrarrow X R 27496.6 H
Walker, Straley, et al., 1938; missing citation; missing citation
A definitive analysis of the visible asborption bands (15800 - 23800 cm-1) is still lacking. At least three or four systems seem to be present with upper state frequenices of ~226 and 218 cm-1, but there is considerable disagreement concerning the assignments of the bands.
X 1Sigma+ 0 331.2 H 0.736  0.06499777 2 0.00017048 -1.3E-7 1.1E-8  2.325601 3  
Marino, Guerin, et al., 1974
Microwave sp. 4
Hoeft, 1966


1Vibrational levels observed to v=29; a short extrapolation yields a dissociation limit at 35470 cm-1 while the banded absorption seems to go over into a continuum at 36570 cm-1.
2Rotational constants for 120Sn80Se; see Hoeft, 1966 who gives similar data for 28 other isotopic molecules.
3IR spectrum 6
4muel(v=0) = 2.82 D Hoeft, Lovas, et al., 1969, from Stark effect of microwave spectra Hoeft, Lovas, et al., 1969.
5From thermochemical data (mass-spectrometry) Colin and Drowart, 1964, recalculated with D00(Se2) = 3.411 eV (see Se2 note a). Assuming dissociation into 3P1 + 3P1 at the dissociation limit of the E state [see 1 and Barrow, 1970] gives D00 = 4.08 eV.
6In argon matrix.


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

Barrow and Vago, 1943
Barrow, R.F.; Vago, E.E., The band spectrum of SnSe in emission, Proc. Phys. Soc. London, 1943, 55, 326. [all data]

Walker, Straley, et al., 1938
Walker, J.W.; Straley, J.W.; Smith, A.W., Band spectra of PbSe, SnSe and PbTe in absorption, Phys. Rev., 1938, 53, 140. [all data]

Marino, Guerin, et al., 1974
Marino, C.P.; Guerin, J.D.; Nixon, E.R., Infrared spectra of some matrix-isolated germanium, tin, and lead chalcogenides, J. Mol. Spectrosc., 1974, 51, 160. [all data]

Hoeft, 1966
Hoeft, J., Das Mikrowellenrotationsspektrum des SnSe, Z. Naturforsch. A, 1966, 21, 437. [all data]

Hoeft, Lovas, et al., 1969
Hoeft, J.; Lovas, F.J.; Tiemann, E.; Torring, T., Elektrisches Dipolomoment von SnSe und SnTe, Z. Naturforsch. A, 1969, 21, 1843. [all data]

Colin and Drowart, 1964
Colin, R.; Drowart, J., Thermodynamic study of tin selenide and tin telluride using a mass spectrometer, J. Chem. Soc. Faraday Trans., 1964, 60, 673. [all data]

Barrow, 1970
Barrow, In Rosen, 1970, 1970, 376. [all data]

Rosen, 1970
Rosen, B., International tables of selected constants. 17. Spectroscopic data relative to diatomic molecules, Pub. Pergamon Press, Oxford, 1970, 0. [all data]


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