lead selenide

Formula: PbSe
Molecular weight: 286.2
CAS Registry Number: 12069-00-0
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Other data available:
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Constants of diatomic molecules

Data compiled by: Klaus P. Huber and Gerhard H. Herzberg

Data collected through July, 1977

Symbols used in the table of constants
Symbol	Meaning
State	electronic state and / or symmetry symbol
T_e	minimum electronic energy (cm^-1)
ω_e	vibrational constant – first term (cm^-1)
ω_ex_e	vibrational constant – second term (cm^-1)
ω_ey_e	vibrational constant – third term (cm^-1)
B_e	rotational constant in equilibrium position (cm^-1)
α_e	rotational constant – first term (cm^-1)
γ_e	rotation-vibration interaction constant (cm^-1)
D_e	centrifugal distortion constant (cm^-1)
β_e	rotational constant – first term, centrifugal force (cm^-1)
r_e	internuclear distance (Å)
Trans.	observed transition(s) corresponding to electronic state
ν₀₀	position of 0-0 band (units noted in table)

Diatomic constants for ⁽²⁰⁸⁾Pb⁽⁸⁰⁾Se
State	T_e	ω_e	ω_ex_e	ω_ey_e	B_e	α_e	γ_e	D_e	β_e	r_e	Trans.	ν₀₀
F	45220.9	224.8 H	0.50								F ← X R	45194.5 H
F	↳Sharma, 1946; missing citation
D	28418.0	190.4 H	0.53	-0.004							D ↔ X R	28374.4 H
D	↳missing citation; Vago and Barrow, 1947
C	23315.7	183.0 H	0.25								C ← X R	23268.5 H
C	↳Walker, Straley, et al., 1938
B	21005.8	184.8 H	0.43								B ← X R	20959.4 H
B	↳Walker, Straley, et al., 1938
State	T_e	ω_e	ω_ex_e	ω_ey_e	B_e	α_e	γ_e	D_e	β_e	r_e	Trans.	ν₀₀
A	18716.8	166.9 H	0.14								A ← X 1 R	18661.5 H
A	↳Walker, Straley, et al., 1938
X ¹Σ⁺	0	277.6 2 H	0.51 2		0.05059953 3	0.00012993	-0.000000111	0.70E-8		2.402233 4
	↳Marino, Guerin, et al., 1974
	Rotation sp. 5
	↳Hoeft and Mann, 1966

Notes

Also observed as laser-excited emission in Ne matrices Teichman and Nixon, 1975.

Average of Walker, Straley, et al., 1938 and Barrow and Vago, 1944.

Rotational constants of ²⁰⁸Pb⁸⁰Se; data for fourteen other isotopic species Hoeft and Mann, 1966.

Vibration sp. 7

Dipole moment of ²⁰⁸Pb⁸⁰Se, μ_el(v=0) = -3.2₈ D Hoeft, Lovas, et al., 1970, from Stark effect measurements on microwave transitions.

Thermochemical value Uy and Drowart, 1969 [based on D₀⁰(Se₂) = 3.41 eV Uy and Drowart, 1969]. This value agrees well with D₀⁰ = 3.10 eV Vago and Barrow, 1947 derived from a dissociation limit at 2870 Å Vago and Barrow, 1947 if dissociated into ³P₁ + ³P₁ is assumed.

In Ar matrix at 12 K.

References

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Sharma, 1946
Sharma, D., Some new ultra-violet band systems of selenides and tellurides of tin and lead, Nature (London), 1946, 157, 663. [all data]

Vago and Barrow, 1947
Vago, E.E.; Barrow, R.F., Ultra-violet absorption band-systems of PbO, PbS, PbSe and PbTe, Proc. Phys. Soc. London, 1947, 59, 449. [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 and Mann, 1966
Hoeft, J.; Mann, K., Das Mikrowellenrotationsspektrum des PbSe, Z. Naturforsch. A, 1966, 21, 1884. [all data]

Teichman and Nixon, 1975
Teichman, R.A., III; Nixon, E.R., The A → X emission spectra of PbS and PbSe in neon matrices: enhanced emission from isotopes and matrix sites, J. Mol. Spectrosc., 1975, 57, 14. [all data]

Barrow and Vago, 1944
Barrow, R.F.; Vago, E.E., An emission band-system of PbSe, Proc. Phys. Soc. London, 1944, 56, 76. [all data]

Hoeft, Lovas, et al., 1970
Hoeft, J.; Lovas, F.J.; Tiemann, E.; Torring, T., Elektrisches Dipolmoment von GeSe, GeTe, PbSe und PbTe, Z. Naturforsch. A, 1970, 25, 539. [all data]

Uy and Drowart, 1969
Uy, O.M.; Drowart, J., Mass spectrometric determination of the dissociation energies of the molecules BiO, BiS, BiSe and BiTe, J. Chem. Soc. Faraday Trans., 1969, 65, 3221. [all data]

Notes

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Data from NIST Standard Reference Database 69: NIST Chemistry WebBook
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