germanium selenide

Formula: GeSe
Molecular weight: 151.60
CAS Registry Number: 12065-10-0
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Constants of diatomic molecules

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

Data collected through September, 1976

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 ⁷⁴Ge⁸⁰Se
State	T_e	ω_e	ω_ex_e	B_e	α_e	D_e	β_e	r_e	Trans.	ν₀₀
E	35462.6	217.7 H	1.02 1						E ← X R	35367 H
E	↳missing citation
A ¹Π	30845.7	269.4 H	0.89						A ↔ X R	30776.2 H
A ¹Π	↳missing citation; missing citation
X ¹Σ⁺	0	408.7 H	1.36	.096340508	0.00028904 2	2.2071E-₈ 3	1.9E-11	2.134629 4 5
	↳Marino, Guerin, et al., 1974
								6
	↳Hoeft, 1966; Stieda, Tiemann, et al., 1976

Notes

Long progression of absorption bands converging at 42360 cm^-1. The vibrational constants represent the levels only to v'=14.

α_v= -3.4E-8 (v+1/2)² -1.1E-9(v+1/2)³.

missing note

From the effective B_e. According to Stieda, Tiemann, et al., 1976 the minimum of the Born-Oppenheimer potential curve is at 2.134603 Å.

IR sp. 8

Microwave sp. 9

From the convergence of the E-X, v"=0 progression assuming dissociation into ³P + ³P. Since the particular triplet components involved are uncertain the possible error is rather large, viz. ± 0.25 eV.

In low-temperature argon and nitrogen matrices.

μ_el(v=0)= 1.64₈ D Hoeft, Lovas, et al., 1970 from Stark effect of microwave spectrum Hoeft, Lovas, et al., 1970. Hyperfine structure for odd isotopes Hoeft, Lovas, et al., 1970, 2.

References

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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 GeSe, Z. Naturforsch. A, 1966, 21, 1240. [all data]

Stieda, Tiemann, et al., 1976
Stieda, W.U.; Tiemann, E.; Torring, T.; Hoeft, J., Adiabatische Korrektur der Born-Oppenheimer-Naherung beim GeS und GeSe, Z. Naturforsch. A, 1976, 31, 374. [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]

Hoeft, Lovas, et al., 1970, 2
Hoeft, J.; Lovas, J.; Tiemann, E.; Torring, T., Dipole moments and hyperfine structure of the group IV/VI diatomic molecules, J. Chem. Phys., 1970, 53, 2736. [all data]

Notes

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Data from NIST Standard Reference Database 69: NIST Chemistry WebBook
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