Lithium, compound with rubidium (1:1)

Formula: LiRb
Molecular weight: 92.409
IUPAC Standard InChI: InChI=1S/Li.Rb.2H
IUPAC Standard InChIKey: YNYKTELJFBLFDK-UHFFFAOYSA-N
CAS Registry Number: 12031-70-8
Chemical structure:
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Gas phase ion energetics data

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Data compiled by: Sharon G. Lias, John E. Bartmess, Joel F. Liebman, John L. Holmes, Rhoda D. Levin, and W. Gary Mallard

Ionization energy determinations

IE (eV)	Method	Reference
4.3 ± 0.1	PI	Kappes and Schumacher, 1985

Constants of diatomic molecules

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

Data collected through January, 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 ⁽⁷⁾Li⁽⁸⁵⁾Rb
State	T_e	ω_e	Trans.	ν₀₀
B	(17552)	(81) H 1	B ← X 2	17500 H
B	↳Walter and Barratt, 1928; Weizel and Kulp, 1930
X ¹Σ⁺	0	(185) H 3
X ¹Σ⁺	↳Dagdigian and Wharton, 1972

Notes

Fragment 4

Dipole moment of ⁷Li⁸⁵Rb: μ_el(v=0) = 4.0₀ D Dagdigian and Wharton, 1972, calculated Dagdigian and Wharton, 1972 with B₀ = 0.2l8 Dagdigian and Wharton, 1972 estimated from Badger's rule [see, however, Cavaliere, Ferrante, et al., 1975]. Quadrupole coupling constants Dagdigian and Wharton, 1972.

Mol. beam re el. reson. 2

Only five bands, four of which have Δv=0.

References

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Kappes and Schumacher, 1985
Kappes, M.M.; Schumacher, E., Generation, spectroscopic and chemical characterization of metal clusters (M_x, x < 65), a progress report, Surf. Sci., 1985, 156, 1. [all data]

Walter and Barratt, 1928
Walter, J.M.; Barratt, S., The existence of intermetallic compounds in the vapour state. The spectra of the alkali metals, and of their alloys with each other, Proc. R. Soc. London A, 1928, 119, 257. [all data]

Weizel and Kulp, 1930
Weizel, W.; Kulp, M., Uber die bandensysteme der alkalidampfe, Ann. Phys. (Leipzig), 1930, 4, 971. [all data]

Dagdigian and Wharton, 1972
Dagdigian, P.J.; Wharton, L., Molecular beam electric deflection and resonance spectroscopy of the heteronuclear alkali dimers: ³⁹K⁷Li, Rb⁷Li, ³⁹K²³Na, Rb²³Na, and ¹³³Cs²³Na, J. Chem. Phys., 1972, 57, 1487. [all data]

Cavaliere, Ferrante, et al., 1975
Cavaliere, P.; Ferrante, G.; Lo Cascio, L., Interpolated values of spectroscopic constants of asymmetric alkali molecules and molecular ions, J. Chem. Phys., 1975, 62, 4753. [all data]

Notes

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Data from NIST Standard Reference Database 69: NIST Chemistry WebBook
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