Lithium, compound with potassium (1:1)

Formula: KLi
Molecular weight: 46.039
IUPAC Standard InChI: InChI=1S/K.Li
IUPAC Standard InChIKey: OBTSLRFPKIKXSZ-UHFFFAOYSA-N
CAS Registry Number: 12030-83-0
Chemical structure:
This structure is also available as a 2d Mol file
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Gas phase ion energetics data

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Data compiled as indicated in comments:
LBLHLM - Sharon G. Lias, John E. Bartmess, Joel F. Liebman, John L. Holmes, Rhoda D. Levin, and W. Gary Mallard
LLK - Sharon G. Lias, Rhoda D. Levin, and Sherif A. Kafafi

Ionization energy determinations

IE (eV)	Method	Reference	Comment
4.57 ± 0.04	PI	Kappes and Schumacher, 1985	LBLHLM
4.69 ± 0.10	EI	Zmbov, Wu, et al., 1977	LLK

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⁽³⁹⁾K
State	T_e	ω_e	B_e	r_e	Trans.	ν₀₀
B	(17578)	(130) H 1			(B ← X) (R)	17539 H
B	↳missing citation; Weizel and Kulp, 1930
X ¹Σ⁺	0	(207) H	(0.265) 2	(3.27) 2 3
X ¹Σ⁺	↳Dagdigian and Wharton, 1972

Notes

Fragment

Estimated constants for ⁷Li³⁹K Dagdigian and Wharton, 1972. See also Cavaliere, Ferrante, et al., 1975.

Mol. beam rf el. reson. 4

μ_el = (⁷Li³⁹K; v=0,J=1) = 3.4₅ D; also values of eqQ.

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]

Zmbov, Wu, et al., 1977
Zmbov, K.F.; Wu, C.H.; Ihle, H.R., A mass spectrometric study of heteronuclear diatomic alkali metal molecules. Dissociation energies ionization potentials of NaLi, KLi, NaK, J. Chem. Phys., 1977, 67, 4603. [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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