Potassium, compound with rubidium (1:1)

Formula: KRb
Molecular weight: 124.5661
IUPAC Standard InChI: InChI=1S/K.Rb.2H
IUPAC Standard InChIKey: WOKFLZOMQQQYRV-UHFFFAOYSA-N
CAS Registry Number: 12333-39-0
Chemical structure:
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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
B - John E. Bartmess

Electron affinity determinations

EA (eV)	Method	Reference	Comment
0.486 ± 0.020	LPES	Eaton, Sarkas, et al., 1992	Vertical Detachment Energy: 0.579±0.015 eV.; B

Ionization energy determinations

IE (eV)	Method	Reference	Comment
3.9 ± 0.1	PI	Kappes and Schumacher, 1985	LBLHLM

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 ⁽³⁹⁾K⁽⁸⁵⁾Rb
State	ω_e	r_e
Diffuse absorption band at 20160 cm^-1
↳Walter and Barratt, 1928
X ¹Σ⁺	(75.5) 1	(4.07) 1

Notes

Interpolated values based on the constants for K₂ and Rb₂ Cavaliere, Ferrante, et al., 1975.

References

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Eaton, Sarkas, et al., 1992
Eaton, J.G.; Sarkas, H.W.; Arnold, S.T.; Mchugh, K.M.; Bowen, K.H., Negative Ion Photoelectron Spectroscopy of the Heteronuclear Alkali-Metal Dimer and Trimer Anions - NaK-, KRb-, RbCS-, KCs-, Na2K-, and K2Cs, Chem. Phys. Lett., 1992, 193, 1-3, 141, https://doi.org/10.1016/0009-2614(92)85697-9 . [all data]

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]

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

Go To: Top, Gas phase ion energetics data, Constants of diatomic molecules, References

Symbols used in this document:

EA Electron affinity
Data from NIST Standard Reference Database 69: NIST Chemistry WebBook
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