Dipotassium


Gas phase thermochemistry data

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Data compilation copyright by the U.S. Secretary of Commerce on behalf of the U.S.A. All rights reserved.

Quantity Value Units Method Reference Comment
Δfgas29.560kcal/molReviewChase, 1998Data last reviewed in December, 1983
Quantity Value Units Method Reference Comment
gas,1 bar59.682cal/mol*KReviewChase, 1998Data last reviewed in December, 1983

Gas Phase Heat Capacity (Shomate Equation)

Cp° = A + B*t + C*t2 + D*t3 + E/t2
H° − H°298.15= A*t + B*t2/2 + C*t3/3 + D*t4/4 − E/t + F − H
S° = A*ln(t) + B*t + C*t2/2 + D*t3/3 − E/(2*t2) + G
    Cp = heat capacity (cal/mol*K)
    H° = standard enthalpy (kcal/mol)
    S° = standard entropy (cal/mol*K)
    t = temperature (K) / 1000.

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Temperature (K) 298. to 1300.1300. to 6000.
A 5.4155817.412359
B 12.80000-1.382941
C -13.462400.276767
D 3.826100-0.018846
E 0.0835362.970591
F 27.7701032.06570
G 63.4530173.42949
H 29.5609929.56099
ReferenceChase, 1998Chase, 1998
Comment Data last reviewed in December, 1983 Data last reviewed in December, 1983

Reaction thermochemistry data

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Data compilation copyright by the U.S. Secretary of Commerce on behalf of the U.S.A. All rights reserved.

Data compiled by: Michael M. Meot-Ner (Mautner) and Sharon G. Lias

Note: Please consider using the reaction search for this species. This page allows searching of all reactions involving this species. A general reaction search form is also available. Future versions of this site may rely on reaction search pages in place of the enumerated reaction displays seen below.

Individual Reactions

K8+ + Dipotassium = (K8+ • Dipotassium)

By formula: K8+ + K2 = (K8+ • K2)

Quantity Value Units Method Reference Comment
Δr20.3kcal/molPDissBrechignac, Cahuzac, et al., 1990gas phase

K9+ + Dipotassium = (K9+ • Dipotassium)

By formula: K9+ + K2 = (K9+ • K2)

Quantity Value Units Method Reference Comment
Δr12.7kcal/molPDissBrechignac, Cahuzac, et al., 1990gas phase

K11+ + Dipotassium = (K11+ • Dipotassium)

By formula: K11+ + K2 = (K11+ • K2)

Quantity Value Units Method Reference Comment
Δr15.7kcal/molPDissBrechignac, Cahuzac, et al., 1990gas phase

K13+ + Dipotassium = (K13+ • Dipotassium)

By formula: K13+ + K2 = (K13+ • K2)

Quantity Value Units Method Reference Comment
Δr16.4kcal/molPDissBrechignac, Cahuzac, et al., 1990gas phase

K3+ + Dipotassium = (K3+ • Dipotassium)

By formula: K3+ + K2 = (K3+ • K2)

Quantity Value Units Method Reference Comment
Δr15.9kcal/molPDissBrechignac, Cahuzac, et al., 1990gas phase

K4+ + Dipotassium = (K4+ • Dipotassium)

By formula: K4+ + K2 = (K4+ • K2)

Quantity Value Units Method Reference Comment
Δr13.8kcal/molPDissBrechignac, Cahuzac, et al., 1990gas phase

K6+ + Dipotassium = (K6+ • Dipotassium)

By formula: K6+ + K2 = (K6+ • K2)

Quantity Value Units Method Reference Comment
Δr19.1kcal/molPDissBrechignac, Cahuzac, et al., 1990gas phase

K5+ + Dipotassium = (K5+ • Dipotassium)

By formula: K5+ + K2 = (K5+ • K2)

Quantity Value Units Method Reference Comment
Δr18.2kcal/molPDissBrechignac, Cahuzac, et al., 1990gas phase

K7+ + Dipotassium = (K7+ • Dipotassium)

By formula: K7+ + K2 = (K7+ • K2)

Quantity Value Units Method Reference Comment
Δr21.7kcal/molPDissBrechignac, Cahuzac, et al., 1990gas phase

K10+ + Dipotassium = (K10+ • Dipotassium)

By formula: K10+ + K2 = (K10+ • K2)

Quantity Value Units Method Reference Comment
Δr14.1kcal/molPDissBrechignac, Cahuzac, et al., 1990gas phase

K12+ + Dipotassium = (K12+ • Dipotassium)

By formula: K12+ + K2 = (K12+ • K2)

Quantity Value Units Method Reference Comment
Δr16.4kcal/molPDissBrechignac, Cahuzac, et al., 1990gas phase

Gas phase ion energetics data

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Data compilation copyright by the U.S. Secretary of Commerce on behalf of the U.S.A. All rights reserved.

Data evaluated as indicated in comments:
L - Sharon G. Lias

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
RDSH - Henry M. Rosenstock, Keith Draxl, Bruce W. Steiner, and John T. Herron
B - John E. Bartmess

Quantity Value Units Method Reference Comment
IE (evaluated)4.062 ± 0.0015eVN/AN/AL

Electron affinity determinations

EA (eV) Method Reference Comment
0.497 ± 0.012LPESEaton, Sarkas, et al., 1992Vertical Detachment Energy: 0.550±0.010 eV.; B
0.493 ± 0.012LPESMcHugh, Eaton, et al., 1989Vertical Detachment Energy: 0.550±0.010 eV; B

Ionization energy determinations

IE (eV) Method Reference Comment
4.0637 ± 0.0002PIKappes, Radi, et al., 1985LBLHLM
4.0637 ± 0.0003PIBroyer, Chevaleyre, et al., 1985LBLHLM
4.06075 ± 0.00015LSLeutwyler, Hofmann, et al., 1981LLK
4.059 ± 0.001LSHerrmann, Schumacher, et al., 1978LLK
4.0607 ± 0.0001PIHerrmann, Schumacher, et al., 1978LLK
4.05 ± 0.05PIHerrmann, Schumacher, et al., 1978LLK
4.059 ± 0.001PIHerrmann, Leutwyler, et al., 1978LLK
3.9EIZmbov, Wu, et al., 1977LLK
4.0 ± 0.1PIFoster, Leckenby, et al., 1969RDSH
~4.1SRobertson and Barrow, 1961RDSH

Appearance energy determinations

Ion AE (eV) Other Products MethodReferenceComment
K+4.85KPIHerrmann, Leutwyler, et al., 1978LLK

References

Go To: Top, Gas phase thermochemistry data, Reaction thermochemistry data, Gas phase ion energetics data, Notes

Data compilation copyright by the U.S. Secretary of Commerce on behalf of the U.S.A. All rights reserved.

Chase, 1998
Chase, M.W., Jr., NIST-JANAF Themochemical Tables, Fourth Edition, J. Phys. Chem. Ref. Data, Monograph 9, 1998, 1-1951. [all data]

Brechignac, Cahuzac, et al., 1990
Brechignac, C.; Cahuzac, P.; Carlier, F.; De Frutos, M.; Leyniger, J., Cohesive Energies of (K)n+ 5<n<200 from Photoevaporation Experiments, J. Chem. Phys., 1990, 93, 10, 7449, https://doi.org/10.1063/1.459418 . [all data]

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]

McHugh, Eaton, et al., 1989
McHugh, K.M.; Eaton, J.G.; Lee, G.H.; Sarkas, H.W.; Kidder, L.H.; Snodgrass, J.T.; Manaa, M.R.; Bowen, K.H., Photoelectron Spectra of the alkali metal cluster Anions: Na-,n=2-5, K-,n=2-7, Rb-,n=2-3, and Cs-,n=2-3, J. Chem. Phys., 1989, 91, 6, 3792, https://doi.org/10.1063/1.456861 . [all data]

Kappes, Radi, et al., 1985
Kappes, M.M.; Radi, P.; Schar, M.; Schumacher, E., Photoionization measurements on dialkali monohalides generated in supersonic nozzle beams, Chem. Phys. Lett., 1985, 113, 243. [all data]

Broyer, Chevaleyre, et al., 1985
Broyer, M.; Chevaleyre, J.; Delacretaz, G.; Fayet, P.; Woste, L., One- and two-photon ionization of alkaline clusters, Surf. Sci., 1985, 156, 342. [all data]

Leutwyler, Hofmann, et al., 1981
Leutwyler, S.; Hofmann, M.; Harri, H.-P.; Schumacher, E., The adiabatic ionization potentials of the alkali dimers Na2, NaK and K2, Chem. Phys. Lett., 1981, 77, 257. [all data]

Herrmann, Schumacher, et al., 1978
Herrmann, A.; Schumacher, E.; Woste, L., Preparation and photoionization potentials of molecules of sodium, potassium and mixed atoms, J. Chem. Phys., 1978, 68, 2327. [all data]

Herrmann, Leutwyler, et al., 1978
Herrmann, A.; Leutwyler, S.; Schumacher, E.; Woste, L., 38. On metal-atom clusters IV. Photoionization thresholds and multiphoton ionization spectra of alkali-metal molecules, Helv. Chim. Acta, 1978, 61, 453. [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]

Foster, Leckenby, et al., 1969
Foster, P.J.; Leckenby, R.E.; Robbins, E.J., The ionization potentials of clustered alkali metal atoms, J. Phys. B:, 1969, 2, 478. [all data]

Robertson and Barrow, 1961
Robertson, E.W.; Barrow, R.F., Rotational analysis oi the C1πu-X1+g system of K2, and the ionisation potential of K2, Proc. Chem. Soc., 1961, 329. [all data]


Notes

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