Potassium anion
- Formula: K-
- Molecular weight: 39.0988
- CAS Registry Number: 19128-96-2
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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 compiled by: John E. Bartmess
Electron affinity of neutral species
| EAneutral (eV) | Method | Reference | Comment |
|---|---|---|---|
| 0.501463 | LPD | Andersson, Sandstrom, et al., 2000 | Given: 0.501459(12) eV |
| 0.501463 ± 0.000087 | LPD | Slater, Read, et al., 1978 |
Protonation reactions
K- + =
| Quantity | Value | Units | Method | Reference | Comment |
|---|---|---|---|---|---|
| ΔrH° | 1439.840 ± 0.042 | kJ/mol | D-EA | Andersson, Sandstrom, et al., 2000 | gas phase; Given: 0.501459(12) eV |
| Quantity | Value | Units | Method | Reference | Comment |
| ΔrG° | 1420.4 ± 1.3 | kJ/mol | H-TS | Andersson, Sandstrom, et al., 2000 | gas phase; Given: 0.501459(12) eV |
References
Go To: Top, 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.
Andersson, Sandstrom, et al., 2000
Andersson, K.T.; Sandstrom, J.; Kiyan, I.Y.; Hanstorp, D.; Pegg, D.J.,
Measurement of the electron affinity of potassium - art. no. 022503,
Phys. Rev. A, 2000, 62, 2, 22503, https://doi.org/10.1103/PhysRevA.62.022503
. [all data]
Slater, Read, et al., 1978
Slater, J.; Read, F.H.; Novick, S.E.; Lineberger, W.C.,
Alkali Negative Ions. III. Multichannel Photodetachment of Cs- and K-,
Phys. Rev. A, 1978, 17, 1, 201, https://doi.org/10.1103/PhysRevA.17.201
. [all data]
Notes
Go To: Top, Gas phase ion energetics data, References
- Symbols used in this document:
EAneutral Electron affinity of neutral species ΔrG° Free energy of reaction at standard conditions ΔrH° Enthalpy of reaction at standard conditions - Data from NIST Standard Reference Database 69: NIST Chemistry WebBook
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