potassium iodide

Formula: IK
Molecular weight: 166.0028
IUPAC Standard InChI: InChI=1S/HI.K/h1H;/q;+1/p-1
IUPAC Standard InChIKey: NLKNQRATVPKPDG-UHFFFAOYSA-M
CAS Registry Number: 7681-11-0
Chemical structure:
This structure is also available as a 2d Mol file
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Gas phase ion energetics data

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

Electron affinity determinations

EA (eV)	Method	Reference	Comment
0.728 ± 0.010	LPES	Miller, Leopold, et al., 1986	B
0.50 ± 0.10	LPES	Yang, Bloomfield, et al., 1992	EA given is Vertical Detachment Energy. Adiabatic EA est as up to 1 eV smaller; B

Ionization energy determinations

IE (eV)	Method	Reference	Comment
7.5 ± 0.4	EI	Emons, Horlbeck, et al., 1982	LBLHLM
7.2 ± 0.1	PE	Potts and Price, 1977	LLK
7.2 ± 0.1	PE	Potts, Williams, et al., 1974	LLK
8.2 ± 0.3	EI	Platel, 1965	RDSH
7.4	PE	Goodman, Allen, et al., 1974	Vertical value; LLK

Appearance energy determinations

Ion	AE (eV)	Other Products	Method	Reference	Comment
I⁺	14.6 ± 0.3	K	EI	Platel, 1965	RDSH
K⁺	8.6 ± 0.3	I	EI	Platel, 1965	RDSH
K⁺	25.14 ± 0.04	I(^-)	PE	Potts and Price, 1977	Vertical value; LLK

References

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Miller, Leopold, et al., 1986
Miller, T.M.; Leopold, D.G.; Murray, K.K.; Lineberger, W.C., Electron Affinities of the Alkali Halides and the Structure of their Negative Ions, J. Chem. Phys., 1986, 85, 5, 2368, https://doi.org/10.1063/1.451091 . [all data]

Yang, Bloomfield, et al., 1992
Yang, Y.A.; Bloomfield, L.A.; Jin, C.; Wang, L.S.; Smalley, R.E., Ultraviolet Photoelectron Spectroscopy and Photofragmentation Studies of Excess Electrons in Potassium Iodide Cluster Anions, J. Chem. Phys., 1992, 96, 4, 2453, https://doi.org/10.1063/1.462049 . [all data]

Emons, Horlbeck, et al., 1982
Emons, H.-H.; Horlbeck, W.; Kiessling, D., Massenspektrometrische untersuchung der gasphase uber alkalimetalliodiden, Z. Anorg. Allg. Chem., 1982, 488, 212. [all data]

Potts and Price, 1977
Potts, A.W.; Price, W.C., Photoelectron studies of ionic materials using molecular beam techniques, Phys. Scr., 1977, 16, 191. [all data]

Potts, Williams, et al., 1974
Potts, A.W.; Williams, T.A.; Price, W.C., Photoelectron spectra and electronic structure of diatomic alkali halides, Proc. Roy. Soc. London A, 1974, 341, 147. [all data]

Platel, 1965
Platel, G., Mesures des potentials d'apparition des ions obtenus par impact electronique dans la phase vapeur des iodures alcalins et des melanges LiI-MI, J. Chim. Phys., 1965, 62, 1176. [all data]

Goodman, Allen, et al., 1974
Goodman, T.D.; Allen, J.D., Jr.; Cusachs, L.C.; Schweitzer, G.K., The photoelectron spectra of gaseous alkali halides, J. Electron Spectrosc. Relat. Phenom., 1974, 3, 289. [all data]

Notes

Go To: Top, Gas phase ion energetics data, References

Symbols used in this document:

AE Appearance energy

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