Cyanogen iodide

Formula: CIN
Molecular weight: 152.9219
IUPAC Standard InChI: InChI=1S/CIN/c2-1-3
IUPAC Standard InChIKey: WPBXOELOQKLBDF-UHFFFAOYSA-N
CAS Registry Number: 506-78-5
Chemical structure:
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Reaction thermochemistry data

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Data compiled by: Hussein Y. Afeefy, Joel F. Liebman, and Stephen E. Stein

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Individual Reactions

2 + Cyanogen iodide = + + CNO.Na

By formula: 2HNaO + CIN = INa + H₂O + CNO.Na

Quantity	Value	Units	Method	Reference	Comment
Δ_rH°	-193.9 ± 0.3	kJ/mol	Cm	Lord and Woolf, 1954	solid phase; Heat of hydrolysis

Gas phase ion energetics data

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Data compiled as indicated in comments:
RDSH - Henry M. Rosenstock, Keith Draxl, Bruce W. Steiner, and John T. Herron

Ionization energy determinations

IE (eV)	Method	Reference	Comment
10.870 ± 0.001	S	Myer and Samson, 1970	RDSH
10.91	PE	Lake and Thompson, 1970	RDSH
10.91 ± 0.02	PE	Heilbronner, Hornung, et al., 1970	RDSH
10.87 ± 0.02	PI	Dibeler and Liston, 1967	RDSH

Appearance energy determinations

Ion	AE (eV)	Other Products	Method	Reference	Comment
CI⁺	17.6 ± 0.3	N	EI	Herron and Dibeler, 1960	RDSH
CN⁺	18.1 ± 0.1	I	EI	Herron and Dibeler, 1960	RDSH
I⁺	13.62 ± 0.02	CN	PI	Dibeler and Liston, 1967	RDSH
I⁺	9.8 ± 0.1	CN^-	EI	Herron and Dibeler, 1960	RDSH

References

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Lord and Woolf, 1954
Lord, G.; Woolf, A.A., The cyanogen halides. Part III. Their heats of formation and free energies, J. Chem. Soc., 1954, 2546-2551. [all data]

Myer and Samson, 1970
Myer, J.A.; Samson, J.A.R., Vacuum-ultraviolet absorption cross sections of CO, HCI, and ICN between 1050 and 2100 A, J. Chem. Phys., 1970, 52, 266. [all data]

Lake and Thompson, 1970
Lake, R.F.; Thompson, H., The photoelectron spectra of some molecules containing the C N group, Proc. Roy. Soc. (London), 1970, A317, 187. [all data]

Heilbronner, Hornung, et al., 1970
Heilbronner, E.; Hornung, V.; Muszkat, K.A., Die Photoelektron-Spektren von Chlor-, Brom- und Jodcyan, Helv. Chim. Acta, 1970, 53, 347. [all data]

Dibeler and Liston, 1967
Dibeler, V.H.; Liston, S.K., Mass-spectrometric study of photoionization. VIII.Dicyanogen and the cyanogen halides, J. Chem. Phys., 1967, 47, 4548. [all data]

Herron and Dibeler, 1960
Herron, J.T.; Dibeler, V.H., Electron impact study of the cyanogen halides, J. Am. Chem. Soc., 1960, 82, 1555. [all data]

Notes

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Symbols used in this document:

AE Appearance energy

Δ_rH° Enthalpy of reaction at standard conditions
Data from NIST Standard Reference Database 69: NIST Chemistry WebBook
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AE	Appearance energy
Δ_rH°	Enthalpy of reaction at standard conditions