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Cyano radical


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:
HL - Edward P. Hunter and Sharon G. Lias
L - Sharon G. Lias

Data compiled as indicated in comments:
B - John E. Bartmess
LLK - Sharon G. Lias, Rhoda D. Levin, and Sherif A. Kafafi
RDSH - Henry M. Rosenstock, Keith Draxl, Bruce W. Steiner, and John T. Herron

View reactions leading to CN+ (ion structure unspecified)

Quantity Value Units Method Reference Comment
IE (evaluated)13.598eVN/AN/AL
Quantity Value Units Method Reference Comment
Deltaf(+) ion1750. ± 4.kJ/molN/AN/A 

Electron affinity determinations

EA (eV) Method Reference Comment
3.8620 ± 0.0050LPESBradforth, Kim, et al., 1993B
3.835 ± 0.091D-EABartmess, Scott, et al., 1979value altered from reference due to change in acidity scale; B
3.820 ± 0.020PDBerkowitz, Chupka, et al., 1969B
5.64 ± 0.20R-ADeCorpo, Bafus, et al., 1971From MeCN; B
3.16124SIChamberlin, Page, et al., 1974The Magnetron method, lacking mass analysis, is not considered reliable.; B
2.78398SIPage, 1972The Magnetron method, lacking mass analysis, is not considered reliable.; B
2.800 ± 0.020SINapper and Page, 1963New DH(H-CN) used The Magnetron method, lacking mass analysis, is not considered reliable.; B

Ionization energy determinations

IE (eV) Method Reference Comment
14.17EVALHuber and Herzberg, 1979LLK
14.03 ± 0.02DERBerkowitz, Chupka, et al., 1969RDSH
<=14.20 ± 0.02DERDibeler and Liston, 1967RDSH
14.2 ± 0.3EIBerkowitz, 1962RDSH
14.5 ± 0.2EIDibeler, Reese, et al., 1961RDSH

Anion protonation reactions

CN- + Hydrogen cation = Hydrogen cyanide

By formula: CN- + H+ = CHN

Quantity Value Units Method Reference Comment
Deltar1464. ± 4.2kJ/molCIDTAkin and Ervin, 2006gas phase; B
Deltar1466.5 ± 0.71kJ/molD-EABradforth, Kim, et al., 1993gas phase; B
Deltar1469. ± 8.8kJ/molG+TSBartmess, Scott, et al., 1979gas phase; value altered from reference due to change in acidity scale; B
Quantity Value Units Method Reference Comment
Deltar1433. ± 4.6kJ/molH-TSAkin and Ervin, 2006gas phase; B
Deltar1435.8 ± 1.1kJ/molH-TSBradforth, Kim, et al., 1993gas phase; B
Deltar1438. ± 8.4kJ/molIMREBartmess, Scott, et al., 1979gas phase; value altered from reference due to change in acidity scale; B

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.

Bradforth, Kim, et al., 1993
Bradforth, S.E.; Kim, E.H.; Arnold, D.W.; Neumark, D.M., Photoelectron Spectroscopy of CN-, NCO-, and NCS-, J. Chem. Phys., 1993, 98, 2, 800, https://doi.org/10.1063/1.464244 . [all data]

Bartmess, Scott, et al., 1979
Bartmess, J.E.; Scott, J.A.; McIver, R.T., Jr., The gas phase acidity scale from methanol to phenol, J. Am. Chem. Soc., 1979, 101, 6047. [all data]

Berkowitz, Chupka, et al., 1969
Berkowitz, J.; Chupka, W.A.; Walter, T.A., Photoionization of HCN: the electron affinity and heat of formation of CN, J. Chem. Phys., 1969, 50, 1497. [all data]

DeCorpo, Bafus, et al., 1971
DeCorpo, J.J.; Bafus, D.A.; Franklin, J.L., Correlation of excess energies of dissociative electron attachment processes with the translational energies of their products, J. Chem. Phys., 1971, 54, 1592. [all data]

Chamberlin, Page, et al., 1974
Chamberlin, A.T.; Page, F.M.; Painter, M.R., A Study of the Negative Ions Produced during Surface Ionization on Hot Metal Filaments, Adv. Mass Spectrom., 1974, 6, 311. [all data]

Page, 1972
Page, F.M., Experimental determination of the electron affinities of inorganic radicals, Adv. Chem. Ser., 1972, 36, 68. [all data]

Napper and Page, 1963
Napper, R.; Page, F.M., Determination of Electron Affinities. Part 5. Cyanide and Thiocyanate Radicals, Trans. Farad. Soc., 1963, 59, 1086, https://doi.org/10.1039/tf9635901086 . [all data]

Huber and Herzberg, 1979
Huber, K.P.; Herzberg, G., Molecular Spectra and Molecular Structure. IV. Constants of Diatomic Molecules,, Van Nostrand Reinhold Co., 1979, ,1. [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]

Berkowitz, 1962
Berkowitz, J., Heat of formation of the CN radical, J. Chem. Phys., 1962, 36, 2533. [all data]

Dibeler, Reese, et al., 1961
Dibeler, V.H.; Reese, R.M.; Franklin, J.L., Mass spectrometric study of cyanogen and cyanoacetylenes, J. Am. Chem. Soc., 1961, 83, 1813. [all data]

Akin and Ervin, 2006
Akin, F.A.; Ervin, K.M., Collision-induced dissociation of HS-(HCN): Unsymmetrical hydrogen bonding in a proton-bound dimer anion, J. Phys. Chem. A, 2006, 110, 4, 1342-1349, https://doi.org/10.1021/jp0540454 . [all data]


Notes

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