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Cyanogen

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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 evaluated as indicated in comments:
HL - Edward P. Hunter and Sharon G. Lias
L - Sharon G. Lias

Data compiled as indicated in comments:
MM - Michael M. Meot-Ner (Mautner)
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

Quantity Value Units Method Reference Comment
IE (evaluated)13.37 ± 0.01eVN/AN/AL
Quantity Value Units Method Reference Comment
Proton affinity (review)674.7kJ/molN/AHunter and Lias, 1998HL
Quantity Value Units Method Reference Comment
Gas basicity645.8kJ/molN/AHunter and Lias, 1998HL

Gas basicity at 298K

Gas basicity (review) (kJ/mol) Reference Comment
622.8Milligan, Fairley, et al., 1998T = 300K; «DELTA»G =-RTln(kf/kr) from ratio of rate coefficients; MM
621.7Milligan, Fairley, et al., 1998T = 300K; «DELTA»G =-RTln(kf/kr) from ratio of rate coefficients; MM
<642.Milligan, Fairley, et al., 1998Irreversible PT from C2N2 to C2H5+; MM

Ionization energy determinations

IE (eV) Method Reference Comment
13.5 ± 0.3EISmith, 1983LBLHLM
13.36 ± 0.01PIBaker and Turner, 1968RDSH
13.374 ± 0.008PIDibeler and Liston, 1967RDSH
13.5EIDorsch and Kallman, 1930RDSH
13.51PEAsbrink, Von Niessen, et al., 1980Vertical value; LLK

Appearance energy determinations

Ion AE (eV) Other Products MethodReferenceComment
C+22.5C+N2EIDorsch and Kallman, 1930RDSH
CN+20.9 ± 0.3CNEISmith, 1983LBLHLM
CN+20.4CNEIHaney and Franklin, 1968RDSH
CN+20.42 ± 0.02CNPIDibeler and Liston, 1967RDSH
CN+18.CNEIDorsch and Kallman, 1930RDSH
C2+18.0 ± 0.3N2EISmith, 1983LBLHLM
C2+17.46 ± 0.02N2PIDibeler and Liston, 1967RDSH
C2+17.N2EIDorsch and Kallman, 1930RDSH
C2N+18.84 ± 0.05NEIHarland and McIntosh, 1985LBLHLM
C2N+19.5 ± 0.3NEISmith, 1983LBLHLM
C2N+19.5 ± 0.1NEIDibeler, Reese, et al., 1961RDSH

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.

Hunter and Lias, 1998
Hunter, E.P.; Lias, S.G., Evaluated Gas Phase Basicities and Proton Affinities of Molecules: An Update, J. Phys. Chem. Ref. Data, 1998, 27, 3, 413-656, https://doi.org/10.1063/1.556018 . [all data]

Milligan, Fairley, et al., 1998
Milligan, D.B.; Fairley, D.A.; Meot-Ner (Mautner), M.; McEwan, M.J., Proton affinity of cyanogen and association reactions of C2N2H+ and C2N2CH3+, Int. J. Mass Spectrom., 1998, 180, 285. [all data]

Smith, 1983
Smith, O.I., Cross sections for formation of parent and fragment ions by electron impact from C2N2, Int. J. Mass Spectrom. Ion Processes, 1983, 54, 55. [all data]

Baker and Turner, 1968
Baker, C.; Turner, D.W., High resolution molecular photoelectron spectroscopy. III.Acetylenes and azaacetylenes, Proc. Roy. Soc. (London), 1968, A308, 19. [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]

Dorsch and Kallman, 1930
Dorsch, K.E.; Kallman, H., Uber die Ionisierung von Dicyan durch langsame Elektronen, Z. Phys., 1930, 60, 376. [all data]

Asbrink, Von Niessen, et al., 1980
Asbrink, L.; Von Niessen, W.; Bieri, G., 30.4-nm He(II) photoelectron spectra of organic molecules, J. Electron Spectrosc. Relat. Phenom., 1980, 21, 93. [all data]

Haney and Franklin, 1968
Haney, M.A.; Franklin, J.L., Correlation of excess energies of electron-impact dissociations with the translational energies of the products, J.Chem. Phys., 1968, 48, 4093. [all data]

Harland and McIntosh, 1985
Harland, P.W.; McIntosh, B.J., Enthalpies of formation for the isomeric ions HxCCN+ and HxCNC+ (x = 0-3) by monochromatic electron impact on C2N2, CH3CN and CH3NC., Int. J. Mass Spectrom. Ion Processes, 1985, 67, 29. [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]


Notes

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