Cyanomethyl radical
- Formula: C2H2N
- Molecular weight: 40.0440
- IUPAC Standard InChIKey: XSTKDMFTWATIQP-UHFFFAOYSA-N
- CAS Registry Number: 2932-82-3
- Chemical structure:
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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 as indicated in comments:
LL - Sharon G. Lias and Joel F. Liebman
RDSH - Henry M. Rosenstock, Keith Draxl, Bruce W. Steiner, and John T. Herron
B - John E. Bartmess
View reactions leading to C2H2N+ (ion structure unspecified)
Electron affinity determinations
EA (eV) | Method | Reference | Comment |
---|---|---|---|
1.530 ± 0.010 | LPES | Goebbert, Velarde, et al., 2010 | B |
1.543 ± 0.014 | LPES | Moran, Ellis, et al., 1987 | B |
1.59 ± 0.13 | D-EA | Bartmess, Scott, et al., 1979 | value altered from reference due to change in acidity scale; B |
1.5600 ± 0.0060 | LPD | Marks, Wetzel, et al., 1986 | B |
1.507 ± 0.018 | LPD | Zimmerman and Brauman, 1977 | B |
>1.60 ± 0.20 | EIAE | Tsuda, Yokohata, et al., 1971 | From MeCN. G3MP2B3 calculations indicate an EA of ca. 1.5 eV; B |
Ionization energy determinations
IE (eV) | Method | Reference | Comment |
---|---|---|---|
9.9 ± 0.1 | DER | Holmes, Lossing, et al., 1993 | LL |
10.0 | DER | Lias, Bartmess, et al., 1988 | LL |
10.9 ± 0.1 | EI | Pottie and Lossing, 1961 | RDSH |
10.3 ± 0.02 | EI | Holmes, Lossing, et al., 1993 | Vertical value; LL |
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.
Goebbert, Velarde, et al., 2010
Goebbert, D.J.; Velarde, L.; Khuseynov, D.; Sanov, A.,
C-H Bond Dissociation Energy of Malononitrile,
J. Phys. Chem. Lett., 2010, 1, 4, 792-795, https://doi.org/10.1021/jz900379t
. [all data]
Moran, Ellis, et al., 1987
Moran, S.; Ellis, H.B., Jr.; DeFrees, D.J.; McLean, A.D.; Ellison, G.B.,
Carbanion spectroscopy: CH2CN-,
J. Am. Chem. Soc., 1987, 109, 5996. [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]
Marks, Wetzel, et al., 1986
Marks, J.; Wetzel, D.M.; Comita, P.B.; Brauman, J.I.,
A dipole supported state in cyanomethyl anion, the conjugate base of acetonitrile. Rotational band assignments in the electron photodetachment spectrum of -CH2CN,
J. Chem. Phys., 1986, 84, 5284. [all data]
Zimmerman and Brauman, 1977
Zimmerman, A.H.; Brauman, J.I.,
Electron photodetachment from negative ions of C2v symmetry. Electron affinities of allyl and cyanomethyl radicals,
J. Am. Chem. Soc., 1977, 99, 3565. [all data]
Tsuda, Yokohata, et al., 1971
Tsuda, S.; Yokohata, A.; Umaba, T.,
Measurement of negative ions formed by electron impact. VIII. Ionization efficiency curves of negative ions from methyl and ethyl cyanides,
Bull. Chem. Soc. Jpn., 1971, 44, 1486. [all data]
Holmes, Lossing, et al., 1993
Holmes, J.L.; Lossing, F.P.; Mayer, P.M.,
The effects of methyl substitution on the structure and thermochemistry of the cyanomethyl radical and cation,
Chem. Phys. Lett., 1993, 212, 134. [all data]
Lias, Bartmess, et al., 1988
Lias, S.G.; Bartmess, J.E.; Liebman, J.F.; Holmes, J.L.; Levin, R.D.; Mallard, W.G.,
Gas-phase ion and neutral thermochemistry,
J. Phys. Chem. Ref. Data, Suppl. 1, 1988, 17, 1-861. [all data]
Pottie and Lossing, 1961
Pottie, R.F.; Lossing, F.P.,
Free radicals by mass spectrometry. XXV. Ionization potentials of cyanoalkyl radicals,
J. Am. Chem. Soc., 1961, 83, 4737. [all data]
Notes
Go To: Top, Gas phase ion energetics data, References
- Symbols used in this document:
EA Electron affinity - Data from NIST Standard Reference Database 69: NIST Chemistry WebBook
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