Home Symbol which looks like a small house Up Solid circle with an upward pointer in it

CH2=NO2 anion


Gas phase ion energetics data

Go To: Top, References, Notes

Data compilation copyright by the U.S. Secretary of Commerce on behalf of the U.S.A. All rights reserved.

Data compiled by: John E. Bartmess

Electron affinity of neutral species

EAneutral (eV) Method Reference Comment
2.475 ± 0.010LPESMetz, Cyr, et al., 1991 
2.55 ± 0.24D-EABartmess, Scott, et al., 1979value altered from reference due to change in acidity scale
<2.35996IMRBMacKay and Bohme, 1978EA: < NO2
0.499686EIAETsuda, Yokohata, et al., 1969From CH3NO2

Protonation reactions

CH2NO2- + Hydrogen cation = Methane, nitro-

By formula: CH2NO2- + H+ = CH3NO2

Quantity Value Units Method Reference Comment
Deltar358.0 ± 5.0kcal/molD-EAMetz, Cyr, et al., 1991gas phase
Deltar356.4 ± 2.2kcal/molG+TSBartmess, Scott, et al., 1979gas phase; value altered from reference due to change in acidity scale
Deltar357.4 ± 2.9kcal/molG+TSCumming and Kebarle, 1978gas phase
Quantity Value Units Method Reference Comment
Deltar349.7 ± 2.0kcal/molIMREBartmess, Scott, et al., 1979gas phase; value altered from reference due to change in acidity scale
Deltar350.7 ± 2.0kcal/molIMRECumming and Kebarle, 1978gas phase
Deltar350.7 ± 2.0kcal/molIMREMacKay and Bohme, 1978gas phase; EA: < NO2

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.

Metz, Cyr, et al., 1991
Metz, R.B.; Cyr, D.R.; Neumark, D.M., Study of the 2B1 and 2A2 States of CH2NO2 via Ultraviolet Photoelectron Spectroscopy of the CH2NO2- Anion, J. Phys. Chem., 1991, 95, 7, 2900, https://doi.org/10.1021/j100160a047 . [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]

MacKay and Bohme, 1978
MacKay, G.I.; Bohme, D.K., Proton-Transfer Reactions in Nitromethane at 297K, Int. J. Mass Spectrom. Ion Phys., 1978, 26, 4, 327, https://doi.org/10.1016/0020-7381(78)80052-7 . [all data]

Tsuda, Yokohata, et al., 1969
Tsuda, S.; Yokohata, A.; Kawai, M., Measurement of Negative Ions formed by Electron Impact. II. The Ionization Efficiency Curves of Negative Nitro, Oxygen Atoms, and Nitromethylene Ions from Nitroalkanes., Bull. Chem. Soc. Japan, 1969, 42, 3, 614, https://doi.org/10.1246/bcsj.42.614 . [all data]

Cumming and Kebarle, 1978
Cumming, J.B.; Kebarle, P., Summary of gas phase measurements involving acids AH. Entropy changes in proton transfer reactions involving negative ions. Bond dissociation energies D(A-H) and electron affinities EA(A), Can. J. Chem., 1978, 56, 1. [all data]


Notes

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