MeCH=NO2 anion
- Formula: C2H4NO2-
- Molecular weight: 74.0592
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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 by: John E. Bartmess
Electron affinity of neutral species
EAneutral (eV) | Method | Reference | Comment |
---|---|---|---|
2.13 ± 0.13 | D-EA | Bartmess, Scott, et al., 1979 | value altered from reference due to change in acidity scale |
Protonation reactions
By formula: C2H4NO2- + H+ = C2H5NO2
Quantity | Value | Units | Method | Reference | Comment |
---|---|---|---|---|---|
ΔrH° | 1489. ± 9.2 | kJ/mol | G+TS | Bartmess, Scott, et al., 1979 | gas phase; value altered from reference due to change in acidity scale |
ΔrH° | 1496. ± 12. | kJ/mol | G+TS | Cumming and Kebarle, 1978 | gas phase |
Quantity | Value | Units | Method | Reference | Comment |
ΔrG° | 1462. ± 8.4 | kJ/mol | IMRE | Bartmess, Scott, et al., 1979 | gas phase; value altered from reference due to change in acidity scale |
ΔrG° | 1469. ± 8.4 | kJ/mol | IMRE | Cumming and Kebarle, 1978 | gas phase |
Ion clustering 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 by: John E. Bartmess
Note: Please consider using the reaction search for this species. This page allows searching of all reactions involving this species. Searches may be limited to ion clustering reactions. A general reaction search form is also available.
Clustering reactions
C2H4NO2- + = C4H9N2O4-
By formula: C2H4NO2- + C2H5NO2 = C4H9N2O4-
Quantity | Value | Units | Method | Reference | Comment |
---|---|---|---|---|---|
ΔrH° | 67.8 ± 3.3 | kJ/mol | TDAs | Wincel, 2004 | gas phase |
Quantity | Value | Units | Method | Reference | Comment |
ΔrG° | 37.7 | kJ/mol | TDAs | Wincel, 2004 | gas phase |
References
Go To: Top, Gas phase ion energetics data, Ion clustering data, Notes
Data compilation copyright by the U.S. Secretary of Commerce on behalf of the U.S.A. All rights reserved.
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]
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]
Wincel, 2004
Wincel, H.,
Gas-phase clustering reactions of NO2-, C2H3NO2-, C2H4NO2-C2H5NO2- and C2H5NO4- with C2H5NO2,
Int. J. Mass Spectrom., 2004, 232, 2, 185-194, https://doi.org/10.1016/j.ijms.2004.01.003
. [all data]
Notes
Go To: Top, Gas phase ion energetics data, Ion clustering data, References
- Symbols used in this document:
EAneutral Electron affinity of neutral species ΔrG° Free energy of reaction at standard conditions ΔrH° Enthalpy of reaction at standard conditions - Data from NIST Standard Reference Database 69: NIST Chemistry WebBook
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