Acetic acid, cyano-, methyl ester
- Formula: C4H5NO2
- Molecular weight: 99.0880
- IUPAC Standard InChIKey: ANGDWNBGPBMQHW-UHFFFAOYSA-N
- CAS Registry Number: 105-34-0
- Chemical structure:
This structure is also available as a 2d Mol file or as a computed 3d SD file
The 3d structure may be viewed using Java or Javascript. - Other names: Cyanoacetic acid methyl ester; Methyl cyanoacetate; Methyl cyanoethanoate; Methyl 2-cyanoacetate; USAF kf-22; Methylester kyseliny kyanoctove; Malonic methyl ester nitrile
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Gas phase ion energetics data
Go To: Top, Gas Chromatography, References, Notes
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:
B - John E. Bartmess
RDSH - Henry M. Rosenstock, Keith Draxl, Bruce W. Steiner, and John T. Herron
LL - Sharon G. Lias and Joel F. Liebman
Ionization energy determinations
IE (eV) | Method | Reference | Comment |
---|---|---|---|
10.87 ± 0.05 | EI | Pignataro, Foffani, et al., 1966 | RDSH |
Appearance energy determinations
Ion | AE (eV) | Other Products | Method | Reference | Comment |
---|---|---|---|---|---|
C2H3O2+ | 10.40 ± 0.02 | C2H2N | EI | Holmes, Lossing, et al., 1993 | LL |
C2H3O2+ | 11.72 ± 0.03 | ? | EI | Briggs and Shannon, 1969 | RDSH |
De-protonation reactions
C4H4NO2- + =
By formula: C4H4NO2- + H+ = C4H5NO2
Quantity | Value | Units | Method | Reference | Comment |
---|---|---|---|---|---|
ΔrH° | 1426. ± 8.8 | kJ/mol | G+TS | Mishima, Matsuoka, et al., 2004 | gas phase; Calc: keto form of acid more stable.; B |
ΔrH° | 1425. ± 8.8 | kJ/mol | G+TS | Taft, Abboud, et al., 1988 | gas phase; B |
Quantity | Value | Units | Method | Reference | Comment |
ΔrG° | 1400. ± 8.4 | kJ/mol | IMRE | Mishima, Matsuoka, et al., 2004 | gas phase; Calc: keto form of acid more stable.; B |
ΔrG° | 1399. ± 8.4 | kJ/mol | IMRE | Taft, Abboud, et al., 1988 | gas phase; B |
Gas Chromatography
Go To: Top, Gas phase ion energetics data, 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: NIST Mass Spectrometry Data Center, William E. Wallace, director
Normal alkane RI, non-polar column, temperature ramp
Column type | Active phase | I | Reference | Comment |
---|---|---|---|---|
Capillary | HP-5 | 900. | Jung, Wichmann, et al., 1999 | 25. m/0.20 mm/0.33 μm, 50. C @ 3. min, 5. K/min; Tend: 180. C |
References
Go To: Top, Gas phase ion energetics data, Gas Chromatography, Notes
Data compilation copyright by the U.S. Secretary of Commerce on behalf of the U.S.A. All rights reserved.
Pignataro, Foffani, et al., 1966
Pignataro, S.; Foffani, A.; Innorta, G.; Distefano, G.,
Molecular structural effects on the ionization potentials for metasubstituted aromatic compounds and for compounds of the type X-CH2-R,
Z. Physik. Chem. (Frankfurt), 1966, 49, 291. [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]
Briggs and Shannon, 1969
Briggs, P.R.; Shannon, T.W.,
The heat of formation of the methoxycarbonyl ion,
J. Am. Chem. Soc., 1969, 91, 4307. [all data]
Mishima, Matsuoka, et al., 2004
Mishima, M.; Matsuoka, M.; Lei, Y.X.; Rappoport, Z.,
Gas-phase acidities of disubstituted methanes and of enols of carboxamides substituted by electron-withdrawing groups,
J. Org. Chem., 2004, 69, 18, 5947-5965, https://doi.org/10.1021/jo040196b
. [all data]
Taft, Abboud, et al., 1988
Taft, R.W.; Abboud, J.L.M.; Anvia, F.; Berthelot, M.; Fujio, M.; Gal, J.-F.; Headley, A.D.; Henderson, W.G.,
Regarding the Inherent Dependence of Resonance Effects of Strongly Conjugated Substituents on Electron Demand,
J. Am. Chem. Soc., 1988, 110, 6, 1797, https://doi.org/10.1021/ja00214a023
. [all data]
Jung, Wichmann, et al., 1999
Jung, A.; Wichmann, K.-H.; Kolb, M.,
VOC emission of polymeric packaging materials,
LaborPraxis, 1999, 23, 9, 20-22. [all data]
Notes
Go To: Top, Gas phase ion energetics data, Gas Chromatography, References
- Symbols used in this document:
AE Appearance energy 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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