Methyl isocyanide

• Formula: C₂H₃N
• Molecular weight: 41.0519
• IUPAC Standard InChI: InChI=1S/C2H3N/c1-3-2/h1H3 Copy

  
• IUPAC Standard InChIKey: ZRKSVHFXTRFQFL-UHFFFAOYSA-N Copy
• CAS Registry Number: 593-75-9
• Chemical structure:
  This structure is also available as a 2d Mol file
• Other names: Methane, isocyano-; Isocyanomethane; Methyl isonitrile; CH3NC
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• Information on this page:
  • Gas phase thermochemistry data
  • Condensed phase thermochemistry data
  • Phase change data
  • Gas phase ion energetics data
  • Mass spectrum (electron ionization)
  • Vibrational and/or electronic energy levels
  • Gas Chromatography
  • References
  • Notes
• Other data available:
  • Reaction thermochemistry data
• Data at other public NIST sites:
  • Gas Phase Kinetics Database
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Gas phase thermochemistry 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:
ALS - Hussein Y. Afeefy, Joel F. Liebman, and Stephen E. Stein
DRB - Donald R. Burgess, Jr.

Condensed phase thermochemistry 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: Hussein Y. Afeefy, Joel F. Liebman, and Stephen E. Stein

Phase change 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:
TRC - Thermodynamics Research Center, NIST Boulder Laboratories, Chris Muzny director
ALS - Hussein Y. Afeefy, Joel F. Liebman, and Stephen E. Stein
DRB - Donald R. Burgess, Jr.

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

Data compiled as indicated in comments:
B - John E. Bartmess
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

View reactions leading to C₂H₃N⁺ (ion structure unspecified)

Gas basicity at 298K

Ionization energy determinations

Appearance energy determinations

De-protonation reactions

C₂H₂N^- +  =

By formula: C₂H₂N^- + H⁺ = C₂H₃N

Mass spectrum (electron ionization)

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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: NIST Mass Spectrometry Data Center, William E. Wallace, director

Spectrum

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Additional Data

Vibrational and/or electronic energy levels

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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: Takehiko Shimanouchi

Symmetry:   C_3ν     Symmetry Number σ = 3

Source: Shimanouchi, 1972

Notes

Gas Chromatography

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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: NIST Mass Spectrometry Data Center, William E. Wallace, director

Normal alkane RI, polar column, temperature ramp

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Normal alkane RI, polar column, custom temperature program

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References

Go To: Top, Gas phase thermochemistry data, Condensed phase thermochemistry data, Phase change data, Gas phase ion energetics data, Mass spectrum (electron ionization), Vibrational and/or electronic energy levels, Gas Chromatography, Notes

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

Baghal-Vayjooee, Collister, et al., 1977
Baghal-Vayjooee, M.H.; Collister, J.L.; Pritchard, H.O., The enthalpy of isomerisation of methyl isocyanide, Can. J. Chem., 1977, 55, 2634-2636. [all data]

Pedley, Naylor, et al., 1986
Pedley, J.B.; Naylor, R.D.; Kirby, S.P., Thermochemical Data of Organic Compounds, Chapman and Hall, New York, 1986, 1-792. [all data]

Lemoult, 1906
Lemoult, P., Carbylamines et nitriles., Compt. Rend., 1906, 143, 902-904. [all data]

Lemoult and Jungfleisch, 1909
Lemoult, M.P.; Jungfleisch, M.E., Thermochimie. - Comparaisons entre les nitriles et les carbylamines, Compt. Rend., 1909, 148, 1602-1604. [all data]

Gautier, 1869
Gautier, A., Ann. Chim. Phys., 1869, 17, 103. [all data]

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]

Witt and Grutzmacher, 1997
Witt, M.; Grutzmacher, H.F., The gas phase basicity and proton affinity of propionamide: a comparison of methods, Int. J. Mass Spectrom. Ion. Processes, 1997, 164, 93. [all data]

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

Chess, Lapp, et al., 1982
Chess, E.K.; Lapp, R.L.; Gross, M.L., The question of tautomerism of alkylnitrile and isonitrile radical cations, Org. Mass Spectrom., 1982, 17, 475. [all data]

Bevan, Sandorfy, et al., 1981
Bevan, J.W.; Sandorfy, C.; Pang, F.; Bogg, J.E., The photoelectron spectrum of methylisocyanide-borane, Spectrochim. Acta A:, 1981, 37, 601. [all data]

Lake and Thompson, 1971
Lake, R.F.; Thompson, H.W., The photoelectron spectra of methyl isocyanide and trideuteromethyl isocyanide, Spectrochim. Acta, 1971, 27A, 783. [all data]

Heerma and deRidder, 1970
Heerma, W.; deRidder, J.J., The electron-impact induced fragmentation of some alkyl isocyanides and alpha-branched alkyl cyanides, Org. Mass Spectrom., 1970, 3, 1439. [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]

Matimba, Crabbendam, et al., 1992
Matimba, H.E.K.; Crabbendam, A.M.; Ingemann, S.; Nibbering, N.M.M., Gas-phase Bimolecular Chemistry of the .-CHNC and .-CHCN Radical Anions, Int. J. Mass Spectrom. Ion Proc., 1992, 114, 1-2, 85, https://doi.org/10.1016/0168-1176(92)85024-T . [all data]

Filley, DePuy, et al., 1987
Filley, J.; DePuy, C.H.; Bierbaum, V.M., Gas-Phase Negative Ion Chemistry of Methyl Isocyanide, J. Am. Chem. Soc., 1987, 109, 20, 5992, https://doi.org/10.1021/ja00254a017 . [all data]

Shimanouchi, 1972
Shimanouchi, T., Tables of Molecular Vibrational Frequencies Consolidated Volume I, National Bureau of Standards, 1972, 1-160. [all data]

Duque, Bonilla, et al., 2001
Duque, C.; Bonilla, A.; Bautista, E.; Zea, S., Exudation of low molecular wight compounds (thiobismethane, methyl isocyanide, amd methyl isothiocyanate) as a possible chemical defense mechanism in the marine sponge Ircinia felix, Biochem. Systematics Ecol., 2001, 29, 5, 459-467, https://doi.org/10.1016/S0305-1978(00)00081-8 . [all data]

Johanningsmeier and McFeeters, 2011
Johanningsmeier, S.D.; McFeeters, R.F., Detection of volatile spoilage metabolites in fermented cucumbers using nontargeted, comprehensive 2-dimensional gas chromatography-time-of-flight mass spectrometry (GCxGCxTOFMS), J. Food Sci., 2011, 76, 1, c168-c177, https://doi.org/10.1111/j.1750-3841.2010.01918.x . [all data]

Notes

Go To: Top, Gas phase thermochemistry data, Condensed phase thermochemistry data, Phase change data, Gas phase ion energetics data, Mass spectrum (electron ionization), Vibrational and/or electronic energy levels, Gas Chromatography, References

• Symbols used in this document:
  

  AE	Appearance energy
  Tfus	Fusion (melting) point
  ΔcH°liquid	Enthalpy of combustion of liquid at standard conditions
  ΔfH°gas	Enthalpy of formation of gas at standard conditions
  ΔfH°liquid	Enthalpy of formation of liquid at standard conditions
  ΔrG°	Free energy of reaction at standard conditions
  ΔrH°	Enthalpy of reaction at standard conditions
  ΔvapH°	Enthalpy of vaporization at standard conditions

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