2-Pyrrolidinone, 1-methyl-

• Formula: C₅H₉NO
• Molecular weight: 99.1311
• IUPAC Standard InChI: InChI=1S/C5H9NO/c1-6-4-2-3-5(6)7/h2-4H2,1H3 Copy

  
• IUPAC Standard InChIKey: SECXISVLQFMRJM-UHFFFAOYSA-N Copy
• CAS Registry Number: 872-50-4
• 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: M-Pyrol; N-Methyl-α-pyrrolidinone; N-Methyl-α-pyrrolidone; N-Methyl-γ-butyrolactam; N-Methyl-2-pyrrolidinone; N-Methyl-2-pyrrolidone; N-Methylpyrrolidinone; N-Methylpyrrolidone; NMP; 1-Methyl-2-Pyrrolidinone; 1-Methyl-2-pyrrolidone; 1-Methyl-5-pyrrolidinone; 1-Methylpyrrolidinone; 2-Pyrrolidone, 1-methyl-; 1-Methylazacyclopentane-2-one; 1-Methylpyrrolidone; N-Methylpyrrolidone-(2); N-Methylpyrrolid-2-one; Methylpyrrolidone; 1-Methylazacyclopentan-2-one; Agsolex 1; N 0131; N-Methyl-gamma-butyrolactam; Micropure ultra; NSC 4594
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• Information on this page:
  • Gas phase thermochemistry data
  • Gas phase ion energetics data
  • IR Spectrum
  • References
  • Notes
• Other data available:
  • Condensed phase thermochemistry data
  • Phase change data
  • Mass spectrum (electron ionization)
  • UV/Visible spectrum
  • Gas Chromatography
• 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 by: Hussein Y. Afeefy, Joel F. Liebman, and Stephen E. Stein

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:
LBLHLM - Sharon G. Lias, John E. Bartmess, Joel F. Liebman, John L. Holmes, Rhoda D. Levin, and W. Gary Mallard

View reactions leading to C₅H₉NO⁺ (ion structure unspecified)

Ionization energy determinations

IR Spectrum

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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

Gas Phase Spectrum

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Additional Data

References

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

Steele, Chirico, et al., 1990
Steele, W.V.; Chirico, R.D.; Nguyen, A.; Hossenlopp, I.A.; Smith, N.K., Determination of ideal-gas enthalpies of formation for key compounds, Am. Inst. Chem. Eng. Symp. Ser. (AIChE Symp. Ser.), 1990, 138-154. [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]

Treschanke and Rademacher, 1985
Treschanke, L.; Rademacher, P., Electronic structure and conformational properties of the amide linkage, J. Mol. Struct., 1985, 122, 47. [all data]

Notes

Go To: Top, Gas phase thermochemistry data, Gas phase ion energetics data, IR Spectrum, References

• Symbols used in this document:
  

  ΔfH°gas

  Enthalpy of formation of gas at standard conditions

• Data from NIST Standard Reference Database 69: NIST Chemistry WebBook
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