2,4-Pentanedione, 3-methyl-

• Formula: C₆H₁₀O₂
• Molecular weight: 114.1424
• IUPAC Standard InChI: InChI=1S/C6H10O2/c1-4(5(2)7)6(3)8/h4H,1-3H3 Copy

  
• IUPAC Standard InChIKey: GSOHKPVFCOWKPU-UHFFFAOYSA-N Copy
• CAS Registry Number: 815-57-6
• 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: Methylacetylacetone; 3-Methyl-2,4-pentanedione; 3-Acetylbutan-2-one; 3-methylpentane-2,4-dione
• Permanent link for this species. Use this link for bookmarking this species for future reference.
• Information on this page:
  • Gas phase thermochemistry data
  • Condensed phase thermochemistry data
  • Phase change data
  • Gas phase ion energetics data
  • Gas Chromatography
  • References
  • Notes
• Other data available:
  • Mass spectrum (electron ionization)
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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

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:
BS - Robert L. Brown and Stephen E. Stein
TRC - Thermodynamics Research Center, NIST Boulder Laboratories, Chris Muzny director
ALS - 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 compiled by: Sharon G. Lias, Rhoda D. Levin, and Sherif A. Kafafi

Ionization energy determinations

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, non-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, Gas Chromatography, Notes

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

Conrath, Van de Sande, et al., 1974
Conrath, k.; Van de Sande, C.; Vandewalle, M., Studies in organic mass spectrometry. XVI. A combined approach to the structures of ions generated from the molecular ions of acyclic β-diketones through loss of small neutral molecules, Org. Mass Spectrom., 1974, 9, 585-593. [all data]

Ribeiro da Silva, Ferrao, et al., 1992
Ribeiro da Silva, M.A.V.; Ferrao, M.L.C.C.H.; Monte, M.J.S.; Esteves da Silva, R.M.G.; Ribeiro, J.C., Standard enthalpies of formation of 3-methylpentane-2,4-dione and of bis(3-methylpentane-2,4-dionato)copper(II): the mean (Cu-O) bond-dissociation enthalpy, J. Chem. Thermodyn., 1992, 24, 585-594. [all data]

Aldrich Chemical Company Inc., 1990
Aldrich Chemical Company Inc., Catalog Handbook of Fine Chemicals, Aldrich Chemical Company, Inc., Milwaukee WI, 1990, 1. [all data]

Sabatier and Mailhe, 1909
Sabatier, P.; Mailhe, A., New Applications of the General Method of Hydrogenation with Various Metals, Ann. Chim. Phys., 1909, 16, 70. [all data]

Sabatier and Mailhe, 1907
Sabatier, P.; Mailhe, A., The Direct Hydrogenation of Methyl Diketones, C. R. Hebd. Seances Acad. Sci., 1907, 144, 1086. [all data]

Schweig, Vermeer, et al., 1974
Schweig, A.; Vermeer, H.; Weidner, U., A photoelectron spectroscopic study of keto-enol tautomerism in acetylacetones - a new application of photoelectron spectroscopy, Chem. Phys. Lett., 1974, 26, 229. [all data]

Jordán, Margaría, et al., 2003
Jordán, M.J.; Margaría, C.A.; Shaw, P.E.; Goodner, K.L., Volatile components and aroma active compounds in aqueous essence and fresh pink guava fruid puree (Psidium guajava L.) by GC-MS and multidimensional GC/GC-O, J. Agric. Food Chem., 2003, 51, 5, 1421-1426, https://doi.org/10.1021/jf020765l . [all data]

Notes

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• Symbols used in this document:
  

  Tboil	Boiling 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
  ΔvapH°	Enthalpy of vaporization at standard conditions

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