2-Butanone, 3,3-dimethyl-

• Formula: C₆H₁₂O
• Molecular weight: 100.1589
• IUPAC Standard InChI: InChI=1S/C6H12O/c1-5(7)6(2,3)4/h1-4H3 Copy

  
• IUPAC Standard InChIKey: PJGSXYOJTGTZAV-UHFFFAOYSA-N Copy
• CAS Registry Number: 75-97-8
• 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: tert-Butyl methyl ketone; Methyl tert-butyl ketone; Pinacolin; Pinacoline; Pinacolone; 2,2-Dimethyl-3-butanone; 2,2-Dimethylbutanone; 3,3-Dimethyl-2-butanone; 3,3-Dimethylbutanone; tert-C4H9COCH3; Ketone, tert-butyl methyl; 1,1,1-Trimethylacetone; t-Butyl methyl ketone; Ketone, t-butyl methyl; Methyl t-butyl ketone; Pinakolin; 1,1-Dimethylethyl methyl ketone; 3,3-Dimethyl-butan-2-one; NSC 935
• Permanent link for this species. Use this link for bookmarking this species for future reference.
• Information on this page:
  • Condensed phase thermochemistry data
  • Reaction thermochemistry data
  • Gas phase ion energetics data
  • References
  • Notes
• Other data available:
  • Gas phase thermochemistry data
  • Phase change data
  • IR Spectrum
  • Mass spectrum (electron ionization)
  • UV/Visible spectrum
  • Gas Chromatography
• Data at other public NIST sites:
  • Gas Phase Kinetics Database
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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 as indicated in comments:
ALS - Hussein Y. Afeefy, Joel F. Liebman, and Stephen E. Stein
DH - Eugene S. Domalski and Elizabeth D. Hearing

Constant pressure heat capacity of liquid

Reaction 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:
B - John E. Bartmess
ALS - Hussein Y. Afeefy, Joel F. Liebman, and Stephen E. Stein

Note: Please consider using the reaction search for this species. This page allows searching of all reactions involving this species. A general reaction search form is also available. Future versions of this site may rely on reaction search pages in place of the enumerated reaction displays seen below.

Individual Reactions

C₆H₁₁O^- +  =

By formula: C₆H₁₁O^- + H⁺ = C₆H₁₂O

 +  = 2 + 

By formula: C₈H₁₈O₂ + H₂O = 2CH₄O + C₆H₁₂O

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
L - 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

Gas basicity at 298K

Ionization energy determinations

Appearance energy determinations

De-protonation reactions

C₆H₁₁O^- +  =

By formula: C₆H₁₁O^- + H⁺ = C₆H₁₂O

References

Go To: Top, Condensed phase thermochemistry data, Reaction thermochemistry data, Gas phase ion energetics data, Notes

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

Harrop, Head, et al., 1970
Harrop, D.; Head, A.J.; Lewis, G.B., Thermodynamic properties of organic oxygen compounds. 22. Enthalpies of combustion of some aliphatic ketones, J. Chem. Thermodyn., 1970, 2, 203-210. [all data]

Andon, Counsell, et al., 1970
Andon, R.J.L.; Counsell, J.F.; Lees, E.B.; Martin, J.F., Thermodynamic properties of organic oxygen compounds. Part XXIII. Low-temperature heat capacity and entropy of C₆, C₇, and C9 ketones, 1970, J. [all data]

Brinkman, Berger, et al., 1993
Brinkman, E.A.; Berger, S.; Marks, J.; Brauman, J.I., Molecular Rotation and the Observation of Dipole-Bound States of Anions, J. Chem. Phys., 1993, 99, 10, 7586, https://doi.org/10.1063/1.465688 . [all data]

Wiberg and Squires, 1979
Wiberg, K.B.; Squires, R.R., Thermodynamics of hydrolysis aliphatic ketals. An entropy component of steric effects, J. Am. Chem. Soc., 1979, 101, 5512-5515. [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]

Decouzon, Gal, et al., 1996
Decouzon, M.; Gal, J.E.; Herreros, M.; Marai, P.C.; Murrell, J.; Todd, J.F.J., On the Use of the Kinetic Method for the Determination of Proton Affinities by Fourier-Transfrom Ion Cyclotron Resonance Mass Spectrometry, Rapid. Comm. Mass Spectrom., 1996, 10, 242. [all data]

Dommrose and Grutzmacher, 1987
Dommrose, A.; Grutzmacher, H., Destablized carbenium ions: A-acetyl-a,a-dimethylmethyl cations, Int. J. Mass Spectrom. Ion Processes, 1987, 76, 95. [all data]

Hernandez, Masclet, et al., 1977
Hernandez, R.; Masclet, P.; Mouvier, G., Spectroscopie de photoelectrons d'aldehydes et de cetones aliphatiques, J. Electron Spectrosc. Relat. Phenom., 1977, 10, 333. [all data]

Mouvier and Hernandez, 1975
Mouvier, G.; Hernandez, R., Ionisation and appearance potentials of alkylketones, Org. Mass Spectrom., 1975, 10, 958. [all data]

Brown, 1975
Brown, R.S., A photoelectron investigation of acyl silanes: The photoelectron spectra of trimethylsilyl phenyl ketone and phenyl tert-butyl ketone, Can. J. Chem., 1975, 53, 2446. [all data]

Miller, Koch, et al., 1973
Miller, L.L.; Koch, V.R.; Koenig, T.; Tuttle, M., Photoelectron spectroscopy and the anodic fragmentation of adamantane derivatives, J. Am. Chem. Soc., 1973, 95, 5075. [all data]

Cocksey, Eland, et al., 1971
Cocksey, B.J.; Eland, J.H.D.; Danby, C.J., The effect of alkyl substitution on ionisation potential, J. Chem. Soc., 1971, (B), 790. [all data]

Watanabe, Nakayama, et al., 1962
Watanabe, K.; Nakayama, T.; Mottl, J., Ionization potentials of some molecules, J. Quant. Spectry. Radiative Transfer, 1962, 2, 369. [all data]

Vilesov, 1960
Vilesov, F.I., The photoionization of vapors of compounds whose molecules contain carbonyl groups, Dokl. Phys. Chem., 1960, 132, 521, In original 1332. [all data]

Tam, Yee, et al., 1974
Tam, W.-C.; Yee, D.; Brion, C.E., Photoelectron spectra of some aldehydes and ketones, J. Electron Spectrosc. Relat. Phenom., 1974, 4, 77. [all data]

Holmes and Lossing, 1984
Holmes, J.L.; Lossing, F.P., Heats of formation of organic radicals from appearance energies, Int. J. Mass Spectrom. Ion Processes, 1984, 58, 113. [all data]

Notes

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• Symbols used in this document:
  

  AE	Appearance energy
  Cp,liquid	Constant pressure heat capacity of liquid
  IE (evaluated)	Recommended ionization energy
  S°liquid	Entropy of liquid at standard conditions
  ΔcH°liquid	Enthalpy of combustion of liquid 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

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