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2-Pentanone

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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
RCD - Robert C. Dunbar

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

C5H9O- + Hydrogen cation = 2-Pentanone

By formula: C5H9O- + H+ = C5H10O

Quantity Value Units Method Reference Comment
Deltar1536. ± 8.8kJ/molTDEqBurkell, Fridgen, et al., 2003gas phase; B
Quantity Value Units Method Reference Comment
Deltar1505. ± 8.4kJ/molTDEqBurkell, Fridgen, et al., 2003gas phase; B

(CAS Reg. No. 117951-43-6 bullet 42949672952-Pentanone) + 2-Pentanone = CAS Reg. No. 117951-43-6

By formula: (CAS Reg. No. 117951-43-6 bullet 4294967295C5H10O) + C5H10O = CAS Reg. No. 117951-43-6

Quantity Value Units Method Reference Comment
Deltar167. ± 8.8kJ/molN/AHaas and Harrison, 1993gas phase; Both metastable and 50 eV collision energy.; B

2,2-Dimethoxypentane + Water = 2-Pentanone + 2Methyl Alcohol

By formula: C7H16O2 + H2O = C5H10O + 2CH4O

Quantity Value Units Method Reference Comment
Deltar19.52 ± 0.059kJ/molCmWiberg and Squires, 1979liquid phase; Heat of hydrolysis; ALS

Sodium ion (1+) + 2-Pentanone = (Sodium ion (1+) bullet 2-Pentanone)

By formula: Na+ + C5H10O = (Na+ bullet C5H10O)

Free energy of reaction

DeltarG° (kJ/mol) T (K) Method Reference Comment
104.298.IMREMcMahon and Ohanessian, 2000Anchor alanine=39.89; RCD

2-Pentanol = 2-Pentanone + Hydrogen

By formula: C5H12O = C5H10O + H2

Quantity Value Units Method Reference Comment
Deltar54.7 ± 0.3kJ/molEqkConnett, 1970liquid phase; ALS

References

Go To: Top, Reaction thermochemistry data, Notes

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

Burkell, Fridgen, et al., 2003
Burkell, J.L.; Fridgen, T.D.; McMahon, T.B., Gas-phase acidities and sites of deprotonation of 2-ketones and structures of the corresponding enolates, Int. J. Mass Spectrom., 2003, 227, 3, 497-508, https://doi.org/10.1016/S1387-3806(03)00102-7 . [all data]

Haas and Harrison, 1993
Haas, M.J.; Harrison, A.G., The Fragmentation of Proton-Bound Cluster Ions and the Gas-Phase Acidities of Alcohols, Int. J. Mass Spectrom. Ion Proc., 1993, 124, 2, 115, https://doi.org/10.1016/0168-1176(93)80003-W . [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]

McMahon and Ohanessian, 2000
McMahon, T.B.; Ohanessian, G., An Experimental and Ab Initio Study of the Nature of the Binding in Gas-Phase Complexes of Sodium Ions, Chem. Eur. J., 2000, 6, 16, 2931, https://doi.org/10.1002/1521-3765(20000818)6:16<2931::AID-CHEM2931>3.0.CO;2-7 . [all data]

Connett, 1970
Connett, J.E., Chemical equilibria. Part III. Dehydrogenation of pentan-1-ol, pentan-2-ol, and 3-methylbutan-2-ol, J. Chem. Soc. A, 1970, 1284-1286. [all data]


Notes

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