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1,3-Cyclohexanedione, 5,5-dimethyl-

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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

Quantity Value Units Method Reference Comment
Deltafgas-383.6 ± 1.9kJ/molCcbPilcher, Parchment, et al., 1993 

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

Quantity Value Units Method Reference Comment
Deltafsolid-483.4 ± 1.6kJ/molCcbPilcher, Parchment, et al., 1993 
Quantity Value Units Method Reference Comment
Deltacsolid-4379.7 ± 1.2kJ/molCcbPilcher, Parchment, et al., 1993Corresponding «DELTA»fsolid = -483.4 kJ/mol (simple calculation by NIST; no Washburn corrections)

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, Kenneth Kroenlein director
ALS - Hussein Y. Afeefy, Joel F. Liebman, and Stephen E. Stein
AC - William E. Acree, Jr., James S. Chickos

Quantity Value Units Method Reference Comment
Tfus421.4KN/AWolfrom and Bobbitt, 1956Uncertainty assigned by TRC = 3. K; TRC
Quantity Value Units Method Reference Comment
Deltasub99.8 ± 1.1kJ/molVPilcher, Parchment, et al., 1993ALS
Deltasub99.8 ± 1.1kJ/molMEPilcher, Parchment, et al., 1993AC

In addition to the Thermodynamics Research Center (TRC) data available from this site, much more physical and chemical property data is available from the following TRC products:


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 by: John E. Bartmess

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

C8H11O2- + Hydrogen cation = 1,3-Cyclohexanedione, 5,5-dimethyl-

By formula: C8H11O2- + H+ = C8H12O2

Quantity Value Units Method Reference Comment
Deltar1418. ± 8.8kJ/molG+TSCumming and Kebarle, 1978gas phase; Acid: dimedone
Quantity Value Units Method Reference Comment
Deltar1385. ± 8.4kJ/molIMRECumming and Kebarle, 1978gas phase; Acid: dimedone

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 as indicated in comments:
B - John E. Bartmess
LLK - Sharon G. Lias, Rhoda D. Levin, and Sherif A. Kafafi

Ionization energy determinations

IE (eV) Method Reference Comment
9.28 ± 0.05PEHouk, Davis, et al., 1973LLK

De-protonation reactions

C8H11O2- + Hydrogen cation = 1,3-Cyclohexanedione, 5,5-dimethyl-

By formula: C8H11O2- + H+ = C8H12O2

Quantity Value Units Method Reference Comment
Deltar1418. ± 8.8kJ/molG+TSCumming and Kebarle, 1978gas phase; Acid: dimedone; B
Quantity Value Units Method Reference Comment
Deltar1385. ± 8.4kJ/molIMRECumming and Kebarle, 1978gas phase; Acid: dimedone; B

IR Spectrum

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Data compiled by: Coblentz Society, Inc.

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


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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Mass spectrum
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Additional Data

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Owner NIST Mass Spectrometry Data Center
Collection (C) 2014 copyright by the U.S. Secretary of Commerce
on behalf of the United States of America. All rights reserved.
Origin Japan AIST/NIMC Database- Spectrum MS-NW-1675
NIST MS number 229668

All mass spectra in this site (plus many more) are available from the NIST/EPA/NIH Mass Spectral Library. Please see the following for information about the library and its accompanying search program.


UV/Visible 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: Victor Talrose, Alexander N. Yermakov, Alexy A. Usov, Antonina A. Goncharova, Axlexander N. Leskin, Natalia A. Messineva, Natalia V. Trusova, Margarita V. Efimkina

Spectrum

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UVVis spectrum
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Additional Data

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Source Timmons, 1966
Owner INEP CP RAS, NIST OSRD
Collection (C) 2007 copyright by the U.S. Secretary of Commerce
on behalf of the United States of America. All rights reserved.
Origin INSTITUTE OF ENERGY PROBLEMS OF CHEMICAL PHYSICS, RAS
Source reference RAS UV No. 19945
Instrument Unicam SP 700
Melting point 147-149

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, temperature ramp

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Column type Active phase I Reference Comment
CapillaryUltra-11101.Okumura, 199125. m/0.32 mm/0.25 «mu»m, He, 3. K/min; Tstart: 80. C; Tend: 260. C

Normal alkane RI, non-polar column, custom temperature program

View large format table.

Column type Active phase I Reference Comment
CapillaryHP-51176.Ventanas, Estevez, et al., 200850. m/0.32 mm/1.05 «mu»m, Helium; Program: 40 0C (10 min) 5 0C/min -> 200 0C 15 0C/min -> 250 0C (10 min)

References

Go To: Top, Gas phase thermochemistry data, Condensed phase thermochemistry data, Phase change data, Reaction thermochemistry data, Gas phase ion energetics data, IR Spectrum, Mass spectrum (electron ionization), UV/Visible spectrum, Gas Chromatography, Notes

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

Pilcher, Parchment, et al., 1993
Pilcher, G.; Parchment, O.G.; Hillier, I.H.; Heatley, F.; Fletcher, D.; Ribeiro da Silva, M.A.V.; Ferrao, M.L.C.C.H.; Monte, J.S.; Jiye, F., Thermochemical and theoretical studies on cyclohexanediones, J. Phys. Chem., 1993, 97, 243-247. [all data]

Wolfrom and Bobbitt, 1956
Wolfrom, M.L.; Bobbitt, J.M., Periodate Oxidation of Cyclic 1,3-Diketones, J. Am. Chem. Soc., 1956, 78, 2489-93. [all data]

Cumming and Kebarle, 1978
Cumming, J.B.; Kebarle, P., Summary of gas phase measurements involving acids AH. Entropy changes in proton transfer reactions involving negative ions. Bond dissociation energies D(A-H) and electron affinities EA(A), Can. J. Chem., 1978, 56, 1. [all data]

Houk, Davis, et al., 1973
Houk, K.N.; Davis, L.P.; Newkome, G.R.; Duke, R.E., Jr.; Nauman, R.V., Photoelectron spectroscopy of cyclic «beta»-diketones their enolone tautomers, J. Am. Chem. Soc., 1973, 95, 8364. [all data]

Timmons, 1966
Timmons, C.J., UV atlas of organic compounds, 1966, 1, B5/3. [all data]

Okumura, 1991
Okumura, T., retention indices of environmental chemicals on methyl silicone capillary column, Journal of Environmental Chemistry (Japan), 1991, 1, 2, 333-358, https://doi.org/10.5985/jec.1.333 . [all data]

Ventanas, Estevez, et al., 2008
Ventanas, S.; Estevez, M.; Andres, A.I.; Ruiz, J., Analysis of volatile compounds of Iberian dry-cured loins with different intramuscular fat contents using SPME-DED, Meat Sci., 2008, 79, 1, 172-180, https://doi.org/10.1016/j.meatsci.2007.08.011 . [all data]


Notes

Go To: Top, Gas phase thermochemistry data, Condensed phase thermochemistry data, Phase change data, Reaction thermochemistry data, Gas phase ion energetics data, IR Spectrum, Mass spectrum (electron ionization), UV/Visible spectrum, Gas Chromatography, References