3,5-Heptanedione, 2,6-dimethyl-
- Formula: C9H16O2
- Molecular weight: 156.2221
- IUPAC Standard InChIKey: CEGGECULKVTYMM-UHFFFAOYSA-N
- CAS Registry Number: 18362-64-6
- 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: 2,6-Dimethyl-3,5-heptanedione; 2,6-dimethylheptane-3,5-dione
- Permanent link for this species. Use this link for bookmarking this species for future reference.
- Information on this page:
- Other data available:
- Options:
Data at NIST subscription sites:
NIST subscription sites provide data under the NIST Standard Reference Data Program, but require an annual fee to access. The purpose of the fee is to recover costs associated with the development of data collections included in such sites. Your institution may already be a subscriber. Follow the links above to find out more about the data in these sites and their terms of usage.
Condensed phase thermochemistry data
Go To: Top, Phase change data, Reaction thermochemistry data, Mass spectrum (electron ionization), Gas Chromatography, References, Notes
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 |
---|---|---|---|---|---|
ΔfH°liquid | -526.8 ± 2.0 | kJ/mol | Ccb | Ferrao and Ribeiro Da Silva, 1981 | |
ΔfH°liquid | -527.3 ± 2.1 | kJ/mol | Ccb | Ferrao and Ribeiro Da Silva, 1981 | For enol form(95.8%) |
Quantity | Value | Units | Method | Reference | Comment |
ΔcH°liquid | -5301.4 ± 1.6 | kJ/mol | Ccb | Ferrao and Ribeiro Da Silva, 1981 | Corresponding ΔfHºliquid = -526.8 kJ/mol (simple calculation by NIST; no Washburn corrections) |
Phase change data
Go To: Top, Condensed phase thermochemistry data, Reaction thermochemistry data, Mass spectrum (electron ionization), Gas Chromatography, References, Notes
Data compilation copyright by the U.S. Secretary of Commerce on behalf of the U.S.A. All rights reserved.
Data compiled by: William E. Acree, Jr., James S. Chickos
Quantity | Value | Units | Method | Reference | Comment |
---|---|---|---|---|---|
ΔvapH° | 56.1 | kJ/mol | N/A | Ribeiro da Silva and Irving, 1978 |
Reaction thermochemistry data
Go To: Top, Condensed phase thermochemistry data, Phase change data, Mass spectrum (electron ionization), Gas Chromatography, References, Notes
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
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
By formula: C9H16O2 = C9H16O2
Quantity | Value | Units | Method | Reference | Comment |
---|---|---|---|---|---|
ΔrH° | -15. ± 0.8 | kJ/mol | Eqk | Calmon, 1969 | liquid phase; NMR |
Mass spectrum (electron ionization)
Go To: Top, Condensed phase thermochemistry data, Phase change data, Reaction thermochemistry data, Gas Chromatography, References, Notes
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
Notice: This spectrum may be better viewed with a Javascript and HTML 5 enabled browser.
Additional Data
View image of digitized spectrum (can be printed in landscape orientation).
Due to licensing restrictions, this spectrum cannot be downloaded.
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-IW-3848 |
NIST MS number | 236483 |
Gas Chromatography
Go To: Top, Condensed phase thermochemistry data, Phase change data, Reaction thermochemistry data, Mass spectrum (electron ionization), References, Notes
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
Kovats' RI, non-polar column, custom temperature program
Column type | Active phase | I | Reference | Comment |
---|---|---|---|---|
Capillary | HP-5 | 1120. | Sibanda, Chigwada, et al., 2004 | 30. m/0.25 mm/0.25 μm, He; Program: 40C(10min) => 3C/min => 200C => 2C/min => 220C |
Normal alkane RI, non-polar column, temperature ramp
Column type | Active phase | I | Reference | Comment |
---|---|---|---|---|
Capillary | DB-5 | 1076. | Smelcerovic, Spiteller, et al., 2007 | 30. m/0.25 mm/0.25 μm, He, 10. K/min, 320. C @ 4. min; Tstart: 60. C |
References
Go To: Top, Condensed phase thermochemistry data, Phase change data, Reaction thermochemistry data, Mass spectrum (electron ionization), Gas Chromatography, Notes
Data compilation copyright by the U.S. Secretary of Commerce on behalf of the U.S.A. All rights reserved.
Ferrao and Ribeiro Da Silva, 1981
Ferrao, M.L.C.C.H.; Ribeiro Da Silva, M.A.V.,
Enthalpies of combustion of four methyl-substituted heptane-3,5-diones and benzoylacetone,
J. Chem. Thermodyn., 1981, 13, 567-571. [all data]
Ribeiro da Silva and Irving, 1978
Ribeiro da Silva, M.A.V.; Irving, R.G.,
Rev. Port. Quim., 1978, 20, 36. [all data]
Calmon, 1969
Calmon, J.P.,
Thermodynamic functions of enolization of aliphatic β-diketones,
C. R. Acad. Sci. Paris, 1969, 268, 1435-1438. [all data]
Sibanda, Chigwada, et al., 2004
Sibanda, S.; Chigwada, G.; Poole, M.; Gwebu, E.T.; Noletto, J.A.; Schmidt, J.M.; Rea, A.I.; Setzer, W.N.,
Composition and bioactivity of the leaf essential oil of Heteropyxis dehniae from Zimbabwe,
J. Ethnopharmacol., 2004, 92, 1, 107-111, https://doi.org/10.1016/j.jep.2004.02.010
. [all data]
Smelcerovic, Spiteller, et al., 2007
Smelcerovic, A.; Spiteller, M.; Ligon, A.P.; Smelcerovic, Z.; Raabe, N.,
Essential oil composition of Hypericum L. species from Southeastern Serbia and their chemotaxonomy,
Biochem. Syst. Ecol., 2007, 35, 2, 99-113, https://doi.org/10.1016/j.bse.2006.09.012
. [all data]
Notes
Go To: Top, Condensed phase thermochemistry data, Phase change data, Reaction thermochemistry data, Mass spectrum (electron ionization), Gas Chromatography, References
- Symbols used in this document:
ΔcH°liquid Enthalpy of combustion of liquid at standard conditions ΔfH°liquid Enthalpy of formation of liquid at standard conditions ΔrH° Enthalpy of reaction at standard conditions ΔvapH° Enthalpy of vaporization at standard conditions - Data from NIST Standard Reference Database 69: NIST Chemistry WebBook
- The National Institute of Standards and Technology (NIST) uses its best efforts to deliver a high quality copy of the Database and to verify that the data contained therein have been selected on the basis of sound scientific judgment. However, NIST makes no warranties to that effect, and NIST shall not be liable for any damage that may result from errors or omissions in the Database.
- Customer support for NIST Standard Reference Data products.