3,5-Heptanedione, 2,2,6,6-tetramethyl-
- Formula: C11H20O2
- Molecular weight: 184.2753
- IUPAC Standard InChI: InChI=1S/C11H20O2/c1-10(2,3)8(12)7-9(13)11(4,5)6/h7H2,1-6H3
- IUPAC Standard InChIKey: YRAJNWYBUCUFBD-UHFFFAOYSA-N
- CAS Registry Number: 1118-71-4
- 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: Dipivaloylmethane; 2,2,6,6-Tetramethyl-3,5-heptanedione; (CH3)3CCOCH2COC(CH3)3; 2,2,6,6-Tetramethylheptane-3,5-dione; 2,2,6,6-Tetramethyl heptanedione
- 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, 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 | -587.7 ± 3.8 | kJ/mol | Ccb | Ferrao and Ribeiro Da Silva, 1981 | |
| ΔfH°liquid | -587.9 ± 3.9 | kJ/mol | Ccb | Ferrao and Ribeiro Da Silva, 1981 | For enol form(98.0%) |
| Quantity | Value | Units | Method | Reference | Comment |
| ΔcH°liquid | -6599.2 ± 3.5 | kJ/mol | Ccb | Ferrao and Ribeiro Da Silva, 1981 | Corresponding ΔfHºliquid = -587.7 kJ/mol (simple calculation by NIST; no Washburn corrections) |
Phase change data
Go To: Top, Condensed phase thermochemistry data, References, Notes
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
AC - William E. Acree, Jr., James S. Chickos
| Quantity | Value | Units | Method | Reference | Comment |
|---|---|---|---|---|---|
| ΔvapH° | 59.54 | kJ/mol | N/A | Majer and Svoboda, 1985 | |
| ΔvapH° | 59.5 | kJ/mol | N/A | Ribeiro da Silva and Irving, 1978 | AC |
Reduced pressure boiling point
| Tboil (K) | Pressure (bar) | Reference | Comment |
|---|---|---|---|
| 345.7 | 0.008 | Weast and Grasselli, 1989 | BS |
References
Go To: Top, Condensed phase thermochemistry data, Phase change data, 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]
Majer and Svoboda, 1985
Majer, V.; Svoboda, V.,
Enthalpies of Vaporization of Organic Compounds: A Critical Review and Data Compilation, Blackwell Scientific Publications, Oxford, 1985, 300. [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]
Weast and Grasselli, 1989
CRC Handbook of Data on Organic Compounds, 2nd Editon, Weast,R.C and Grasselli, J.G., ed(s)., CRC Press, Inc., Boca Raton, FL, 1989, 1. [all data]
Notes
Go To: Top, Condensed phase thermochemistry data, Phase change data, References
- Symbols used in this document:
Tboil Boiling point ΔcH°liquid Enthalpy of combustion of liquid 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
- 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.