2,3-Butanediol, 2,3-dimethyl-
- Formula: C6H14O2
- Molecular weight: 118.1742
- IUPAC Standard InChIKey: IVDFJHOHABJVEH-UHFFFAOYSA-N
- CAS Registry Number: 76-09-5
- 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: Pinacol; Tetramethylethylene glycol; 2,3-Dimethyl-2,3-butanediol; meso-2,3-Dimethyl-2,3-butanediol; 2,3-Dihydroxy-2,3-dimethylbutane; 2,3-Dimethyl-2,3-dihydroxybutane
- 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.
Phase change data
Go To: Top, 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
TRC - Thermodynamics Research Center, NIST Boulder Laboratories, Chris Muzny director
ALS - Hussein Y. Afeefy, Joel F. Liebman, and Stephen E. Stein
DRB - Donald R. Burgess, Jr.
AC - William E. Acree, Jr., James S. Chickos
Quantity | Value | Units | Method | Reference | Comment |
---|---|---|---|---|---|
Tboil | 449. ± 20. | K | AVG | N/A | Average of 9 values; Individual data points |
Quantity | Value | Units | Method | Reference | Comment |
Tfus | 316.48 | K | N/A | Priest, Woolley, et al., 1983 | Uncertainty assigned by TRC = 0.05 K; TRC |
Tfus | 314.25 | K | N/A | Mellan, 1962 | Uncertainty assigned by TRC = 1. K; TRC |
Quantity | Value | Units | Method | Reference | Comment |
ΔvapH° | 15.8 ± 1.0 | kcal/mol | E | Guthrie, 1977 | Hydrolysis; ALS |
ΔvapH° | 15.8 | kcal/mol | N/A | Guthrie, 1977 | DRB |
Reduced pressure boiling point
Tboil (K) | Pressure (atm) | Reference | Comment |
---|---|---|---|
444.7 | 0.972 | Aldrich Chemical Company Inc., 1990 | BS |
Enthalpy of vaporization
ΔvapH (kcal/mol) | Temperature (K) | Method | Reference | Comment |
---|---|---|---|---|
14.1 | 361. | A | Stephenson and Malanowski, 1987 | Based on data from 346. to 448. K.; AC |
Enthalpy of fusion
ΔfusH (kcal/mol) | Temperature (K) | Method | Reference | Comment |
---|---|---|---|---|
3.51 | 316.2 | DSC | Priest, Woolley, et al., 1983, 2 | AC |
References
Go To: Top, Phase change data, Notes
Data compilation copyright by the U.S. Secretary of Commerce on behalf of the U.S.A. All rights reserved.
Priest, Woolley, et al., 1983
Priest, J.G.; Woolley, E.M.; Ott, J.B.; Goates, J.R.,
Solid+liquid phase equilibria, excess enthalpies, and enthalpies of fusion fusion in 2,3-dimethyl-2,3-butanediol + water.,
J. Chem. Thermodyn., 1983, 15, 357-66. [all data]
Mellan, 1962
Mellan, I.,
Polyhydric Alcohols, Spartan Books: Washington, DC, 1962. [all data]
Guthrie, 1977
Guthrie, J.P.,
Cyclization of glycol monoesters to give hemiorthoesters: a test of the thermochemical method for determining free energies of tetrahedral intermediates,
Can. J. Chem., 1977, 55, 3562-3574. [all data]
Aldrich Chemical Company Inc., 1990
Aldrich Chemical Company Inc.,
Catalog Handbook of Fine Chemicals, Aldrich Chemical Company, Inc., Milwaukee WI, 1990, 1. [all data]
Stephenson and Malanowski, 1987
Stephenson, Richard M.; Malanowski, Stanislaw,
Handbook of the Thermodynamics of Organic Compounds, 1987, https://doi.org/10.1007/978-94-009-3173-2
. [all data]
Priest, Woolley, et al., 1983, 2
Priest, Jeffrey G.; Woolley, Earl M.; Ott, J. Bevan; Goates, J. Rex,
Solid + liquid phase equilibria, excess enthalpies, and enthalpies of fusion in (2,3-dimethyl-2,3-butanediol + water),
The Journal of Chemical Thermodynamics, 1983, 15, 4, 357-366, https://doi.org/10.1016/0021-9614(83)90065-4
. [all data]
Notes
Go To: Top, Phase change data, References
- Symbols used in this document:
Tboil Boiling point Tfus Fusion (melting) point ΔfusH Enthalpy of fusion ΔvapH Enthalpy of vaporization 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.