Propane, 2,2-dimethoxy-
- Formula: C5H12O2
- Molecular weight: 104.1476
- IUPAC Standard InChI: InChI=1S/C5H12O2/c1-5(2,6-3)7-4/h1-4H3
- IUPAC Standard InChIKey: HEWZVZIVELJPQZ-UHFFFAOYSA-N
- CAS Registry Number: 77-76-9
- Chemical structure:
This structure is also available as a 2d Mol file - Other names: Acetone, dimethyl acetal; Acetone dimethyl ketal; 2,2-Dimethoxypropane
- Permanent link for this species. Use this link for bookmarking this species for future reference.
- Information on this page:
- Other data available:
- Data at other public NIST sites:
- 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.
Gas phase thermochemistry data
Go To: Top, Reaction thermochemistry data, Gas phase ion energetics 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:
ALS - Hussein Y. Afeefy, Joel F. Liebman, and Stephen E. Stein
DRB - Donald R. Burgess, Jr.
| Quantity | Value | Units | Method | Reference | Comment |
|---|---|---|---|---|---|
| ΔfH°gas | -101.5 ± 0.3 | kcal/mol | Cm | Wiberg, Morgan, et al., 1994 | ALS |
| ΔfH°gas | -101.41 ± 0.23 | kcal/mol | Cm | Wiberg and Squires, 1979 | Hydrolysis; ALS |
| ΔfH°gas | -100.8 | kcal/mol | N/A | Stern and Dorer, 1962 | Value computed using ΔfHliquid° value of -457.1±1.0 kj/mol from Stern and Dorer, 1962 and ΔvapH° value of 35.2 kj/mol from Wiberg and Squires, 1979.; DRB |
Reaction thermochemistry data
Go To: Top, Gas phase thermochemistry data, Gas phase ion energetics 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
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
+
= 2
+
By formula: H2O + C5H12O2 = 2CH4O + C3H6O
| Quantity | Value | Units | Method | Reference | Comment |
|---|---|---|---|---|---|
| ΔrH° | 4.86 ± 0.01 | kcal/mol | Cm | Wiberg, Morgan, et al., 1994 | liquid phase |
| ΔrH° | 4.88 ± 0.01 | kcal/mol | Cm | Wiberg and Squires, 1979, 2 | liquid phase; Heat of hydrolysis |
| ΔrH° | 4.8836 ± 0.0067 | kcal/mol | Cm | Wiberg and Squires, 1979 | liquid phase; solvent: Water; Hydrolysis |
| ΔrH° | -3.95 ± 0.05 | kcal/mol | Cm | Stern and Dorer, 1962 | liquid phase; Reanalyzed by Cox and Pilcher, 1970, Original value = 3.69 ± 0.05 kcal/mol; Heat of hydrolysis |
2 +
=
+
By formula: 2CH4O + C3H6O = H2O + C5H12O2
| Quantity | Value | Units | Method | Reference | Comment |
|---|---|---|---|---|---|
| ΔrH° | -11.1 ± 0.3 | kcal/mol | Cm | Wiberg, Morgan, et al., 1994 | gas phase |
Gas phase ion energetics data
Go To: Top, Gas phase thermochemistry data, Reaction 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 by: Henry M. Rosenstock, Keith Draxl, Bruce W. Steiner, and John T. Herron
Appearance energy determinations
| Ion | AE (eV) | Other Products | Method | Reference | Comment |
|---|---|---|---|---|---|
| C4H9O+ | 10.28 ± 0.05 | CH3O | EI | Martin, Lampe, et al., 1966 |
References
Go To: Top, Gas phase thermochemistry data, Reaction thermochemistry data, Gas phase ion energetics data, Notes
Data compilation copyright by the U.S. Secretary of Commerce on behalf of the U.S.A. All rights reserved.
Wiberg, Morgan, et al., 1994
Wiberg, K.B.; Morgan, K.M.; Maltz, H.,
Thermochemistry of carbonyl reactions. 6. A study of hydration equilibria,
J. Am. Chem. Soc., 1994, 116, 11067-11077. [all data]
Wiberg and Squires, 1979
Wiberg, K.B.; Squires, R.R.,
A microprocessor-controlled system for precise measurement of temperature changes. Determination of the enthalpies of hydrolysis of some polyoxygenated hydrocarbons,
J. Chem. Thermodyn., 1979, 11, 773-786. [all data]
Stern and Dorer, 1962
Stern, J.H.; Dorer, F.H.,
Standard heats of formation of 2,2-Dimethoxypropane (1), and 2,2 -Diethoxypropane (1). Group additivity theory and calculated heats of formation and five ketals,
J. Phys. Chem., 1962, 66, 97-99. [all data]
Wiberg and Squires, 1979, 2
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]
Cox and Pilcher, 1970
Cox, J.D.; Pilcher, G.,
Thermochemistry of Organic and Organometallic Compounds, Academic Press, New York, 1970, 1-636. [all data]
Martin, Lampe, et al., 1966
Martin, R.H.; Lampe, F.W.; Taft, R.W.,
An electron-impact study of ionization and dissociation in methoxy- and halogen- substituted methanes,
J. Am. Chem. Soc., 1966, 88, 1353. [all data]
Notes
Go To: Top, Gas phase thermochemistry data, Reaction thermochemistry data, Gas phase ion energetics data, References
- Symbols used in this document:
AE Appearance energy ΔfH°gas Enthalpy of formation of gas at standard conditions ΔrH° Enthalpy of reaction 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.