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
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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 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 | -425. ± 1. | kJ/mol | Cm | Wiberg, Morgan, et al., 1994 | ALS |
| ΔfH°gas | -424.31 ± 0.98 | kJ/mol | Cm | Wiberg and Squires, 1979 | Hydrolysis; ALS |
| ΔfH°gas | -421.9 | kJ/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
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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
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° | 20.3 ± 0.04 | kJ/mol | Cm | Wiberg, Morgan, et al., 1994 | liquid phase |
| ΔrH° | 20.43 ± 0.04 | kJ/mol | Cm | Wiberg and Squires, 1979, 2 | liquid phase; Heat of hydrolysis |
| ΔrH° | 20.433 ± 0.028 | kJ/mol | Cm | Wiberg and Squires, 1979 | liquid phase; solvent: Water; Hydrolysis |
| ΔrH° | -16.5 ± 0.2 | kJ/mol | Cm | Stern and Dorer, 1962 | liquid phase; Reanalyzed by Cox and Pilcher, 1970, Original value = 15.4 ± 0.2 kJ/mol; Heat of hydrolysis |
2 +
=
+
By formula: 2CH4O + C3H6O = H2O + C5H12O2
| Quantity | Value | Units | Method | Reference | Comment |
|---|---|---|---|---|---|
| ΔrH° | -46. ± 1. | kJ/mol | Cm | Wiberg, Morgan, et al., 1994 | gas phase |
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 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
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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
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