Ethane, 1,1,1-trimethoxy-
- Formula: C5H12O3
- Molecular weight: 120.1470
- IUPAC Standard InChI: InChI=1S/C5H12O3/c1-5(6-2,7-3)8-4/h1-4H3
- IUPAC Standard InChIKey: HDPNBNXLBDFELL-UHFFFAOYSA-N
- CAS Registry Number: 1445-45-0
- 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: Orthoacetic acid, trimethyl ester; Methyl orthoacetate; Trimethyl orthoacetate; 1,1,1-Trimethoxyethane; CH3C(OCH3)3
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Gas phase thermochemistry data
Go To: Top, Condensed 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: Hussein Y. Afeefy, Joel F. Liebman, and Stephen E. Stein
| Quantity | Value | Units | Method | Reference | Comment |
|---|---|---|---|---|---|
| ΔfH°gas | -570.86 ± 0.87 | kJ/mol | Cm | Wiberg and Squires, 1979 | Hydrolysis |
| ΔfH°gas | -572.7 ± 2.3 | kJ/mol | Cm | Hine and Klueppet, 1974 | Reanalyzed by Pedley, Naylor, et al., 1986, Original value = -571.5 kJ/mol |
Condensed phase thermochemistry 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: Hussein Y. Afeefy, Joel F. Liebman, and Stephen E. Stein
| Quantity | Value | Units | Method | Reference | Comment |
|---|---|---|---|---|---|
| ΔfH°liquid | -610.00 ± 0.45 | kJ/mol | Cm | Wiberg and Squires, 1979 | Hydrolysis |
| ΔfH°liquid | -612.0 ± 1.1 | kJ/mol | Cm | Hine and Klueppet, 1974 | Reanalyzed by Pedley, Naylor, et al., 1986, Original value = -610.9 kJ/mol |
Reaction thermochemistry data
Go To: Top, Gas phase thermochemistry data, 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 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: C5H12O3 + H2O = 2CH4O + C3H6O2
| Quantity | Value | Units | Method | Reference | Comment |
|---|---|---|---|---|---|
| ΔrH° | -26.89 ± 0.03 | kJ/mol | Cm | Wiberg, Martin, et al., 1985 | liquid phase; solvent: Aqueous dioxane |
| ΔrH° | -27.046 ± 0.030 | kJ/mol | Cm | Wiberg and Squires, 1979 | liquid phase; solvent: Water; Hydrolysis |
+
=
+ 2
By formula: C5H12O3 + H2O = C3H6O2 + 2CH4O
| Quantity | Value | Units | Method | Reference | Comment |
|---|---|---|---|---|---|
| ΔrH° | -26.3 ± 2.7 | kJ/mol | Cm | Hine and Klueppet, 1974 | liquid phase |
References
Go To: Top, Gas phase thermochemistry data, Condensed phase thermochemistry data, Reaction thermochemistry data, Notes
Data compilation copyright by the U.S. Secretary of Commerce on behalf of the U.S.A. All rights reserved.
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]
Hine and Klueppet, 1974
Hine, J.; Klueppet, A.W.,
Structural effects on rates and equilibria. XVIII. Thermodynamic stability of ortho esters,
J. Am. Chem. Soc., 1974, 96, 2924-2929. [all data]
Pedley, Naylor, et al., 1986
Pedley, J.B.; Naylor, R.D.; Kirby, S.P.,
Thermochemical Data of Organic Compounds, Chapman and Hall, New York, 1986, 1-792. [all data]
Wiberg, Martin, et al., 1985
Wiberg, K.B.; Martin, E.J.; Squires, R.R.,
Thermochemical studies of carbonyl compounds. 3. Enthalpies of hydrolysis of ortho esters,
J. Org. Chem., 1985, 50, 4717-4720. [all data]
Notes
Go To: Top, Gas phase thermochemistry data, Condensed phase thermochemistry data, Reaction thermochemistry data, References
- Symbols used in this document:
ΔfH°gas Enthalpy of formation of gas at standard conditions ΔfH°liquid Enthalpy of formation of liquid at standard conditions ΔrH° Enthalpy of reaction at standard conditions - Data from NIST Standard Reference Database 69: NIST Chemistry WebBook
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