Dimethyl ether
- Formula: C2H6O
- Molecular weight: 46.0684
- IUPAC Standard InChI: InChI=1S/C2H6O/c1-3-2/h1-2H3
- IUPAC Standard InChIKey: LCGLNKUTAGEVQW-UHFFFAOYSA-N
- CAS Registry Number: 115-10-6
- 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. - Isotopologues:
- Other names: Methane, oxybis-; Methyl ether; Methoxymethane; Wood ether; Oxybismethane; (CH3)2O; Ether, dimethyl; Ether, methyl; UN 1033; Dimethyl oxide; Dymel A; Dymel; Demeon D; DME; Methane, 1,1'-oxybis-
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- Information on this page:
- Other data available:
- Condensed phase thermochemistry data
- Phase change data
- Reaction thermochemistry data: reactions 1 to 50, reactions 51 to 52
- Henry's Law data
- Gas phase ion energetics data
- Ion clustering data
- IR Spectrum
- Mass spectrum (electron ionization)
- Vibrational and/or electronic energy levels
- Gas Chromatography
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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
GT - Glushko Thermocenter, Russian Academy of Sciences, Moscow
| Quantity | Value | Units | Method | Reference | Comment |
|---|---|---|---|---|---|
| ΔfH°gas | -184.1 ± 0.50 | kJ/mol | Ccb | Pilcher, Pell, et al., 1964 | ALS |
| Quantity | Value | Units | Method | Reference | Comment |
| ΔcH°gas | -1460.4 ± 0.46 | kJ/mol | Ccb | Pilcher, Pell, et al., 1964 | Corresponding ΔfHºgas = -184.1 kJ/mol (simple calculation by NIST; no Washburn corrections); ALS |
Constant pressure heat capacity of gas
| Cp,gas (J/mol*K) | Temperature (K) | Reference | Comment |
|---|---|---|---|
| 42.27 | 100. | Chao J., 1986 | p=1 bar. Selected values are in close agreement with other statistically calculated values [ Handi M.A., 1954, Seha Z., 1955, Banerjee S.C., 1964, Stull D.R., 1969] and ab initio result [ East A.L.L., 1997] at low temperatures. Discrepancies in S(1000 K) and Cp(1000 K) amount to about 5 and 3 J/mol*K, respectively, for [ Handi M.A., 1954, Banerjee S.C., 1964, Stull D.R., 1969].; GT |
| 48.99 | 150. | ||
| 54.47 | 200. | ||
| 62.56 | 273.15 | ||
| 65.57 ± 0.08 | 298.15 | ||
| 65.80 | 300. | ||
| 78.68 | 400. | ||
| 91.36 | 500. | ||
| 102.86 | 600. | ||
| 113.03 | 700. | ||
| 121.99 | 800. | ||
| 129.84 | 900. | ||
| 136.70 | 1000. | ||
| 142.69 | 1100. | ||
| 147.89 | 1200. | ||
| 152.41 | 1300. | ||
| 156.35 | 1400. | ||
| 159.77 | 1500. | ||
| 166.57 | 1750. | ||
| 171.50 | 2000. | ||
| 175.15 | 2250. | ||
| 177.91 | 2500. | ||
| 180.03 | 2750. | ||
| 181.70 | 3000. |
Constant pressure heat capacity of gas
| Cp,gas (J/mol*K) | Temperature (K) | Reference | Comment |
|---|---|---|---|
| 62.01 | 272.20 | Kistiakowsky G.B., 1940 | GT |
| 65.90 | 300.76 | ||
| 70.33 | 333.25 | ||
| 75.14 | 370.42 |
References
Go To: Top, Gas phase thermochemistry data, Notes
Data compilation copyright by the U.S. Secretary of Commerce on behalf of the U.S.A. All rights reserved.
Pilcher, Pell, et al., 1964
Pilcher, G.; Pell, A.S.; Coleman, D.J.,
Measurements of heats of combustion by flame calorimetry. Part 2-Dimethyl ether, methyl ethyl ether, methyl n-propyl ether, methyl isopropyl ether,
Trans. Faraday Soc., 1964, 60, 499-505. [all data]
Chao J., 1986
Chao J.,
Thermodynamic properties of key organic oxygen compounds in the carbon range C1 to C4. Part 2. Ideal gas properties,
J. Phys. Chem. Ref. Data, 1986, 15, 1369-1436. [all data]
Handi M.A., 1954
Handi M.A.,
Molecular spectroscopy. Determination and interpretation of fundamental frequencies of dimethyl ether from infrared absorption spectrum; application for thermodynamic functions calculation,
Compt. Rend. Acad. Sci., 1954, 239, 349-351. [all data]
Seha Z., 1955
Seha Z.,
Thermodynamic functions of dimethyl ether,
Chem. Listy, 1955, 49, 1569-1570. [all data]
Banerjee S.C., 1964
Banerjee S.C.,
Thermodynamic properties of organic compounds. Part 1. Normal symmetrical aliphatic ethers,
Brit. Chem. Eng., 1964, 9, 311-313. [all data]
Stull D.R., 1969
Stull D.R., Jr.,
The Chemical Thermodynamics of Organic Compounds. Wiley, New York, 1969. [all data]
East A.L.L., 1997
East A.L.L.,
Ab initio statistical thermodynamical models for the computation of third-law entropies,
J. Chem. Phys., 1997, 106, 6655-6674. [all data]
Kistiakowsky G.B., 1940
Kistiakowsky G.B.,
Gaseous heat capacities. III,
J. Chem. Phys., 1940, 8, 618-622. [all data]
Notes
Go To: Top, Gas phase thermochemistry data, References
- Symbols used in this document:
Cp,gas Constant pressure heat capacity of gas ΔcH°gas Enthalpy of combustion of gas at standard conditions ΔfH°gas Enthalpy of formation of gas at standard conditions - Data from NIST Standard Reference Database 69: NIST Chemistry WebBook
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