Dimethyl ether
- Formula: C2H6O
- Molecular weight: 46.0684
- 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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Gas phase thermochemistry data
Go To: Top, IR Spectrum, Vibrational and/or electronic energy levels, Gas Chromatography, 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
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 |
IR Spectrum
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Data compiled by: Coblentz Society, Inc.
- GAS; DOW KBr FOREPRISM-GRATING; DIGITIZED BY NIST FROM HARD COPY (FROM TWO SEGMENTS)
2, 4 cm-1 resolution
Data compiled by: NIST Mass Spectrometry Data Center, William E. Wallace, director
Vibrational and/or electronic energy levels
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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: Takehiko Shimanouchi
Symmetry: C2ν Symmetry Number σ = 2
Sym. | No | Approximate | Selected Freq. | Infrared | Raman | Comments | ||||
---|---|---|---|---|---|---|---|---|---|---|
Species | type of mode | Value | Rating | Value | Phase | Value | Phase | |||
a1 | 1 | CH3 d-str | 2996 | B | 2996 S | gas | 2989 S | liq. | ||
a1 | 2 | CH3 s-str | 2817 | B | 2817 S | gas | 2815 VS p | liq. | ||
a1 | 3 | CH3 d-deform | 1464 | D | 1464 M | gas | ||||
a1 | 4 | CH3 s-deform | 1452 | D | 1452 M | gas | 1452 S dp | liq. | ||
a1 | 5 | CH3 rock | 1244 | B | 1244 W | gas | ||||
a1 | 6 | CO s-str | 928 | B | 928 S | gas | 922 S p | liq. | ||
a1 | 7 | COC deform | 418 | C | 418 M | gas | 428 M p | liq. | ||
a2 | 8 | CH3 d-str | 2952 | C | ia | 2952 S | liq. | |||
a2 | 9 | CH3 d-deform | 1464 | D | ia | SF(ν3) | ||||
a2 | 10 | CH3 rock | 1150 | C | ia | 1150 M d | liq. | |||
a2 | 11 | Torsion | 203 | E | ia | CF | ||||
b1 | 12 | CH3 d-str | 2996 | B | 2996 S | gas | 2989 S | liq. | OV(ν1) | |
b1 | 13 | CH3 s-str | 2817 | B | 2817 S | gas | 2815 VS p | liq. | OV(ν2) | |
b1 | 14 | CH3 d-deform | 1464 | D | 1464 M | gas | OV(ν3) | |||
b1 | 15 | CH3 s-deform | 1452 | D | 1452 M | gas | 1452 S dp | liq. | OV(ν4) | |
b1 | 16 | CH3 rock | 1227 | C | 1227 W | liq. | ||||
b1 | 17 | CO a-str | 1102 | B | 1102 VS | gas | 1104 M dp | liq. | ||
b2 | 18 | CH3 d-str | 2925 | B | 2925 S | gas | ||||
b2 | 19 | CH3 d-deform | 1464 | D | 1464 M | gas | OV(ν3) | |||
b2 | 20 | CH3 rock | 1179 | B | 1179 VS | gas | 1170 sh | liq. | ||
b2 | 21 | Torsion | 242 | C | 242 W | gas | ||||
Source: Shimanouchi, 1972
Notes
d | Photodissociation threshold |
VS | Very strong |
S | Strong |
M | Medium |
W | Weak |
ia | Inactive |
sh | Shoulder |
p | Polarized |
dp | Depolarized |
CF | Calculated frequency |
SF | Calculation shows that the frequency approximately equals that of the vibration indicated in the parentheses. |
OV | Overlapped by band indicated in parentheses. |
B | 1~3 cm-1 uncertainty |
C | 3~6 cm-1 uncertainty |
D | 6~15 cm-1 uncertainty |
E | 15~30 cm-1 uncertainty |
Gas Chromatography
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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: NIST Mass Spectrometry Data Center, William E. Wallace, director
Kovats' RI, non-polar column, isothermal
Column type | Active phase | Temperature (C) | I | Reference | Comment |
---|---|---|---|---|---|
Packed | Squalane | 50. | 323. | Becerra, Sánchez, et al., 1982 | N2, Chromosorb W-AM; Column length: 6. m |
Packed | Squalane | 50. | 325. | Becerra, Sánchez, et al., 1982 | N2, Chromosorb W-AM; Column length: 6. m |
Packed | Apiezon L | 120. | 324. | Bogoslovsky, Anvaer, et al., 1978 | Celite 545 |
Packed | Apiezon L | 160. | 331. | Bogoslovsky, Anvaer, et al., 1978 | Celite 545 |
Packed | Apiezon M | 130. | 323. | Golovnya and Garbuzov, 1974 | N2, Chromosorb W; Column length: 2.1 m |
Normal alkane RI, non-polar column, temperature ramp
Column type | Active phase | I | Reference | Comment |
---|---|---|---|---|
Capillary | OV-101 | 327. | Zenkevich, 2005 | 25. m/0.20 mm/0.10 μm, N2/He, 6. K/min; Tstart: 50. C; Tend: 250. C |
Normal alkane RI, non-polar column, custom temperature program
Column type | Active phase | I | Reference | Comment |
---|---|---|---|---|
Capillary | SE-30 | 350. | Vinogradov, 2004 | Program: not specified |
Capillary | SPB-1 | 328. | Flanagan, Streete, et al., 1997 | 60. m/0.53 mm/5. μm, He; Program: 40C(6min) => 5C/min => 80C => 10C/min => 200C |
Capillary | Polydimethyl siloxanes | 327. | Zenkevich and Chupalov, 1996 | Program: not specified |
Capillary | SPB-1 | 328. | Strete, Ruprah, et al., 1992 | 60. m/0.53 mm/5.0 μm, Helium; Program: 40 0C (6 min) 5 0C/min -> 80 0C 10 0C/min -> 200 0C |
Normal alkane RI, polar column, isothermal
Column type | Active phase | Temperature (C) | I | Reference | Comment |
---|---|---|---|---|---|
Capillary | Carbowax 20M | 60. | 478. | Sun, Siepmann, et al., 2006 | 30. m/0.25 mm/0.25 μm, Helium |
Capillary | Carbowax 20M | 80. | 481. | Sun, Siepmann, et al., 2006 | 30. m/0.25 mm/0.25 μm, Helium |
Normal alkane RI, polar column, custom temperature program
Column type | Active phase | I | Reference | Comment |
---|---|---|---|---|
Capillary | Carbowax 20M | 524. | Vinogradov, 2004 | Program: not specified |
References
Go To: Top, Gas phase thermochemistry data, IR Spectrum, Vibrational and/or electronic energy levels, Gas Chromatography, 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]
Shimanouchi, 1972
Shimanouchi, T.,
Tables of Molecular Vibrational Frequencies Consolidated Volume I, National Bureau of Standards, 1972, 1-160. [all data]
Becerra, Sánchez, et al., 1982
Becerra, M.R.; Sánchez, E.F.; Domínguez, J.A.G.; Muñoz, J.G.; Molera, M.J.,
The use of gaseous and liquid n-paraffins in GC identification of oxidation products of acetondimethyl acetal,
J. Chromatogr. Sci., 1982, 20, 8, 363-366, https://doi.org/10.1093/chromsci/20.8.363
. [all data]
Bogoslovsky, Anvaer, et al., 1978
Bogoslovsky, Yu.N.; Anvaer, B.I.; Vigdergauz, M.S.,
Chromatographic constants in gas chromatography (in Russian), Standards Publ. House, Moscow, 1978, 192. [all data]
Golovnya and Garbuzov, 1974
Golovnya, R.V.; Garbuzov, V.G.,
Effect of heteroatom in aliphatic sulfur- and oxygen-containing compounds on the values of the retention indices in gas chromatography,
Izv. Akad. Nauk SSSR Ser. Khim., 1974, 7, 1519-1521. [all data]
Zenkevich, 2005
Zenkevich, I.G.,
Experimentally measured retention indices., 2005. [all data]
Vinogradov, 2004
Vinogradov, B.A.,
Production, composition, properties and application of essential oils, 2004, retrieved from http://viness.narod.ru. [all data]
Flanagan, Streete, et al., 1997
Flanagan, R.J.; Streete, P.J.; Ramsey, J.D.,
Volatile Substance Abuse, UNODC Technical Series, No 5, United Nations, Office on Drugs and Crime, Vienna International Centre, PO Box 500, A-1400 Vienna, Austria, 1997, 56, retrieved from http://www.odccp.org/pdf/technicalseries1997-01-011.pdf. [all data]
Zenkevich and Chupalov, 1996
Zenkevich, I.G.; Chupalov, A.A.,
New Possibilities of Chromato Mass Pectrometric Identification of Organic Compounds Using Increments of Gas Chromatographic Retention Indices of Molecular Structural Fragments,
Zh. Org. Khim. (Rus.), 1996, 32, 5, 656-666. [all data]
Strete, Ruprah, et al., 1992
Strete, P.J.; Ruprah, M.; Ramsey, J.D.; Flanagan, R.J.,
Detection and identification of volatile substances by headspace capillary gas chromatography to aid the diagnosis of acute poisoning,
Analyst, 1992, 117, 7, 1111-1127, https://doi.org/10.1039/an9921701111
. [all data]
Sun, Siepmann, et al., 2006
Sun, L.; Siepmann, J.I.; Klotz, W.L.; Schure, M.R.,
retention in gas-liquid chromatography with a polyethylene oxide stationary phase: molecular simulation and experiment,
J. Chromatogr. A, 2006, 1126, 1-2, 373-380, https://doi.org/10.1016/j.chroma.2006.05.084
. [all data]
Notes
Go To: Top, Gas phase thermochemistry data, IR Spectrum, Vibrational and/or electronic energy levels, Gas Chromatography, 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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