Dimethyl ether

• Formula: C₂H₆O
• Molecular weight: 46.0684
• IUPAC Standard InChI: InChI=1S/C2H6O/c1-3-2/h1-2H3 Copy

  
• IUPAC Standard InChIKey: LCGLNKUTAGEVQW-UHFFFAOYSA-N Copy
• 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:
  • (CD3)2O
• 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-
• Permanent link for this species. Use this link for bookmarking this species for future reference.
• Information on this page:
  • Gas phase thermochemistry data
  • Condensed phase thermochemistry data
  • Phase change data
  • Henry's Law data
  • Gas phase ion energetics data
  • Ion clustering data
  • Mass spectrum (electron ionization)
  • References
  • Notes
• Other data available:
  • Reaction thermochemistry data: reactions 1 to 50, reactions 51 to 52
  • IR Spectrum
  • Vibrational and/or electronic energy levels
  • Gas Chromatography
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  • Gas Phase Kinetics Database
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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

Constant pressure heat capacity of gas

Constant pressure heat capacity of gas

Condensed 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 by: Eugene S. Domalski and Elizabeth D. Hearing

Constant pressure heat capacity of liquid

Phase change 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:
BS - Robert L. Brown and Stephen E. Stein
TRC - Thermodynamics Research Center, NIST Boulder Laboratories, Chris Muzny director
AC - William E. Acree, Jr., James S. Chickos
DH - Eugene S. Domalski and Elizabeth D. Hearing

Enthalpy of vaporization

Entropy of vaporization

Antoine Equation Parameters

log₁₀(P) = A − (B / (T + C))
    P = vapor pressure (bar)
    T = temperature (K)

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Enthalpy of fusion

Entropy of fusion

Henry's Law 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: Rolf Sander

Henry's Law constant (water solution)

k_H(T) = k°_H exp(d(ln(k_H))/d(1/T) ((1/T) - 1/(298.15 K)))
k°_H = Henry's law constant for solubility in water at 298.15 K (mol/(kg*bar))
d(ln(k_H))/d(1/T) = Temperature dependence constant (K)

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 evaluated as indicated in comments:
HL - Edward P. Hunter and Sharon G. Lias
L - Sharon G. Lias

Data compiled as indicated in comments:
B - John E. Bartmess
LBLHLM - Sharon G. Lias, John E. Bartmess, Joel F. Liebman, John L. Holmes, Rhoda D. Levin, and W. Gary Mallard
LLK - Sharon G. Lias, Rhoda D. Levin, and Sherif A. Kafafi
RDSH - Henry M. Rosenstock, Keith Draxl, Bruce W. Steiner, and John T. Herron

View reactions leading to C₂H₆O⁺ (ion structure unspecified)

Ionization energy determinations

Appearance energy determinations

De-protonation reactions

C₂H₅O^- +  =

By formula: C₂H₅O^- + H⁺ = C₂H₆O

Ion clustering 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:
M - Michael M. Meot-Ner (Mautner) and Sharon G. Lias
B - John E. Bartmess
RCD - Robert C. Dunbar

Note: Please consider using the reaction search for this species. This page allows searching of all reactions involving this species. Searches may be limited to ion clustering reactions. A general reaction search form is also available.

Clustering reactions

(CH₅O⁺ • ) +  = (CH₅O⁺ •  • )

By formula: (CH₅O⁺ • CH₄O) + C₂H₆O = (CH₅O⁺ • C₂H₆O • CH₄O)

Bond type: Hydrogen bonds of the type OH-O between organics

(CH₅O⁺ • 2) +  = (CH₅O⁺ •  • 2)

By formula: (CH₅O⁺ • 2CH₄O) + C₂H₆O = (CH₅O⁺ • C₂H₆O • 2CH₄O)

Bond type: Hydrogen bonds of the type OH-O between organics

(CH₅O⁺ • 3) +  = (CH₅O⁺ •  • 3)

By formula: (CH₅O⁺ • 3CH₄O) + C₂H₆O = (CH₅O⁺ • C₂H₆O • 3CH₄O)

Bond type: Hydrogen bonds of the type OH-O between organics

CH₅O⁺ +  = (CH₅O⁺ • )

By formula: CH₅O⁺ + C₂H₆O = (CH₅O⁺ • C₂H₆O)

Bond type: Hydrogen bonds of the type OH-O between organics

CH₆N⁺ +  = (CH₆N⁺ • )

By formula: CH₆N⁺ + C₂H₆O = (CH₆N⁺ • C₂H₆O)

Bond type: Hydrogen bonds of the type NH+-O between organics

(C₂H₇O⁺ • ) +  = (C₂H₇O⁺ •  • )

By formula: (C₂H₇O⁺ • CH₄O) + C₂H₆O = (C₂H₇O⁺ • C₂H₆O • CH₄O)

Bond type: Hydrogen bonds of the type OH-O between organics

(C₂H₇O⁺ • 2) +  = (C₂H₇O⁺ •  • 2)

By formula: (C₂H₇O⁺ • 2CH₄O) + C₂H₆O = (C₂H₇O⁺ • C₂H₆O • 2CH₄O)

Bond type: Hydrogen bonds of the type OH-O between organics

(C₂H₇O⁺ • 3) +  = (C₂H₇O⁺ •  • 3)

By formula: (C₂H₇O⁺ • 3CH₄O) + C₂H₆O = (C₂H₇O⁺ • C₂H₆O • 3CH₄O)

Bond type: Hydrogen bonds of the type OH-O between organics

C₂H₇O⁺ +  = (C₂H₇O⁺ • )

By formula: C₂H₇O⁺ + C₂H₆O = (C₂H₇O⁺ • C₂H₆O)

Bond type: Hydrogen bonds of the type OH-O between organics

(C₂H₇O⁺ • ) +  = (C₂H₇O⁺ • 2)

By formula: (C₂H₇O⁺ • C₂H₆O) + C₂H₆O = (C₂H₇O⁺ • 2C₂H₆O)

Bond type: Hydrogen bonds of the type OH-O between organics

(C₂H₇O⁺ •  • ) +  = (C₂H₇O⁺ • 2 • )

By formula: (C₂H₇O⁺ • C₂H₆O • H₂O) + C₂H₆O = (C₂H₇O⁺ • 2C₂H₆O • H₂O)

Bond type: Hydrogen bonds of the type OH-O between organics

(C₂H₇O⁺ •  • 2) +  = (C₂H₇O⁺ • 2 • 2)

By formula: (C₂H₇O⁺ • C₂H₆O • 2H₂O) + C₂H₆O = (C₂H₇O⁺ • 2C₂H₆O • 2H₂O)

Bond type: Hydrogen bonds of the type OH-O between organics

(C₂H₇O⁺ • 2 • ) +  = (C₂H₇O⁺ • 3 • )

By formula: (C₂H₇O⁺ • 2C₂H₆O • H₂O) + C₂H₆O = (C₂H₇O⁺ • 3C₂H₆O • H₂O)

Bond type: Hydrogen bonds between protonated and neutral organics

(C₂H₇O⁺ • ) +  = (C₂H₇O⁺ •  • )

By formula: (C₂H₇O⁺ • H₂O) + C₂H₆O = (C₂H₇O⁺ • C₂H₆O • H₂O)

Bond type: Hydrogen bonds of the type OH-O between organics

(C₂H₇O⁺ • 2) +  = (C₂H₇O⁺ •  • 2)

By formula: (C₂H₇O⁺ • 2H₂O) + C₂H₆O = (C₂H₇O⁺ • C₂H₆O • 2H₂O)

Bond type: Hydrogen bonds of the type OH-O between organics

(C₂H₇O⁺ • 3) +  = (C₂H₇O⁺ •  • 3)

By formula: (C₂H₇O⁺ • 3H₂O) + C₂H₆O = (C₂H₇O⁺ • C₂H₆O • 3H₂O)

Bond type: Hydrogen bonds of the type OH-O between organics

C₃H₇O₂⁺ +  = (C₃H₇O₂⁺ • )

By formula: C₃H₇O₂⁺ + C₂H₆O = (C₃H₇O₂⁺ • C₂H₆O)

Bond type: Hydrogen bonds of the type OH-O between organics

C₄H₉O₂⁺ +  = (C₄H₉O₂⁺ • )

By formula: C₄H₉O₂⁺ + C₂H₆O = (C₄H₉O₂⁺ • C₂H₆O)

Bond type: Hydrogen bonds of the type OH-O between organics

C₁₀H₁₀Fe⁺ +  = (C₁₀H₁₀Fe⁺ • )

By formula: C₁₀H₁₀Fe⁺ + C₂H₆O = (C₁₀H₁₀Fe⁺ • C₂H₆O)

Free energy of reaction

 +  = C₂H₆ClO^-

By formula: Cl^- + C₂H₆O = C₂H₆ClO^-

 +  = ( • )

By formula: Cs⁺ + C₂H₆O = (Cs⁺ • C₂H₆O)

( • ) +  = ( • 2)

By formula: (Cs⁺ • C₂H₆O) + C₂H₆O = (Cs⁺ • 2C₂H₆O)

( • 2) +  = ( • 3)

By formula: (Cs⁺ • 2C₂H₆O) + C₂H₆O = (Cs⁺ • 3C₂H₆O)

 +  = ( • )

By formula: Cu⁺ + C₂H₆O = (Cu⁺ • C₂H₆O)

( • ) +  = ( • 2)

By formula: (Cu⁺ • C₂H₆O) + C₂H₆O = (Cu⁺ • 2C₂H₆O)

( • 2) +  = ( • 3)

By formula: (Cu⁺ • 2C₂H₆O) + C₂H₆O = (Cu⁺ • 3C₂H₆O)

( • 3) +  = ( • 4)

By formula: (Cu⁺ • 3C₂H₆O) + C₂H₆O = (Cu⁺ • 4C₂H₆O)

 +  = ( • )

By formula: K⁺ + C₂H₆O = (K⁺ • C₂H₆O)

( • ) +  = ( • 2)

By formula: (K⁺ • C₂H₆O) + C₂H₆O = (K⁺ • 2C₂H₆O)

( • 2) +  = ( • 3)

By formula: (K⁺ • 2C₂H₆O) + C₂H₆O = (K⁺ • 3C₂H₆O)

( • 3) +  = ( • 4)

By formula: (K⁺ • 3C₂H₆O) + C₂H₆O = (K⁺ • 4C₂H₆O)

 +  = ( • )

By formula: Li⁺ + C₂H₆O = (Li⁺ • C₂H₆O)

Enthalpy of reaction

( • ) +  = ( • 2)

By formula: (Li⁺ • C₂H₆O) + C₂H₆O = (Li⁺ • 2C₂H₆O)

Enthalpy of reaction

( • 2) +  = ( • 3)

By formula: (Li⁺ • 2C₂H₆O) + C₂H₆O = (Li⁺ • 3C₂H₆O)

Enthalpy of reaction

( • 3) +  = ( • 4)

By formula: (Li⁺ • 3C₂H₆O) + C₂H₆O = (Li⁺ • 4C₂H₆O)

Enthalpy of reaction

 +  = ( • )

By formula: Na⁺ + C₂H₆O = (Na⁺ • C₂H₆O)

Free energy of reaction

( • ) +  = ( • 2)

By formula: (Na⁺ • C₂H₆O) + C₂H₆O = (Na⁺ • 2C₂H₆O)

( • 2) +  = ( • 3)

By formula: (Na⁺ • 2C₂H₆O) + C₂H₆O = (Na⁺ • 3C₂H₆O)

( • 3) +  = ( • 4)

By formula: (Na⁺ • 3C₂H₆O) + C₂H₆O = (Na⁺ • 4C₂H₆O)

 +  = ( • )

By formula: Rb⁺ + C₂H₆O = (Rb⁺ • C₂H₆O)

( • ) +  = ( • 2)

By formula: (Rb⁺ • C₂H₆O) + C₂H₆O = (Rb⁺ • 2C₂H₆O)

( • 2) +  = ( • 3)

By formula: (Rb⁺ • 2C₂H₆O) + C₂H₆O = (Rb⁺ • 3C₂H₆O)

Mass spectrum (electron ionization)

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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

Spectrum

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Additional Data

References

Go To: Top, Gas phase thermochemistry data, Condensed phase thermochemistry data, Phase change data, Henry's Law data, Gas phase ion energetics data, Ion clustering data, Mass spectrum (electron ionization), 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
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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]

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Banerjee S.C., 1964
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Stull D.R., 1969
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Kennedy, Sagenkahn, et al., 1941
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Notes

Go To: Top, Gas phase thermochemistry data, Condensed phase thermochemistry data, Phase change data, Henry's Law data, Gas phase ion energetics data, Ion clustering data, Mass spectrum (electron ionization), References

• Symbols used in this document:
  

  AE	Appearance energy
  Cp,gas	Constant pressure heat capacity of gas
  Cp,liquid	Constant pressure heat capacity of liquid
  IE (evaluated)	Recommended ionization energy
  Pc	Critical pressure
  S°liquid	Entropy of liquid at standard conditions
  T	Temperature
  Tboil	Boiling point
  Tc	Critical temperature
  Tfus	Fusion (melting) point
  Ttriple	Triple point temperature
  Vc	Critical volume
  d(ln(kH))/d(1/T)	Temperature dependence parameter for Henry's Law constant
  k°H	Henry's Law constant at 298.15K
  ΔcH°gas	Enthalpy of combustion of gas at standard conditions
  ΔfH°gas	Enthalpy of formation of gas at standard conditions
  ΔfusH	Enthalpy of fusion
  ΔfusS	Entropy of fusion
  ΔrG°	Free energy of reaction at standard conditions
  ΔrH°	Enthalpy of reaction at standard conditions
  ΔrS°	Entropy of reaction at standard conditions
  ΔvapH	Enthalpy of vaporization
  ΔvapH°	Enthalpy of vaporization at standard conditions
  ΔvapS	Entropy of vaporization
  ρc	Critical density

• Data from NIST Standard Reference Database 69: NIST Chemistry WebBook
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