Selected ATcT [1, 2] enthalpy of formation based on version 1.156 of the Thermochemical Network [3]

This version of ATcT results[3] was generated by additional expansion of version 1.148 to include species relevant to a recent study of the oxidation of ethylene [4] as well as new measurements that led to refining the thermochemistry of CF and SiF and their cations [5].

Methoxymethane

Formula: CH3OCH3 (g)
CAS RN: 115-10-6
ATcT ID: 115-10-6*0
SMILES: COC
InChI: InChI=1S/C2H6O/c1-3-2/h1-2H3
InChIKey: LCGLNKUTAGEVQW-UHFFFAOYSA-N
Hills Formula: C2H6O1

2D Image:

COC
Aliases: CH3OCH3; Methoxymethane; Dimethyl ether; Dimethylether; Oxybismethane; 1,1'-Oxybismethane; Dimethyl oxide; Wood ether; Methyl ether; UN 1033; (CH3)2O; H3COCH3
Relative Molecular Mass: 46.0684 ± 0.0017

   ΔfH°(0 K)   ΔfH°(298.15 K)UncertaintyUnits
-166.38-183.89± 0.36kJ/mol

3D Image of CH3OCH3 (g)

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Top contributors to the provenance of ΔfH° of CH3OCH3 (g)

The 20 contributors listed below account only for 74.1% of the provenance of ΔfH° of CH3OCH3 (g).
A total of 77 contributors would be needed to account for 90% of the provenance.

Please note: The list is limited to 20 most important contributors or, if less, a number sufficient to account for 90% of the provenance. The Reference acts as a further link to the relevant references and notes for the measurement. The Measured Quantity is normaly given in the original units; in cases where we have reinterpreted the original measurement, the listed value may differ from that given by the authors. The quoted uncertainty is the a priori uncertainty used as input when constructing the initial Thermochemical Network, and corresponds either to the value proposed by the original authors or to our estimate; if an additional multiplier is given in parentheses immediately after the prior uncertainty, it corresponds to the factor by which the prior uncertainty needed to be multiplied during the ATcT analysis in order to make that particular measurement consistent with the prevailing knowledge contained in the Thermochemical Network.

Contribution
(%)
TN
ID
Reaction Measured Quantity Reference
54.34383.1 CH3OCH3 (g) + 3 O2 (g) → 2 CO2 (g) + 3 H2O (cr,l) ΔrH°(298.15 K) = -349.06 ± 0.11 kcal/molPilcher 1964
2.84382.1 CH4 (g) H2O (g) → CH3OCH3 (g) + 2 H2 (g) ΔrH°(0 K) = 205.87 ± 2.00 kJ/molKlippenstein 2017
2.74384.7 CH3OCH3 (g) → CH3CH2OH (g) ΔrH°(0 K) = -51.22 ± 2.00 kJ/molKlippenstein 2017
1.74384.8 CH3OCH3 (g) → CH3CH2OH (g) ΔrH°(0 K) = -50.4 ± 2.5 kJ/molKlopper 2010a, est unc
1.34866.1 CH3CH2OCH3 (g) + 9/2 O2 (g) → 3 CO2 (g) + 4 H2O (cr,l) ΔrH°(298.15 K) = -503.68 ± 0.15 (×1.509) kcal/molPilcher 1964
1.34136.1 CH4 (g) H2O (g) → CH3OCH2 (g) + 5/2 H2 (g) ΔrH°(0 K) = 385.74 ± 2.00 kJ/molKlippenstein 2017
1.34381.10 CH3OCH3 (g) → 2 C (g) O (g) + 6 H (g) ΔrH°(0 K) = 3131.8 ± 3.0 kJ/molKlopper 2010a
0.94211.6 CH3OCH (g, anti singlet) CH4 (g) → CH3OCH3 (g) CH2 (g, singlet) ΔrH°(0 K) = 199.60 ± 2.0 kJ/molKlippenstein 2017
0.94388.8 O(CH2CH2) (g) + 2 CH4 (g) → CH3OCH3 (g) CH3CH3 (g) ΔrH°(0 K) = -15.16 ± 0.8 kcal/molRuscic W1RO, Parthiban 2001
0.7125.2 1/2 O2 (g) H2 (g) → H2O (cr,l) ΔrH°(298.15 K) = -285.8261 ± 0.040 kJ/molRossini 1939, Rossini 1931, Rossini 1931b, note H2Oa, Rossini 1930
0.74385.8 CH3OCH3 (g) H2O (g) → 2 CH3OH (g) ΔrH°(0 K) = 5.80 ± 0.9 kcal/molParthiban 2001, Ruscic W1RO
0.64385.7 CH3OCH3 (g) H2O (g) → 2 CH3OH (g) ΔrH°(0 K) = 6.11 ± 1.0 kcal/molRuscic CBS-n
0.64385.4 CH3OCH3 (g) H2O (g) → 2 CH3OH (g) ΔrH°(0 K) = 5.80 ± 1.0 kcal/molRuscic G4
0.54388.4 O(CH2CH2) (g) + 2 CH4 (g) → CH3OCH3 (g) CH3CH3 (g) ΔrH°(0 K) = -14.26 ± 1.0 kcal/molRuscic G4
0.54388.7 O(CH2CH2) (g) + 2 CH4 (g) → CH3OCH3 (g) CH3CH3 (g) ΔrH°(0 K) = -15.00 ± 1.0 kcal/molRuscic CBS-n
0.52359.1 H2 (g) C (graphite) → CH4 (g) ΔrG°(1165 K) = 37.521 ± 0.068 kJ/molSmith 1946, note COf, 3rd Law
0.57039.5 C6H5OCH3 (g) CH3OH (g) → C6H5OH (g) CH3OCH3 (g) ΔrH°(0 K) = -1.21 ± 0.9 kcal/molRuscic W1RO
0.54384.6 CH3OCH3 (g) → CH3CH2OH (g) ΔrH°(0 K) = -50.9 ± 4.6 kJ/molKarton 2014
0.54385.3 CH3OCH3 (g) H2O (g) → 2 CH3OH (g) ΔrH°(0 K) = 6.00 ± 1.1 kcal/molRuscic G3X
0.44388.3 O(CH2CH2) (g) + 2 CH4 (g) → CH3OCH3 (g) CH3CH3 (g) ΔrH°(0 K) = -14.72 ± 1.1 kcal/molRuscic G3X

Top 10 species with enthalpies of formation correlated to the ΔfH° of CH3OCH3 (g)

Please note: The correlation coefficients are obtained by renormalizing the off-diagonal elements of the covariance matrix by the corresponding variances.
The correlation coefficient is a number from -1 to 1, with 1 representing perfectly correlated species, -1 representing perfectly anti-correlated species, and 0 representing perfectly uncorrelated species.


Correlation
Coefficent
(%)
Species Name Formula Image    ΔfH°(0 K)    ΔfH°(298.15 K) Uncertainty Units Relative
Molecular
Mass
ATcT ID
28.3 MethoxymethylCH3OCH2 (g)CO[CH2]13.460.90± 0.86kJ/mol45.0605 ±
0.0017
16520-04-0*0
24.9 MethoxyethaneCH3CH2OCH3 (g)CCOC-194.29-217.18± 0.52kJ/mol60.0950 ±
0.0025
540-67-0*0
23.8 MethoxyetheneCH2CHOCH3 (g, cis)C=COC-89.3-107.1± 1.1kJ/mol58.0791 ±
0.0025
107-25-5*2
23.8 MethoxyetheneCH2CHOCH3 (g)C=COC-89.3-106.6± 1.1kJ/mol58.0791 ±
0.0025
107-25-5*0
19.8 MethoxymethyleneCH3OCH (g, singlet)CO[CH]129.24118.74± 0.78kJ/mol44.0526 ±
0.0017
19527-10-7*2
19.8 MethoxymethyleneCH3OCH (g)CO[CH]129.24118.74± 0.78kJ/mol44.0526 ±
0.0017
19527-10-7*0
19.8 MethoxymethyleneCH3OCH (g, anti singlet)CO[CH]129.24118.71± 0.78kJ/mol44.0526 ±
0.0017
19527-10-7*21
19.6 MethoxymethyleneCH3OCH (g, gauche triplet)CO[CH]245.4235.9± 1.4kJ/mol44.0526 ±
0.0017
19527-10-7*1
16.0 Carbonic acidC(O)(OH)2 (aq, undissoc)OC(=O)O-698.670± 0.028kJ/mol62.0248 ±
0.0012
463-79-6*1000
15.9 WaterH2O (cr,l)O-286.274-285.802± 0.022kJ/mol18.01528 ±
0.00033
7732-18-5*500

Most Influential reactions involving CH3OCH3 (g)

Please note: The list, which is based on a hat (projection) matrix analysis, is limited to no more than 20 largest influences.

Influence
Coefficient
TN
ID
Reaction Measured Quantity Reference
0.5654383.1 CH3OCH3 (g) + 3 O2 (g) → 2 CO2 (g) + 3 H2O (cr,l) ΔrH°(298.15 K) = -349.06 ± 0.11 kcal/molPilcher 1964
0.1944564.5 HOCH2OCH2OH (g, C1 I) CH4 (g) → CH3OCH3 (g) CH2(OH)2 (g) ΔrH°(0 K) = 13.14 ± 0.9 kcal/molRuscic W1RO
0.1774138.6 CH3OCH3 (g) CH2OH (g) → CH3OCH2 (g) CH3OH (g) ΔrH°(0 K) = 0.24 ± 2.00 kJ/molKlippenstein 2017
0.1724137.6 CH3OCH3 (g) → CH3OCH2 (g) H (g) ΔrH°(0 K) = 395.96 ± 2.00 kJ/molKlippenstein 2017
0.1574564.2 HOCH2OCH2OH (g, C1 I) CH4 (g) → CH3OCH3 (g) CH2(OH)2 (g) ΔrH°(0 K) = 13.19 ± 1.0 kcal/molRuscic G4
0.1574564.4 HOCH2OCH2OH (g, C1 I) CH4 (g) → CH3OCH3 (g) CH2(OH)2 (g) ΔrH°(0 K) = 13.65 ± 1.0 kcal/molRuscic CBS-n
0.1554211.6 CH3OCH (g, anti singlet) CH4 (g) → CH3OCH3 (g) CH2 (g, singlet) ΔrH°(0 K) = 199.60 ± 2.0 kJ/molKlippenstein 2017
0.1484212.5 CH3OCH (g, gauche triplet) CH4 (g) → CH3OCH3 (g) CH2 (g, triplet) ΔrH°(0 K) = 10.86 ± 0.85 kcal/molRuscic W1RO
0.1439551.4 CH3SCH2 (g) CH3OCH3 (g) → CH3SCH3 (g) CH3OCH2 (g) ΔrH°(0 K) = 2.66 ± 0.85 kcal/molRuscic W1RO
0.1324212.2 CH3OCH (g, gauche triplet) CH4 (g) → CH3OCH3 (g) CH2 (g, triplet) ΔrH°(0 K) = 11.19 ± 0.90 kcal/molRuscic G4
0.1324212.1 CH3OCH (g, gauche triplet) CH4 (g) → CH3OCH3 (g) CH2 (g, triplet) ΔrH°(0 K) = 10.30 ± 0.90 kcal/molRuscic G3X
0.1324212.4 CH3OCH (g, gauche triplet) CH4 (g) → CH3OCH3 (g) CH2 (g, triplet) ΔrH°(0 K) = 11.76 ± 0.90 kcal/molRuscic CBS-n
0.1304564.1 HOCH2OCH2OH (g, C1 I) CH4 (g) → CH3OCH3 (g) CH2(OH)2 (g) ΔrH°(0 K) = 13.59 ± 1.1 kcal/molRuscic G3X
0.1289551.2 CH3SCH2 (g) CH3OCH3 (g) → CH3SCH3 (g) CH3OCH2 (g) ΔrH°(0 K) = 2.44 ± 0.90 kcal/molRuscic G4
0.1289551.1 CH3SCH2 (g) CH3OCH3 (g) → CH3SCH3 (g) CH3OCH2 (g) ΔrH°(0 K) = 2.46 ± 0.90 kcal/molRuscic G3X
0.1074212.3 CH3OCH (g, gauche triplet) CH4 (g) → CH3OCH3 (g) CH2 (g, triplet) ΔrH°(0 K) = 11.04 ± 1.0 kcal/molRuscic CBS-n
0.1039551.3 CH3SCH2 (g) CH3OCH3 (g) → CH3SCH3 (g) CH3OCH2 (g) ΔrH°(0 K) = 2.70 ± 1.00 kcal/molRuscic CBS-n
0.0934564.3 HOCH2OCH2OH (g, C1 I) CH4 (g) → CH3OCH3 (g) CH2(OH)2 (g) ΔrH°(0 K) = 13.50 ± 1.3 kcal/molRuscic CBS-n
0.0824884.5 CH2CHOCH3 (g, cis) CH3OH (g) → CH3OCH3 (g) CH2CHOH (g, syn) ΔrH°(0 K) = -0.14 ± 0.85 kcal/molRuscic W1RO
0.0734884.4 CH2CHOCH3 (g, cis) CH3OH (g) → CH3OCH3 (g) CH2CHOH (g, syn) ΔrH°(0 K) = -0.04 ± 0.90 kcal/molRuscic CBS-n


References
1   B. Ruscic, R. E. Pinzon, M. L. Morton, G. von Laszewski, S. Bittner, S. G. Nijsure, K. A. Amin, M. Minkoff, and A. F. Wagner,
Introduction to Active Thermochemical Tables: Several "Key" Enthalpies of Formation Revisited.
J. Phys. Chem. A 108, 9979-9997 (2004) [DOI: 10.1021/jp047912y]
2   B. Ruscic, R. E. Pinzon, G. von Laszewski, D. Kodeboyina, A. Burcat, D. Leahy, D. Montoya, and A. F. Wagner,
Active Thermochemical Tables: Thermochemistry for the 21st Century.
J. Phys. Conf. Ser. 16, 561-570 (2005) [DOI: 10.1088/1742-6596/16/1/078]
3   B. Ruscic and D. H. Bross,
Active Thermochemical Tables (ATcT) values based on ver. 1.156 of the Thermochemical Network (2024); available at ATcT.anl.gov
4   N. A. Seifert, B. Ruscic, R. Sivaramakrishnan, and K. Prozument,
The C2H4O Isomers in the Oxidation of Ethylene
J. Mol. Spectrosc. 398, 111847/1-8 (2023) [DOI: 10.1016/j.jms.2023.111847]
5   U. Jacovella, B. Ruscic, N. L. Chen, H.-L. Le, S. Boyé-Péronne, S. Hartweg, M. Roy-Chowdhury, G. A. Garcia, J.-C. Loison, and B. Gans,
Refining Thermochemical Properties of CF, SiF, and Their Cations by Combining Photoelectron Spectroscopy, Quantum Chemical Calculations, and the Active Thermochemical Tables Approach
Phys. Chem. Chem. Phys. 25, 30838-30847 (2023) [DOI: 10.1039/D3CP04244H]
6   B. Ruscic,
Uncertainty Quantification in Thermochemistry, Benchmarking Electronic Structure Computations, and Active Thermochemical Tables.
Int. J. Quantum Chem. 114, 1097-1101 (2014) [DOI: 10.1002/qua.24605]
7   B. Ruscic and D. H. Bross,
Thermochemistry
Computer Aided Chem. Eng. 45, 3-114 (2019) [DOI: 10.1016/B978-0-444-64087-1.00001-2]

Formula
The aggregate state is given in parentheses following the formula, such as: g - gas-phase, cr - crystal, l - liquid, etc.

Uncertainties
The listed uncertainties correspond to estimated 95% confidence limits, as customary in thermochemistry (see, for example, Ruscic [6] and Ruscic and Bross[7]).
Note that an uncertainty of ± 0.000 kJ/mol indicates that the estimated uncertainty is < ± 0.0005 kJ/mol.

Website Functionality Credits
The reorganization of the website was developed and implemented by David H. Bross (ANL).
The find function is based on the complete Species Dictionary entries for the appropriate version of the ATcT TN.
The molecule images are rendered by Indigo-depict.
The XYZ renderings are based on Jmol: an open-source Java viewer for chemical structures in 3D. http://www.jmol.org/.

Acknowledgement
This work was supported by the U.S. Department of Energy, Office of Science, Office of Basic Energy Sciences, Division of Chemical Sciences, Geosciences and Biosciences under Contract No. DE-AC02-06CH11357.