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].

Chloromethane

Formula: CH3Cl (g)
CAS RN: 74-87-3
ATcT ID: 74-87-3*0
SMILES: CCl
InChI: InChI=1S/CH3Cl/c1-2/h1H3
InChIKey: NEHMKBQYUWJMIP-UHFFFAOYSA-N
Hills Formula: C1H3Cl1

2D Image:

CCl
Aliases: CH3Cl; Chloromethane; Methyl chloride; Methyl monochloride; Monochloromethane; Carbon monochloride; Monochlorocarbon; RCRA U045; UN 1063; Freon 40; R 40; Artic; MeCl
Relative Molecular Mass: 50.4872 ± 0.0012

   ΔfH°(0 K)   ΔfH°(298.15 K)UncertaintyUnits
-74.72-82.65± 0.18kJ/mol

3D Image of CH3Cl (g)

spin ON           spin OFF
          

Top contributors to the provenance of ΔfH° of CH3Cl (g)

The 20 contributors listed below account only for 56.8% of the provenance of ΔfH° of CH3Cl (g).
A total of 277 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
18.06193.6 CH3Cl (g) → CCl4 (g) + 3 CH4 (g) ΔrH°(0 K) = 2.52 ± 0.30 kcal/molKarton 2017
9.46200.1 CH3Br (g) → [CH3]+ (g) Br (g) ΔrH°(0 K) = 12.834 ± 0.002 (×2.538) eVSong 2001
5.06378.7 CH4 (g) CH2Cl2 (g) → 2 CH3Cl (g) ΔrH°(0 K) = 1.03 ± 0.25 kcal/molKarton 2017, Karton 2011, Karton 2007, Karton 2006
3.46184.1 CH3Cl (g) + 3/2 O2 (g) → CO2 (g) H2O (cr,l) HCl (aq, 600 H2O) ΔrH°(298.15 K) = -764.00 ± 0.50 (×1.874) kJ/molFletcher 1971
2.16381.6 CH4 (g) CCl4 (g) → CH3Cl (g) CHCl3 (g) ΔrH°(0 K) = -3.24 ± 0.25 kcal/molKarton 2017, Karton 2011, Karton 2007, Karton 2006
1.96187.10 CH3Cl (g) H (g) → CH4 (g) Cl (g) ΔrH°(0 K) = -7296 ± 100 cm-1Czako 2012
1.86379.7 CH4 (g) CHCl3 (g) → CH2Cl2 (g) CH3Cl (g) ΔrH°(0 K) = -0.13 ± 0.25 kcal/molKarton 2017, Karton 2011, Karton 2007, Karton 2006
1.62359.1 H2 (g) C (graphite) → CH4 (g) ΔrG°(1165 K) = 37.521 ± 0.068 kJ/molSmith 1946, note COf, 3rd Law
1.56203.1 CH3Br (g) H2 (g) → CH4 (g) HBr (g) ΔrH°(523.15 K) = -18.062 ± 0.321 kcal/molFowell 1965
1.36180.3 CH3Cl (g) → C (g) + 3 H (g) Cl (g) ΔrH°(0 K) = 371.31 ± 0.35 kcal/molKarton 2017
1.36141.8 HCCCl (g) CH4 (g) → HCCH (g) CH3Cl (g) ΔrH°(0 K) = -2.17 ± 0.25 kcal/molKarton 2017, Karton 2011, Karton 2007, Karton 2006
1.26664.8 CO2 (g) CCl4 (g) → 2 CCl2O (g) ΔrH°(0 K) = 11.18 ± 0.25 kcal/molKarton 2017, Karton 2011, Karton 2007, Karton 2006
1.06219.1 CH3Br (l) H2 (g) → 2 CH4 (g) Br2 (cr,l) ΔrH°(298.15 K) = -6.60 ± 0.60 (×1.164) kcal/molAdams 1966, as quoted by Cox 1970
1.06180.5 CH3Cl (g) → C (g) + 3 H (g) Cl (g) ΔrH°(0 K) = 371.34 ± 0.4 kcal/molFeller 2008
1.06409.6 CH3Cl (g) → CHCl3 (g) + 2 CH4 (g) ΔrH°(0 K) = -0.33 ± 0.9 kcal/molRuscic W1RO
1.06215.12 CH3Br (g) → CBr4 (g) + 3 CH4 (g) ΔrH°(0 K) = 6.20 ± 1.0 kcal/molxyx 2016
0.95915.6 CCl4 (g) + 4 F (g) → CF4 (g) + 4 Cl (g) ΔrH°(0 K) = -160.16 ± 0.30 (×1.114) kcal/molKarton 2017
0.96142.8 HCCCl (g) CH3Cl (g) → ClCCCl (g) CH4 (g) ΔrH°(0 K) = 2.93 ± 0.25 kcal/molKarton 2017, Karton 2011, Karton 2007, Karton 2006
0.86263.8 CHCl3 (g) → C (g) + 3 Cl (g) H (g) ΔrH°(0 K) = 329.79 ± 0.35 kcal/molKarton 2017
0.76234.4 CH3I (g) CBr4 (g) → 4 CH3Br (g) CI4 (g) ΔrH°(0 K) = -0.04 ± 1.0 kcal/molxyx 2016

Top 10 species with enthalpies of formation correlated to the ΔfH° of CH3Cl (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
99.1 Chloromethane cation[CH3Cl]+ (g)C[Cl+]1014.561007.79± 0.18kJ/mol50.4867 ±
0.0012
12538-71-5*0
98.3 ChloromethaneCH3Cl (l)CCl-106.51-102.55± 0.19kJ/mol50.4872 ±
0.0012
74-87-3*590
81.1 BromomethaneCH3Br (g)CBr-20.53-35.93± 0.20kJ/mol94.9385 ±
0.0013
74-83-9*0
79.0 Bromomethane cation[CH3Br]+ (g)C[Br+]996.59981.67± 0.21kJ/mol94.9380 ±
0.0013
12538-70-4*0
77.4 BromomethaneCH3Br (l)CBr-56.25-59.26± 0.21kJ/mol94.9385 ±
0.0013
74-83-9*590
36.2 TetrachloromethaneCCl4 (g)ClC(Cl)(Cl)Cl-89.41-91.58± 0.42kJ/mol153.8215 ±
0.0037
56-23-5*0
36.0 TetrachloromethaneCCl4 (l)ClC(Cl)(Cl)Cl-104.67-124.08± 0.42kJ/mol153.8215 ±
0.0037
56-23-5*500
34.6 ChloroformCHCl3 (g)C(Cl)(Cl)Cl-94.62-99.52± 0.40kJ/mol119.3767 ±
0.0028
67-66-3*0
33.5 DichloromethaneCH2Cl2 (g)C(Cl)Cl-86.91-93.77± 0.34kJ/mol84.9320 ±
0.0020
75-09-2*0
32.1 ChloroformCHCl3 (l)C(Cl)(Cl)Cl-130.93± 0.43kJ/mol119.3767 ±
0.0028
67-66-3*590

Most Influential reactions involving CH3Cl (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
0.9866181.1 CH3Cl (g) → [CH3Cl]+ (g) ΔrH°(0 K) = 91057.0 ± 2.0 cm-1Grutter 2011
0.9626204.3 CH3Br (g) HCl (g) → CH3Cl (g) HBr (g) ΔrG°(449.3 K) = 10.036 ± 0.019 kJ/molBak 1948, 3rd Law
0.2846193.6 CH3Cl (g) → CCl4 (g) + 3 CH4 (g) ΔrH°(0 K) = 2.52 ± 0.30 kcal/molKarton 2017
0.2726142.8 HCCCl (g) CH3Cl (g) → ClCCCl (g) CH4 (g) ΔrH°(0 K) = 2.93 ± 0.25 kcal/molKarton 2017, Karton 2011, Karton 2007, Karton 2006
0.2565976.6 CH3Cl (g) → [CH2Cl]- (g) H+ (g) ΔrH°(0 K) = 396.34 ± 0.90 kcal/molRuscic W1RO
0.2115975.1 CH3Cl (g) → CH2Cl (g) + 1/2 H2 (g) ΔrH°(0 K) = 193.72 ± 1.9 kJ/molCsontos 2010
0.1956382.6 CH3Cl (g) CCl4 (g) → CH2Cl2 (g) CHCl3 (g) ΔrH°(0 K) = -4.27 ± 0.25 kcal/molKarton 2017
0.1836141.8 HCCCl (g) CH4 (g) → HCCH (g) CH3Cl (g) ΔrH°(0 K) = -2.17 ± 0.25 kcal/molKarton 2017, Karton 2011, Karton 2007, Karton 2006
0.1566196.16 CH3Cl (l) → CH3Cl (g) ΔrG°(243.190 K) = 0.543 ± 0.083 kJ/molGaneff 1948, 3rd Law, ThermoData 2004
0.1566196.10 CH3Cl (l) → CH3Cl (g) ΔrG°(243.750 K) = 0.489 ± 0.083 kJ/molMesserly 1940, 3rd Law, ThermoData 2004
0.1436379.7 CH4 (g) CHCl3 (g) → CH2Cl2 (g) CH3Cl (g) ΔrH°(0 K) = -0.13 ± 0.25 kcal/molKarton 2017, Karton 2011, Karton 2007, Karton 2006
0.1426378.7 CH4 (g) CH2Cl2 (g) → 2 CH3Cl (g) ΔrH°(0 K) = 1.03 ± 0.25 kcal/molKarton 2017, Karton 2011, Karton 2007, Karton 2006
0.1296196.4 CH3Cl (l) → CH3Cl (g) ΔrG°(231.405 K) = 1.626 ± 0.091 kJ/molThermoData 2004, 3rd Law
0.1266381.6 CH4 (g) CCl4 (g) → CH3Cl (g) CHCl3 (g) ΔrH°(0 K) = -3.24 ± 0.25 kcal/molKarton 2017, Karton 2011, Karton 2007, Karton 2006
0.1216196.12 CH3Cl (l) → CH3Cl (g) ΔrG°(228.426 K) = 1.879 ± 0.094 kJ/molMesserly 1940, 3rd Law, ThermoData 2004
0.1216196.14 CH3Cl (l) → CH3Cl (g) ΔrG°(273.130 K) = -2.049 ± 0.094 kJ/molGaneff 1948, 3rd Law, ThermoData 2004
0.1118252.4 HCCCH2Cl (g) CH3 (g) → CH2CCH (g) CH3Cl (g) ΔrH°(0 K) = -13.58 ± 0.9 kcal/molRuscic W1RO
0.0965996.4 CH2(Cl)OH (g) CH4 (g) → CH3OH (g) CH3Cl (g) ΔrH°(0 K) = 8.12 ± 0.85 kcal/molRuscic W1RO
0.0926006.4 CH(Cl)OH (g, syn-gauche) CH4 (g) → CH2OH (g) CH3Cl (g) ΔrH°(0 K) = 8.68 ± 0.85 kcal/molRuscic W1RO
0.0916011.4 CH2(Cl)O (g) CH4 (g) → CH3O (g) CH3Cl (g) ΔrH°(0 K) = 7.49 ± 0.85 kcal/molRuscic W1RO


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.