Selected ATcT [1, 2] enthalpy of formation based on version 1.176 of the Thermochemical Network [3]

This version of ATcT results[3] was generated by additional expansion of version 1.172 to include species related to Criegee intermediates that are involved in several ongoing studies[4].

(Methylthio)methyl

Formula: CH3SCH2 (g)

CAS RN: 31533-72-9

ATcT ID: 31533-72-9*0

SMILES: CS[CH2]

InChI: InChI=1S/C2H5S/c1-3-2/h1H2,2H3

InChIKey: HLVMZRXHDRXSJY-UHFFFAOYSA-N

Hills Formula: C2H5S1

2D Image:

Aliases: CH3SCH2; (Methylthio)methyl; (Methylsulfanyl)methyl

Relative Molecular Mass: 61.1271 ± 0.0062

Δ_fH°(0 K)	Δ_fH°(298.15 K)	Uncertainty	Units
149.5	137.8	± 1.4	kJ/mol

3D Image of CH3SCH2 (g)

spin ON spin OFF

Top contributors to the provenance of Δ_fH° of CH3SCH2 (g)

The 14 contributors listed below account for 90.0% of the provenance of Δ_fH° of CH3SCH2 (g).

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
11.9	9817.4	CH3SCH2 (g) + CH3CH2CH3 (g) → CH3SCH3 (g) + CH3CH2CH2 (g)	Δ_rH°(0 K) = 7.65 ± 0.85 kcal/mol	Ruscic W1RO
10.6	9817.2	CH3SCH2 (g) + CH3CH2CH3 (g) → CH3SCH3 (g) + CH3CH2CH2 (g)	Δ_rH°(0 K) = 7.19 ± 0.90 kcal/mol	Ruscic G4
10.6	9817.1	CH3SCH2 (g) + CH3CH2CH3 (g) → CH3SCH3 (g) + CH3CH2CH2 (g)	Δ_rH°(0 K) = 7.21 ± 0.90 kcal/mol	Ruscic G3X
8.7	9816.4	CH3SCH2 (g) + CH3OCH3 (g) → CH3SCH3 (g) + CH3OCH2 (g)	Δ_rH°(0 K) = 2.66 ± 0.85 kcal/mol	Ruscic W1RO
8.6	9817.3	CH3SCH2 (g) + CH3CH2CH3 (g) → CH3SCH3 (g) + CH3CH2CH2 (g)	Δ_rH°(0 K) = 7.47 ± 1.00 kcal/mol	Ruscic CBS-n
7.8	9816.2	CH3SCH2 (g) + CH3OCH3 (g) → CH3SCH3 (g) + CH3OCH2 (g)	Δ_rH°(0 K) = 2.44 ± 0.90 kcal/mol	Ruscic G4
7.8	9816.1	CH3SCH2 (g) + CH3OCH3 (g) → CH3SCH3 (g) + CH3OCH2 (g)	Δ_rH°(0 K) = 2.46 ± 0.90 kcal/mol	Ruscic G3X
6.3	9816.3	CH3SCH2 (g) + CH3OCH3 (g) → CH3SCH3 (g) + CH3OCH2 (g)	Δ_rH°(0 K) = 2.70 ± 1.00 kcal/mol	Ruscic CBS-n
4.1	9815.4	CH3SCH3 (g) → CH3SCH2 (g) + H (g)	Δ_rH°(0 K) = 92.25 ± 1.50 kcal/mol	Ruscic W1RO
3.6	9815.2	CH3SCH3 (g) → CH3SCH2 (g) + H (g)	Δ_rH°(0 K) = 91.76 ± 1.60 kcal/mol	Ruscic G4
3.3	9811.1	CH3SCH3 (cr,l) + 5 O2 (g) → 2 CO2 (g) + 2 H2O (cr,l) + OS(O)(OH)2 (aq, 45 H2O)	Δ_rH°(298.15 K) = -521.10 ± 0.08 kcal/mol	McCullough 1957a
3.1	9815.1	CH3SCH3 (g) → CH3SCH2 (g) + H (g)	Δ_rH°(0 K) = 92.39 ± 1.72 kcal/mol	Ruscic G3X
1.9	9815.3	CH3SCH3 (g) → CH3SCH2 (g) + H (g)	Δ_rH°(0 K) = 92.78 ± 2.16 kcal/mol	Ruscic CBS-n
1.2	4189.6	CH3OCH3 (g) → CH3OCH2 (g) + H (g)	Δ_rH°(0 K) = 395.96 ± 2.00 kJ/mol	Klippenstein 2017

Top 10 species with enthalpies of formation correlated to the Δ_fH° of CH3SCH2 (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	Δ_fH°(0 K)	Δ_fH°(298.15 K)	Uncertainty	Units	Relative Molecular Mass	ATcT ID
25.2	Dimethyl sulfide	CH3SCH3 (g)	-20.24	-36.75	± 0.35	kJ/mol	62.1350 ± 0.0062	75-18-3*0
25.2	Methoxymethyl	CH3OCH2 (g)	13.45	0.88	± 0.86	kJ/mol	45.0605 ± 0.0017	16520-04-0*0
23.4	Dimethyl sulfide	CH3SCH3 (cr,l)	-63.12	-64.72	± 0.33	kJ/mol	62.1350 ± 0.0062	75-18-3*500
18.3	Dimethyl sulfide cation	[CH3SCH3]+ (g)	817.85	802.10	± 0.48	kJ/mol	62.1345 ± 0.0062	34480-65-4*0
14.3	Dimethylsulfoxide	CH3S(O)CH3 (cr,l)	-201.94	-203.59	± 0.49	kJ/mol	78.1344 ± 0.0062	67-68-5*500
14.3	Dimethylsulfoxide	CH3S(O)CH3 (l)		-203.59	± 0.49	kJ/mol	78.1344 ± 0.0062	67-68-5*590
12.9	n-Propyl	CH3CH2CH2 (g)	118.44	101.04	± 0.39	kJ/mol	43.0877 ± 0.0024	2143-61-5*0
12.5	Dimethylsulfoxide	CH3S(O)CH3 (g)	-131.92	-150.57	± 0.57	kJ/mol	78.1344 ± 0.0062	67-68-5*0
10.0	Ethanethiol	CH3CH2SH (cr,l)	-71.49	-73.10	± 0.37	kJ/mol	62.1350 ± 0.0062	75-08-1*500
9.6	Sulfuric acid dihydrate	(OS(O)(OH)2)(H2O)2 (cr,l)	-1422.15	-1426.94	± 0.14	kJ/mol	134.1100 ± 0.0063	13451-10-0*500

Most Influential reactions involving CH3SCH2 (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
0.143	9816.4	CH3SCH2 (g) + CH3OCH3 (g) → CH3SCH3 (g) + CH3OCH2 (g)	Δ_rH°(0 K) = 2.66 ± 0.85 kcal/mol	Ruscic W1RO
0.138	9817.4	CH3SCH2 (g) + CH3CH2CH3 (g) → CH3SCH3 (g) + CH3CH2CH2 (g)	Δ_rH°(0 K) = 7.65 ± 0.85 kcal/mol	Ruscic W1RO
0.128	9816.2	CH3SCH2 (g) + CH3OCH3 (g) → CH3SCH3 (g) + CH3OCH2 (g)	Δ_rH°(0 K) = 2.44 ± 0.90 kcal/mol	Ruscic G4
0.128	9816.1	CH3SCH2 (g) + CH3OCH3 (g) → CH3SCH3 (g) + CH3OCH2 (g)	Δ_rH°(0 K) = 2.46 ± 0.90 kcal/mol	Ruscic G3X
0.123	9817.1	CH3SCH2 (g) + CH3CH2CH3 (g) → CH3SCH3 (g) + CH3CH2CH2 (g)	Δ_rH°(0 K) = 7.21 ± 0.90 kcal/mol	Ruscic G3X
0.123	9817.2	CH3SCH2 (g) + CH3CH2CH3 (g) → CH3SCH3 (g) + CH3CH2CH2 (g)	Δ_rH°(0 K) = 7.19 ± 0.90 kcal/mol	Ruscic G4
0.103	9816.3	CH3SCH2 (g) + CH3OCH3 (g) → CH3SCH3 (g) + CH3OCH2 (g)	Δ_rH°(0 K) = 2.70 ± 1.00 kcal/mol	Ruscic CBS-n
0.099	9817.3	CH3SCH2 (g) + CH3CH2CH3 (g) → CH3SCH3 (g) + CH3CH2CH2 (g)	Δ_rH°(0 K) = 7.47 ± 1.00 kcal/mol	Ruscic CBS-n
0.044	9815.4	CH3SCH3 (g) → CH3SCH2 (g) + H (g)	Δ_rH°(0 K) = 92.25 ± 1.50 kcal/mol	Ruscic W1RO
0.038	9815.2	CH3SCH3 (g) → CH3SCH2 (g) + H (g)	Δ_rH°(0 K) = 91.76 ± 1.60 kcal/mol	Ruscic G4
0.033	9815.1	CH3SCH3 (g) → CH3SCH2 (g) + H (g)	Δ_rH°(0 K) = 92.39 ± 1.72 kcal/mol	Ruscic G3X
0.021	9815.3	CH3SCH3 (g) → CH3SCH2 (g) + H (g)	Δ_rH°(0 K) = 92.78 ± 2.16 kcal/mol	Ruscic 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 21^st 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. 1.176 of the Thermochemical Network (2024); available at ATcT.anl.gov
4		T. L. Nguyen et al, ongoing studies (2024)
5		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]
6		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 [5] and Ruscic and Bross[6]).
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.