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].

Trimethylsilane

Formula: SiH(CH3)3 (g)

CAS RN: 993-07-7

ATcT ID: 993-07-7*0

SMILES: C[SiH](C)C

InChI: InChI=1S/C3H10Si/c1-4(2)3/h4H,1-3H3

InChIKey: PQDJYEQOELDLCP-UHFFFAOYSA-N

Hills Formula: C3H10Si1

2D Image:

Aliases: SiH(CH3)3; Trimethylsilane; 2-Methyl-2-silapropane; Trimethylsilyl hydride; Dow Corning 9-5170; (CH3)3SiH

Relative Molecular Mass: 74.1970 ± 0.0025

Δ_fH°(0 K)	Δ_fH°(298.15 K)	Uncertainty	Units
-125.8	-151.9	± 1.5	kJ/mol

3D Image of SiH(CH3)3 (g)

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Top contributors to the provenance of Δ_fH° of SiH(CH3)3 (g)

The 20 contributors listed below account only for 52.7% of the provenance of Δ_fH° of SiH(CH3)3 (g).
A total of 93 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
5.7	8759.2	Si(CH3)4 (g) → Si (g) + 4 C (g) + 12 H (g)	Δ_rH°(0 K) = 1451.02 ± 1.60 kcal/mol	Ruscic G4
5.7	8759.4	Si(CH3)4 (g) → Si (g) + 4 C (g) + 12 H (g)	Δ_rH°(0 K) = 1453.34 ± 1.50 (×1.067) kcal/mol	Ruscic W1RO
4.9	8759.1	Si(CH3)4 (g) → Si (g) + 4 C (g) + 12 H (g)	Δ_rH°(0 K) = 1451.64 ± 1.72 kcal/mol	Ruscic G3X
3.6	8738.4	SiH(CH3)3 (g) → Si (g) + 3 C (g) + 10 H (g)	Δ_rH°(0 K) = 1165.30 ± 1.50 kcal/mol	Ruscic W1RO
3.2	8738.2	SiH(CH3)3 (g) → Si (g) + 3 C (g) + 10 H (g)	Δ_rH°(0 K) = 1163.11 ± 1.60 kcal/mol	Ruscic G4
3.0	8764.4	Si(CH3)3 (g) → Si (g) + 3 C (g) + 9 H (g)	Δ_rH°(0 K) = 1072.00 ± 1.50 kcal/mol	Ruscic W1RO
2.8	8738.1	SiH(CH3)3 (g) → Si (g) + 3 C (g) + 10 H (g)	Δ_rH°(0 K) = 1163.50 ± 1.72 kcal/mol	Ruscic G3X
2.7	8759.3	Si(CH3)4 (g) → Si (g) + 4 C (g) + 12 H (g)	Δ_rH°(0 K) = 1449.49 ± 2.16 (×1.067) kcal/mol	Ruscic CBS-n
2.6	8764.2	Si(CH3)3 (g) → Si (g) + 3 C (g) + 9 H (g)	Δ_rH°(0 K) = 1070.89 ± 1.60 kcal/mol	Ruscic G4
2.5	8538.1	Si (cr,l) + 2 F2 (g) → SiF4 (g)	Δ_rH°(298.15 K) = -385.98 ± 0.19 kcal/mol	Wise 1963, Wise 1963, Wise 1962
2.3	8764.1	Si(CH3)3 (g) → Si (g) + 3 C (g) + 9 H (g)	Δ_rH°(0 K) = 1070.39 ± 1.72 kcal/mol	Ruscic G3X
1.7	8738.3	SiH(CH3)3 (g) → Si (g) + 3 C (g) + 10 H (g)	Δ_rH°(0 K) = 1162.34 ± 2.16 kcal/mol	Ruscic CBS-n
1.7	8718.4	2 CH3SiH3 (g) → SiH3SiH3 (g) + CH3CH3 (g)	Δ_rH°(0 K) = 10.76 ± 1.2 kcal/mol	Ruscic W1RO
1.5	8729.4	CH3SiH2CH3 (g) → Si (g) + 2 C (g) + 8 H (g)	Δ_rH°(0 K) = 877.68 ± 1.50 kcal/mol	Ruscic W1RO
1.5	8718.2	2 CH3SiH3 (g) → SiH3SiH3 (g) + CH3CH3 (g)	Δ_rH°(0 K) = 10.76 ± 1.3 kcal/mol	Ruscic G4
1.4	8764.3	Si(CH3)3 (g) → Si (g) + 3 C (g) + 9 H (g)	Δ_rH°(0 K) = 1069.04 ± 2.16 kcal/mol	Ruscic CBS-n
1.3	8729.2	CH3SiH2CH3 (g) → Si (g) + 2 C (g) + 8 H (g)	Δ_rH°(0 K) = 875.79 ± 1.60 kcal/mol	Ruscic G4
1.3	8718.1	2 CH3SiH3 (g) → SiH3SiH3 (g) + CH3CH3 (g)	Δ_rH°(0 K) = 10.66 ± 1.4 kcal/mol	Ruscic G3X
1.2	8807.4	(CH3)3SiO (g) → 3 C (g) + 9 H (g) + Si (g) + O (g)	Δ_rH°(0 K) = 1186.70 ± 1.50 kcal/mol	Ruscic W1RO
1.2	8805.4	(CH3)3SiOH (g) → 3 C (g) + 10 H (g) + Si (g) + O (g)	Δ_rH°(0 K) = 1305.26 ± 1.50 kcal/mol	Ruscic W1RO

Top 10 species with enthalpies of formation correlated to the Δ_fH° of SiH(CH3)3 (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
97.2	Tetramethylsilane	Si(CH3)4 (g)	-185.8	-216.3	± 1.9	kJ/mol	88.2236 ± 0.0033	75-76-3*0
94.4	Dimethylsilane	CH3SiH2CH3 (g)	-66.8	-88.2	± 1.1	kJ/mol	60.1704 ± 0.0017	1111-74-6*0
91.1	Trimethylsilylium	[Si(CH3)3]+ (g)	655.4	634.8	± 1.9	kJ/mol	73.1885 ± 0.0025	28927-31-3*0
87.4	Bromotrimethylsilane	SiBr(CH3)3 (g)	-259.4	-290.1	± 2.0	kJ/mol	153.0931 ± 0.0027	2857-97-8*0
86.0	Iodotrimethylsilane	SiI(CH3)3 (g)	-189.7	-214.5	± 2.1	kJ/mol	200.0935 ± 0.0025	16029-98-4*0
76.0	Fluorotrimethylsilane	SiF(CH3)3 (g)	-547.2	-570.8	± 2.0	kJ/mol	92.1875 ± 0.0025	420-56-4*0
71.4	Chlorotrimethylsilane	SiCl(CH3)3 (g)	-326.3	-349.5	± 2.3	kJ/mol	108.6418 ± 0.0027	75-77-4*0
69.1	Trimethylsilyl	Si(CH3)3 (g)	47.5	25.4	± 1.9	kJ/mol	73.1891 ± 0.0025	16571-41-8*0
66.4	Trimethylsilanide	[Si(CH3)3]- (g)	-42.0	-65.5	± 2.1	kJ/mol	73.1896 ± 0.0025	54711-92-1*0
63.1	Methylsilane	CH3SiH3 (g)	-9.83	-26.00	± 0.89	kJ/mol	46.14384 ± 0.00095	992-94-9*0

Most Influential reactions involving SiH(CH3)3 (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
0.984	8739.1	SiH(CH3)3 (g) + CH3SiH3 (g) → 2 CH3SiH2CH3 (g)	Δ_rG°(398 K) = -1.38 ± 0.10 kJ/mol	Doncaster 1986, 3rd Law
0.892	8760.1	Si(CH3)4 (g) + CH3SiH2CH3 (g) → 2 SiH(CH3)3 (g)	Δ_rG°(398 K) = -2.87 ± 0.32 kJ/mol	Doncaster 1986, 3rd Law
0.220	8778.5	SiH(CH3)3 (g) + [CH3O]- (g) → [Si(CH3)3]- (g) + CH3OH (g)	Δ_rH°(0 K) = 4.26 ± 0.8 kcal/mol	Ruscic W1RO
0.160	8812.4	(CH3)3SiO (g) + SiH4 (g) → SiH3O (g) + SiH(CH3)3 (g)	Δ_rH°(0 K) = 6.11 ± 0.85 kcal/mol	Ruscic W1RO
0.160	8777.4	SiH(CH3)3 (g) → [Si(CH3)3]- (g) + H+ (g)	Δ_rH°(0 K) = 386.17 ± 0.90 (×1.044) kcal/mol	Ruscic W1RO
0.150	8806.4	(CH3)3SiOH (g) + SiH4 (g) → SiH3OH (g) + SiH(CH3)3 (g)	Δ_rH°(0 K) = 5.81 ± 0.90 kcal/mol	Ruscic W1RO
0.143	8812.2	(CH3)3SiO (g) + SiH4 (g) → SiH3O (g) + SiH(CH3)3 (g)	Δ_rH°(0 K) = 7.57 ± 0.90 kcal/mol	Ruscic G4
0.143	8812.1	(CH3)3SiO (g) + SiH4 (g) → SiH3O (g) + SiH(CH3)3 (g)	Δ_rH°(0 K) = 7.06 ± 0.90 kcal/mol	Ruscic G3X
0.141	8778.3	SiH(CH3)3 (g) + [CH3O]- (g) → [Si(CH3)3]- (g) + CH3OH (g)	Δ_rH°(0 K) = 3.31 ± 1.0 kcal/mol	Ruscic G4
0.137	8770.4	SiH(CH3)3 (g) + SiH3 (g) → Si(CH3)3 (g) + SiH4 (g)	Δ_rH°(0 K) = 2.72 ± 0.9 kcal/mol	Ruscic W1RO
0.125	8753.4	SiCl(CH3)3 (g) + SiH4 (g) → SiH(CH3)3 (g) + SiH3Cl (g)	Δ_rH°(0 K) = 7.07 ± 0.85 kcal/mol	Ruscic W1RO
0.122	8752.4	SiF(CH3)3 (g) + SiH4 (g) → SiH(CH3)3 (g) + SiH3F (g)	Δ_rH°(0 K) = 7.58 ± 0.85 kcal/mol	Ruscic W1RO
0.122	8806.2	(CH3)3SiOH (g) + SiH4 (g) → SiH3OH (g) + SiH(CH3)3 (g)	Δ_rH°(0 K) = 6.35 ± 1.00 kcal/mol	Ruscic G4
0.116	8812.3	(CH3)3SiO (g) + SiH4 (g) → SiH3O (g) + SiH(CH3)3 (g)	Δ_rH°(0 K) = 6.70 ± 1.00 kcal/mol	Ruscic CBS-n
0.111	8753.1	SiCl(CH3)3 (g) + SiH4 (g) → SiH(CH3)3 (g) + SiH3Cl (g)	Δ_rH°(0 K) = 8.14 ± 0.90 kcal/mol	Ruscic G3X
0.111	8753.2	SiCl(CH3)3 (g) + SiH4 (g) → SiH(CH3)3 (g) + SiH3Cl (g)	Δ_rH°(0 K) = 7.70 ± 0.90 kcal/mol	Ruscic G4
0.111	8770.2	SiH(CH3)3 (g) + SiH3 (g) → Si(CH3)3 (g) + SiH4 (g)	Δ_rH°(0 K) = 1.83 ± 1.0 kcal/mol	Ruscic G4
0.109	8752.2	SiF(CH3)3 (g) + SiH4 (g) → SiH(CH3)3 (g) + SiH3F (g)	Δ_rH°(0 K) = 7.73 ± 0.90 kcal/mol	Ruscic G4
0.109	8752.1	SiF(CH3)3 (g) + SiH4 (g) → SiH(CH3)3 (g) + SiH3F (g)	Δ_rH°(0 K) = 8.41 ± 0.90 kcal/mol	Ruscic G3X
0.107	8754.2	SiBr(CH3)3 (g) + SiH4 (g) → SiH(CH3)3 (g) + SiH3Br (g)	Δ_rH°(0 K) = 7.95 ± 0.90 kcal/mol	Ruscic G4

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.