Selected ATcT [1, 2] enthalpy of formation based on version 1.122r of the Thermochemical Network [3]

This version of ATcT results was generated from an expansion of version 1.122q [4, 5] to include a non-rigid rotor anharmonic oscillator (NRRAO) partition function for hydroxymethyl [6], as well as data on 42 additional species, some of which are related to soot formation mechanisms.

Species Name Formula Image    ΔfH°(0 K)    ΔfH°(298.15 K) Uncertainty Units Relative
Molecular
Mass		 ATcT ID
SilaneSiH4 (g)[SiH4]42.8833.27± 0.70kJ/mol32.11726 ±
0.00041		7803-62-5*0

Representative Geometry of SiH4 (g)

spin ON           spin OFF
          

Top contributors to the provenance of ΔfH° of SiH4 (g)

The 9 contributors listed below account for 62.0% of the provenance of ΔfH° of SiH4 (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
13.16430.1 SiH3SiH3 (g) → 2 Si (cr,l) + 3 H2 (g) ΔrH°(298.15 K) = -19.1 ± 0.6 (×1.445) kcal/molGunn 1961, est unc
11.36391.1 Si (cr,l) + 2 F2 (g) → SiF4 (g) ΔrH°(298.15 K) = -385.98 ± 0.19 kcal/molWise 1963, Wise 1962
11.06397.1 SiH4 (g) → Si (cr,l) + 2 H2 (g) ΔrH°(298.15 K) = -8.3 ± 0.5 kcal/molGunn 1961, Gurvich TPIS, est unc
7.36340.2 Si (cr,l) → Si (g) ΔrG°(1525 K) = 231.1 ± 2.0 kJ/molBatdorf 1959, 3rd Law
5.06355.1 Si (cr,l) + O2 (g) → SiO2 (cr,l) ΔrH°(298.15 K) = -217.58 ± 0.35 kcal/molGood 1964, Good 1962, King 1951
4.36390.8 SiF4 (g) → Si (g) + 4 F (g) ΔrH°(0 K) = 565.92 ± 0.30 kcal/molKarton 2011
3.66371.6 SiO2 (cr,l) + Si (cr,l) → 2 SiO (g) ΔrG°(1618 K) = 37.94 ± 0.29 (×1.477) kcal/molRamstad 1961, 3rd Law, Gurvich TPIS
3.46427.7 SiH3SiH3 (g) → 2 Si (g) + 6 H (g) ΔrH°(0 K) = 503.09 ± 0.30 kcal/molKarton 2011, Karton 2007b
2.66371.8 SiO2 (cr,l) + Si (cr,l) → 2 SiO (g) ΔrG°(1403 K) = 54.5 ± 0.5 kcal/molEmons 1972, 3rd Law

Top 10 species with enthalpies of formation correlated to the ΔfH° of SiH4 (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
94.4 DisilaneSiH3SiH3 (g)[SiH3][SiH3]92.376.3± 1.4kJ/mol62.21864 ±
0.00073		1590-87-0*0
85.3 SiliconSi (g)[Si]450.53454.86± 0.64kJ/mol28.08550 ±
0.00030		7440-21-3*0
85.3 Silicon anionSi- (g)[Si-]316.46319.44± 0.64kJ/mol28.08605 ±
0.00030		14337-02-1*0
85.3 Silicon cationSi+ (g)[Si+]1237.041241.17± 0.64kJ/mol28.08495 ±
0.00030		14067-07-3*0
68.6 MethylsilaneCH3SiH3 (g)C[SiH3]-9.46-25.63± 0.96kJ/mol46.14384 ±
0.00095		992-94-9*0
67.7 SilylidyneSiH (g)[SiH]371.45373.24± 0.81kJ/mol29.09344 ±
0.00031		13774-94-2*0
65.7 Silyliumyl[SiH2]+ (g)[SiH2+]1155.91154.3± 1.1kJ/mol30.10083 ±
0.00033		28149-31-7*0
64.7 DisiliconSi2 (g)[Si][Si]587.8591.7± 1.7kJ/mol56.17100 ±
0.00060		12597-35-2*0
59.0 Disilicon anion[Si2]- (g)[Si][Si-]375.5379.4± 1.9kJ/mol56.17155 ±
0.00060		64236-73-3*0
58.9 Disilane cation[SiH3SiH3]+ (g)[SiH3][SiH3+]1030.51017.7± 2.3kJ/mol62.21809 ±
0.00073		96301-43-8*0

Most Influential reactions involving SiH4 (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
0.6206420.1 SiH4 (g) → [SiH2]+ (g) + H2 (g) ΔrH°(0 K) = 11.54 ± 0.01 eVBerkowitz 1987a
0.5866395.1 SiH4 (g) → [SiH4]+ (g) ΔrH°(0 K) = 11.00 ± 0.02 eVBerkowitz 1987a
0.4236446.1 CH3SiH2CH3 (g) + SiH4 (g) → 2 CH3SiH3 (g) ΔrG°(333 K) = -0.06 ± 1.38 kJ/molRussell 1959, Doncaster 1986, 3rd Law, est unc
0.3096432.7 SiH3SiH3 (g) + 2 CH4 (g) → CH3CH3 (g) + 2 SiH4 (g) ΔrH°(0 K) = 13.99 ± 0.2 kcal/molKarton 2011, Karton 2007b
0.3046431.8 SiH3SiH3 (g) + H2 (g) → 2 SiH4 (g) ΔrH°(0 K) = -1.47 ± 0.2 kcal/molKarton 2011, Karton 2007b
0.2576439.4 CH3Si(O)CH3 (g) + 2 SiH4 (g) → 2 CH3SiH3 (g) + SiH2O (g) ΔrH°(0 K) = 9.20 ± 0.9 kcal/molRuscic W1RO
0.2296437.4 2 SiH2O (g) → SiH4 (g) + SiO2 (g) ΔrH°(0 K) = -11.38 ± 0.9 kcal/molRuscic W1RO
0.2086439.2 CH3Si(O)CH3 (g) + 2 SiH4 (g) → 2 CH3SiH3 (g) + SiH2O (g) ΔrH°(0 K) = 9.26 ± 1.0 kcal/molRuscic G4
0.2086454.4 SiH(CH3)3 (g) + SiH3 (g) → Si(CH3)3 (g) + SiH4 (g) ΔrH°(0 K) = 2.72 ± 0.9 kcal/molRuscic W1RO
0.1856437.2 2 SiH2O (g) → SiH4 (g) + SiO2 (g) ΔrH°(0 K) = -11.06 ± 1.0 kcal/molRuscic G4
0.1856404.5 SiH4 (g) → SiH3 (g) + H (g) ΔrH°(0 K) = 90.2 ± 0.5 kcal/molFeller 1999a
0.1726439.1 CH3Si(O)CH3 (g) + 2 SiH4 (g) → 2 CH3SiH3 (g) + SiH2O (g) ΔrH°(0 K) = 9.71 ± 1.1 kcal/molRuscic G3X
0.1686454.2 SiH(CH3)3 (g) + SiH3 (g) → Si(CH3)3 (g) + SiH4 (g) ΔrH°(0 K) = 1.83 ± 1.0 kcal/molRuscic G4
0.1626488.4 (CH3)3SiO (g) + SiH4 (g) → SiH3O (g) + SiH(CH3)3 (g) ΔrH°(0 K) = 6.11 ± 0.85 kcal/molRuscic W1RO
0.1536437.1 2 SiH2O (g) → SiH4 (g) + SiO2 (g) ΔrH°(0 K) = -11.78 ± 1.1 kcal/molRuscic G3X
0.1526482.4 (CH3)3SiOH (g) + SiH4 (g) → SiH3OH (g) + SiH(CH3)3 (g) ΔrH°(0 K) = 5.81 ± 0.90 kcal/molRuscic W1RO
0.1466395.5 SiH4 (g) → [SiH4]+ (g) ΔrH°(0 K) = 11.004 ± 0.040 eVRuscic W1RO
0.1466478.4 SiH3OH (g) + SiH3 (g) → SiH2OH (g) + SiH4 (g) ΔrH°(0 K) = 1.25 ± 0.9 kcal/molRuscic W1RO
0.1466444.4 SiH3OSiH3 (g) + 2 H2 (g) → 2 SiH4 (g) + H2O (g) ΔrH°(0 K) = 41.19 ± 1.2 kcal/molRuscic W1RO
0.1446488.2 (CH3)3SiO (g) + SiH4 (g) → SiH3O (g) + SiH(CH3)3 (g) ΔrH°(0 K) = 7.57 ± 0.90 kcal/molRuscic 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 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. 1.122r of the Thermochemical Network, Argonne National Laboratory, Lemont, Illinois 2021 [DOI: 10.17038/CSE/1822363]; available at ATcT.anl.gov
4   D. Feller, D. H. Bross, and B. Ruscic,
Enthalpy of Formation of C2H2O4 (Oxalic Acid) from High-Level Calculations and the Active Thermochemical Tables Approach.
J. Phys. Chem. A 123, 3481-3496 (2019) [DOI: 10.1021/acs.jpca.8b12329]
5   B. K. Welch, R. Dawes, D. H. Bross, and B. Ruscic,
An Automated Thermochemistry Protocol Based on Explicitly Correlated Coupled-Cluster Theory: The Methyl and Ethyl Peroxy Families.
J. Phys. Chem. A 123, 5673-5682 (2019) [DOI: 10.1021/acs.jpca.8b12329]
6   D. H. Bross, H.-G. Yu, L. B. Harding, and B. Ruscic,
Active Thermochemical Tables: The Partition Function of Hydroxymethyl (CH2OH) Revisited.
J. Phys. Chem. A 123, 4212-4231 (2019) [DOI: 10.1021/acs.jpca.9b02295]
7   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]
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 [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.