Selected ATcT [1, 2] enthalpy of formation based on version 1.130 of the Thermochemical Network [3]

This version of ATcT results[4] was generated by additional expansion of version 1.128 [5,6] to include with the calculations provided in reference [4].

Silicon carbide

Formula: SiC (g)
CAS RN: 409-21-2
ATcT ID: 409-21-2*0
SMILES: [Si]=[C]
InChI: InChI=1S/CSi/c1-2
InChIKey: HBMJWWWQQXIZIP-UHFFFAOYSA-N
Hills Formula: C1Si1

2D Image:

[Si]=[C]
Aliases: SiC; Silicon carbide; Silanyliumylidynemethanide
Relative Molecular Mass: 40.09620 ± 0.00085

   ΔfH°(0 K)   ΔfH°(298.15 K)UncertaintyUnits
740.4745.3± 2.4kJ/mol

3D Image of SiC (g)

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

The 16 contributors listed below account for 90.7% of the provenance of ΔfH° of SiC (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
12.17991.4 SiC (g) → Si (g) C (g) ΔrH°(0 K) = 99.75 ± 1.50 kcal/molRuscic W1RO
10.77991.2 SiC (g) → Si (g) C (g) ΔrH°(0 K) = 100.97 ± 1.60 kcal/molRuscic G4
10.57991.7 SiC (g) → Si (g) C (g) ΔrH°(0 K) = 4.32 ± 0.07 eVBorin 2005, est unc
9.27991.1 SiC (g) → Si (g) C (g) ΔrH°(0 K) = 101.87 ± 1.72 kcal/molRuscic G3X
8.07991.6 SiC (g) → Si (g) C (g) ΔrH°(0 K) = 4.30 ± 0.08 eVMartin 1990b
6.17994.4 [SiC]+ (g) → Si (g) C (g) ΔrH°(0 K) = -106.37 ± 1.50 kcal/molRuscic W1RO
5.87991.3 SiC (g) → Si (g) C (g) ΔrH°(0 K) = 100.69 ± 2.16 kcal/molRuscic CBS-n
5.37994.2 [SiC]+ (g) → Si (g) C (g) ΔrH°(0 K) = -104.82 ± 1.60 kcal/molRuscic G4
4.77991.5 SiC (g) → Si (g) C (g) ΔrH°(0 K) = 426.5 ± 10 kJ/molDeng 2008, est unc
4.67994.1 [SiC]+ (g) → Si (g) C (g) ΔrH°(0 K) = -103.60 ± 1.72 kcal/molRuscic G3X
4.18005.1 SiC (cr, alpha-hex) → SiC (g) ΔrG°(2248 K) = 84.12 ± 2.6 kcal/molDrowart 1958, 3rd Law
2.97994.3 [SiC]+ (g) → Si (g) C (g) ΔrH°(0 K) = -105.91 ± 2.16 kcal/molRuscic CBS-n
2.77992.4 SiC (g) → [SiC]+ (g) ΔrH°(0 K) = 8.938 ± 0.040 eVRuscic W1RO
1.47996.1 SiC (g) → Si (g) C (graphite) ΔrG°(2300 K) = -38.42 ± 3.69 (×1.164) kcal/molVerhaegen 1964, 3rd Law
1.17960.6 Si2 (g) → [Si2]+ (g) ΔrH°(0 K) = 7.905 ± 0.040 eVRuscic W1RO
0.87992.2 SiC (g) → [SiC]+ (g) ΔrH°(0 K) = 8.924 ± 0.073 eVRuscic G4

Top 10 species with enthalpies of formation correlated to the ΔfH° of SiC (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
66.0 Silicon carbide cation[SiC]+ (g)[Si][C+]1602.01606.7± 2.6kJ/mol40.09565 ±
0.00085
78393-58-5*0
53.7 Silicon carbide anion[SiC]- (g)[Si][C-]509.8514.5± 4.4kJ/mol40.09675 ±
0.00085
86017-99-4*0
24.4 Silicon atom tetracation[Si]+4 (g)[Si+4]10401.1410404.12± 0.59kJ/mol28.08331 ±
0.00030
22537-24-2*0
24.4 Silicon atom trication[Si]+3 (g)[Si+3]6045.626048.60± 0.59kJ/mol28.08385 ±
0.00030
14175-56-5*0
24.4 Silicon atom dication[Si]+2 (g)[Si++]2814.032817.02± 0.59kJ/mol28.08440 ±
0.00030
14175-55-4*0
24.4 Silicon cationSi+ (g)[Si+]1236.901241.03± 0.59kJ/mol28.08495 ±
0.00030
14067-07-3*0
24.4 Silicon anionSi- (g)[Si-]316.31319.30± 0.59kJ/mol28.08605 ±
0.00030
14337-02-1*0
24.4 SiliconSi (g)[Si]450.38454.72± 0.59kJ/mol28.08550 ±
0.00030
7440-21-3*0
21.0 DisilaneSiH3SiH3 (g)[SiH3][SiH3]92.176.0± 1.3kJ/mol62.21864 ±
0.00073
1590-87-0*0
20.9 SilaneSiH4 (g)[SiH4]42.6833.06± 0.65kJ/mol32.11726 ±
0.00041
7803-62-5*0

Most Influential reactions involving SiC (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
0.5757993.4 [SiC]- (g) → SiC (g) ΔrH°(0 K) = 2.388 ± 0.050 eVRuscic W1RO
0.4268006.4 SiC (g) [Si2]+ (g) → [SiC]+ (g) Si2 (g) ΔrH°(0 K) = 1.033 ± 0.030 eVRuscic W1RO
0.2767992.4 SiC (g) → [SiC]+ (g) ΔrH°(0 K) = 8.938 ± 0.040 eVRuscic W1RO
0.1707993.3 [SiC]- (g) → SiC (g) ΔrH°(0 K) = 2.428 ± 0.092 eVRuscic CBS-n
0.1598006.2 SiC (g) [Si2]+ (g) → [SiC]+ (g) Si2 (g) ΔrH°(0 K) = 1.001 ± 0.049 eVRuscic G4
0.1437993.5 [SiC]- (g) → SiC (g) ΔrH°(0 K) = 2.42 ± 0.10 eVInostroza 2010, est unc
0.1297991.4 SiC (g) → Si (g) C (g) ΔrH°(0 K) = 99.75 ± 1.50 kcal/molRuscic W1RO
0.1147991.2 SiC (g) → Si (g) C (g) ΔrH°(0 K) = 100.97 ± 1.60 kcal/molRuscic G4
0.1127991.7 SiC (g) → Si (g) C (g) ΔrH°(0 K) = 4.32 ± 0.07 eVBorin 2005, est unc
0.0998006.1 SiC (g) [Si2]+ (g) → [SiC]+ (g) Si2 (g) ΔrH°(0 K) = 1.015 ± 0.062 eVRuscic G3X
0.0987991.1 SiC (g) → Si (g) C (g) ΔrH°(0 K) = 101.87 ± 1.72 kcal/molRuscic G3X
0.0857991.6 SiC (g) → Si (g) C (g) ΔrH°(0 K) = 4.30 ± 0.08 eVMartin 1990b
0.0837992.2 SiC (g) → [SiC]+ (g) ΔrH°(0 K) = 8.924 ± 0.073 eVRuscic G4
0.0637993.6 [SiC]- (g) → SiC (g) ΔrH°(0 K) = 2.28 ± 0.15 eVPramanik 2009, est unc
0.0627991.3 SiC (g) → Si (g) C (g) ΔrH°(0 K) = 100.69 ± 2.16 kcal/molRuscic CBS-n
0.0598005.1 SiC (cr, alpha-hex) → SiC (g) ΔrG°(2248 K) = 84.12 ± 2.6 kcal/molDrowart 1958, 3rd Law
0.0517992.1 SiC (g) → [SiC]+ (g) ΔrH°(0 K) = 8.910 ± 0.093 eVRuscic G3X
0.0517991.5 SiC (g) → Si (g) C (g) ΔrH°(0 K) = 426.5 ± 10 kJ/molDeng 2008, est unc
0.0457992.3 SiC (g) → [SiC]+ (g) ΔrH°(0 K) = 8.959 ± 0.099 eVRuscic CBS-n
0.0388006.5 SiC (g) [Si2]+ (g) → [SiC]+ (g) Si2 (g) ΔrH°(0 K) = 1.03 ± 0.10 eVBruna 1981, est unc


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. 1.130 of the Thermochemical Network. Argonne National Laboratory, Lemont, Illinois 2023; available at ATcT.anl.gov
[DOI: 10.17038/CSE/1997229]
4   N. Genossar, P. B. Changala, B. Gans, J.-C. Loison, S. Hartweg, M.-A. Martin-Drumel, G. A. Garcia, J. F. Stanton, B. Ruscic, and J. H. Baraban
Ring-Opening Dynamics of the Cyclopropyl Radical and Cation: the Transition State Nature of the Cyclopropyl Cation
J. Am. Chem. Soc. 144, 18518-18525 (2022) [DOI: 10.1021/jacs.2c07740]
5   B. Ruscic and D. H. Bross
Active Thermochemical Tables: The Thermophysical and Thermochemical Properties of Methyl, CH3, and Methylene, CH2, Corrected for Nonrigid Rotor and Anharmonic Oscillator Effects.
Mol. Phys. e1969046 (2021) [DOI: 10.1080/00268976.2021.1969046]
6   J. H. Thorpe, J. L. Kilburn, D. Feller, P. B. Changala, D. H. Bross, B. Ruscic, and J. F. Stanton,
Elaborated Thermochemical Treatment of HF, CO, N2, and H2O: Insight into HEAT and Its Extensions
J. Chem. Phys. 155, 184109 (2021) [DOI: 10.1063/5.0069322]
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]
8   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]).
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.