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

This version of ATcT results was generated from an expansion of version 1.122o [4] to include an updated enthalpy of formation for Hydrazine. [5].

Species Name Formula Image    ΔfH°(0 K)    ΔfH°(298.15 K) Uncertainty Units Relative
Molecular
Mass		 ATcT ID
AcetonitrileCH3CN (cr,l)CC#N40.59± 0.23kJ/mol41.0520 ±
0.0016		75-05-8*500

Top contributors to the provenance of ΔfH° of CH3CN (cr,l)

The 13 contributors listed below account for 90.1% of the provenance of ΔfH° of CH3CN (cr,l).

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
51.92287.1 2 CH3CN (cr,l) + 11/2 O2 (g) → 4 CO2 (g) + 3 H2O (l) + N2 (g) ΔrH°(298.15 K) = -2512.56 ± 0.60 kJ/molAn 1983
34.12287.2 2 CH3CN (cr,l) + 11/2 O2 (g) → 4 CO2 (g) + 3 H2O (l) + N2 (g) ΔrH°(298.15 K) = -2512.76 ± 0.74 kJ/molBarnes 1976, An 1983
1.1118.2 1/2 O2 (g) + H2 (g) → H2O (cr,l) ΔrH°(298.15 K) = -285.8261 ± 0.040 kJ/molRossini 1939, Rossini 1931, Rossini 1931b, note H2Oa, Rossini 1930
0.41764.7 C (graphite) + O2 (g) → CO2 (g) ΔrH°(298.15 K) = -393.464 ± 0.024 kJ/molHawtin 1966, note CO2e
0.32288.5 CH3CN (g) + HCCH (g) → HCN (g) + CH3CCH (g) ΔrH°(0 K) = 2.92 ± 0.85 kcal/molRuscic W1RO
0.22288.2 CH3CN (g) + HCCH (g) → HCN (g) + CH3CCH (g) ΔrH°(0 K) = 2.93 ± 0.90 kcal/molRuscic G4
0.22288.4 CH3CN (g) + HCCH (g) → HCN (g) + CH3CCH (g) ΔrH°(0 K) = 2.66 ± 0.90 kcal/molRuscic CBS-n
0.22288.1 CH3CN (g) + HCCH (g) → HCN (g) + CH3CCH (g) ΔrH°(0 K) = 3.16 ± 0.90 kcal/molRuscic G3X
0.22289.5 CH3CN (g) + CH3CCH (g) → HCN (g) + CH3CCCH3 (g) ΔrH°(0 K) = 3.82 ± 0.85 kcal/molRuscic W1RO
0.21888.1 2 H2 (g) + C (graphite) → CH4 (g) ΔrG°(1165 K) = 37.521 ± 0.068 kJ/molSmith 1946, note COf, 3rd Law
0.22289.4 CH3CN (g) + CH3CCH (g) → HCN (g) + CH3CCCH3 (g) ΔrH°(0 K) = 4.16 ± 0.90 kcal/molRuscic CBS-n
0.22289.1 CH3CN (g) + CH3CCH (g) → HCN (g) + CH3CCCH3 (g) ΔrH°(0 K) = 4.06 ± 0.90 kcal/molRuscic G3X
0.22289.2 CH3CN (g) + CH3CCH (g) → HCN (g) + CH3CCCH3 (g) ΔrH°(0 K) = 3.92 ± 0.90 kcal/molRuscic G4

Top 10 species with enthalpies of formation correlated to the ΔfH° of CH3CN (cr,l)

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
87.5 AcetonitrileCH3CN (g)CC#N81.0974.04± 0.25kJ/mol41.0520 ±
0.0016		75-05-8*0
29.0 IsocyanomethaneCH3NC (g)C[N+]#[C-]183.18176.71± 0.67kJ/mol41.0520 ±
0.0016		593-75-9*0
23.3 Cyanomethanide[CH2CN]- (g)[CH2-]C#N114.17111.34± 0.77kJ/mol40.0446 ±
0.0016		21438-99-3*0
23.3 CyanomethylCH2CN (g)[CH2]C#N263.32260.44± 0.77kJ/mol40.0440 ±
0.0016		2932-82-3*0
21.8 Cyanomethylium[CH2CN]+ (g)[CH2+]C#N1256.701254.06± 0.82kJ/mol40.0435 ±
0.0016		34430-18-7*0
16.3 WaterH2O (cr, l, eq.press.)O-286.304-285.832± 0.026kJ/mol18.01528 ±
0.00033		7732-18-5*499
16.3 WaterH2O (cr,l)O-286.302-285.830± 0.026kJ/mol18.01528 ±
0.00033		7732-18-5*500
16.3 WaterH2O (l, eq.press.)O-285.832± 0.026kJ/mol18.01528 ±
0.00033		7732-18-5*589
16.3 WaterH2O (l)O-285.830± 0.026kJ/mol18.01528 ±
0.00033		7732-18-5*590
16.3 Oxonium[H3O]+ (aq)[OH3+]-285.830± 0.026kJ/mol19.02267 ±
0.00037		13968-08-6*800

Most Influential reactions involving CH3CN (cr,l)

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
0.5422287.1 2 CH3CN (cr,l) + 11/2 O2 (g) → 4 CO2 (g) + 3 H2O (l) + N2 (g) ΔrH°(298.15 K) = -2512.56 ± 0.60 kJ/molAn 1983
0.3652286.3 CH3CN (cr,l) → CH3CN (g) ΔrH°(298.15 K) = 33.50 ± 0.20 kJ/molAn 1983
0.3562287.2 2 CH3CN (cr,l) + 11/2 O2 (g) → 4 CO2 (g) + 3 H2O (l) + N2 (g) ΔrH°(298.15 K) = -2512.76 ± 0.74 kJ/molBarnes 1976, An 1983
0.3312286.4 CH3CN (cr,l) → CH3CN (g) ΔrH°(298.15 K) = 33.45 ± 0.21 kJ/molHoward 1970, An 1983
0.2162286.2 CH3CN (cr,l) → CH3CN (g) ΔrH°(298.15 K) = 33.42 ± 0.26 kJ/molThermoData 2004
0.0582286.1 CH3CN (cr,l) → CH3CN (g) ΔrH°(298.15 K) = 33.40 ± 0.50 kJ/molMajer 1985
0.0002287.3 2 CH3CN (cr,l) + 11/2 O2 (g) → 4 CO2 (g) + 3 H2O (l) + N2 (g) ΔrH°(298.15 K) = -596.16 ± 3.42 (×1.297) kcal/molHall 1971
0.0002287.4 2 CH3CN (cr,l) + 11/2 O2 (g) → 4 CO2 (g) + 3 H2O (l) + N2 (g) ΔrH°(298.15 K) = -608.0 ± 12.0 kcal/molLemoult 1909
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. 1.122p of the Thermochemical Network (2020); available at ATcT.anl.gov
4   P. B. Changala, T. L. Nguyen, J. H. Baraban, G. B. Ellison, J. F. Stanton, D. H. Bross, and B. Ruscic,
Active Thermochemical Tables: The Adiabatic Ionization Energy of Hydrogen Peroxide.
J. Phys. Chem. A 121, 8799-8806 (2017) [DOI: 10.1021/acs.jpca.7b06221] (highlighted on the journal cover)
5   D. Feller, D. H. Bross, and B. Ruscic,
Enthalpy of Formation of N2H4 (Hydrazine) Revisited.
J. Phys. Chem. A 121, 6187-6198 (2017) [DOI: 10.1021/acs.jpca.7b06017]
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]
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.