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
Azanide[NH2]- (g)[NH2-]114.74111.87± 0.30kJ/mol16.02317 ±
0.00016		17655-31-1*0

Representative Geometry of [NH2]- (g)

spin ON           spin OFF
          

Top contributors to the provenance of ΔfH° of [NH2]- (g)

The 20 contributors listed below account only for 83.5% of the provenance of ΔfH° of [NH2]- (g).
A total of 47 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
29.01397.1 [NH2]- (g) → NH2 (g) ΔrH°(0 K) = 0.771 ± 0.005 eVWickham-Jones 1989
20.11398.11 [NH2]- (g) → NH2 (g) ΔrH°(0 K) = 0.773 ± 0.006 eVFeller 2016, note unc2
7.21397.4 [NH2]- (g) → NH2 (g) ΔrH°(0 K) = 0.768 ± 0.010 eVRadisic 2002
6.11404.4 [NH2]- (g) + H2 (g) → H- (g) + NH3 (g) ΔrG°(296 K) = -1.916 ± 0.272 (×1.022) kcal/molBohme 1973, MacKay 1976, note unc2
2.91404.2 [NH2]- (g) + H2 (g) → H- (g) + NH3 (g) ΔrG°(297 K) = -1.945 ± 0.400 kcal/molBohme 1973, note unc2
2.94975.1 [C6H5]- (g) → C6H5 (g) ΔrH°(0 K) = 1.096 ± 0.006 eVGunion 1992
2.52181.1 CH3NH2 (g) + [NH2]- (g) → [CH3NH]- (g) + NH3 (g) ΔrG°(296 K) = -0.51 ± 0.20 kcal/molMacKay 1976, note unc2
2.11406.1 NH3 (g) → [NH2]+ (g) + H (g) ΔrH°(0 K) = 15.765 ± 0.002 eVSong 2001a, note unc2
1.62182.1 [CH3NH]- (g) + H2 (g) → H- (g) + CH3NH2 (g) ΔrG°(296 K) = -1.46 ± 0.29 kcal/molMacKay 1976, note unc2
1.51398.10 [NH2]- (g) → NH2 (g) ΔrH°(0 K) = 0.770 ± 0.022 eVBoese 2004
1.11397.2 [NH2]- (g) → NH2 (g) ΔrH°(0 K) = 0.744 ± 0.022 (×1.139) eVSmyth 1972
0.82059.1 [CH2CH]- (g) → CH2CH (g) ΔrH°(0 K) = 0.667 ± 0.024 eVErvin 1990
0.74986.9 C6H5 (g) + CH4 (g) → C6H6 (g) + CH3 (g) ΔrG°(710 K) = -26.4 ± 2 kJ/molHeckmann 1996, Zhang 1989, 3rd Law, est unc
0.72176.1 [CH3NH]- (g) → CH3NH (g) ΔrH°(0 K) = 0.432 ± 0.015 eVRadisic 2002
0.64992.1 C6H6 (g) + [OH]- (g) → [C6H5]- (g) + H2O (g) ΔrH°(600 K) = 9.9 ± 0.6 (×1.354) kcal/molMeot-Ner 1986, Meot-Ner 1988, note std dev
0.51398.9 [NH2]- (g) → NH2 (g) ΔrH°(0 K) = 0.769 ± 0.035 eVParthiban 2001
0.51403.1 NH3 (g) → [NH2]- (g) + H+ (g) ΔrH°(0 K) = 402.47 ± 0.90 kcal/molRuscic W1RO, Ruscic W1U
0.51406.4 NH3 (g) → [NH2]+ (g) + H (g) ΔrH°(0 K) = 15.768 ± 0.004 eVMcCulloh 1976
0.51397.3 [NH2]- (g) → NH2 (g) ΔrH°(0 K) = 0.779 ± 0.037 eVCelotta 1974
0.54982.13 C6H6 (g) → C6H5 (g) + H (g) ΔrH°(0 K) = 111.02 ± 0.60 kcal/molKarton 2009a

Top 10 species with enthalpies of formation correlated to the ΔfH° of [NH2]- (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
69.8 Phenide[C6H5]- (g)c1cccc[c-]1244.32230.90± 0.39kJ/mol77.1044 ±
0.0048		30922-78-2*0
32.5 PhenylC6H5 (g)c1cccc[c]1350.35336.99± 0.53kJ/mol77.1039 ±
0.0048		2396-01-2*0
28.0 AmidogenNH2 (g)[NH2]188.91186.02± 0.11kJ/mol16.02262 ±
0.00016		13770-40-6*0
27.8 Azanylium[NH2]+ (g)[NH2+]1266.551264.48± 0.11kJ/mol16.02207 ±
0.00016		15194-15-7*0
26.8 Vinyl anion[CH2CH]- (g)C=[CH-]237.00232.58± 0.82kJ/mol27.0458 ±
0.0016		25012-81-1*0
23.2 Methylamidogen anion[CH3NH]- (g)C[NH-]145.17134.35± 0.66kJ/mol30.04975 ±
0.00085		54448-39-4*0
17.7 p-Chlorophenide[C6H4Cl]- (g)c1(Cl)cc[c-]cc1179.1168.7± 1.5kJ/mol111.5492 ±
0.0049		77748-42-6*0
17.5 o-Chlorophenide[C6H4Cl]- (g)c1(Cl)[c-]cccc1158.2148.3± 1.6kJ/mol111.5492 ±
0.0049		72863-53-7*0
17.5 m-Chlorophenide[C6H4Cl]- (g)c1(Cl)c[c-]ccc1172.1161.9± 1.6kJ/mol111.5492 ±
0.0049		77748-34-6*0
13.5 o-ChlorophenylC6H4Cl (g)c1(Cl)[c]cccc1327.1316.4± 1.6kJ/mol111.5487 ±
0.0049		3474-42-8*0

Most Influential reactions involving [NH2]- (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
0.7074991.1 C6H6 (g) + [NH2]- (g) → [C6H5]- (g) + NH3 (g) ΔrG°(300 K) = -3.557 ± 0.047 kcal/molDavico 1995
0.6042072.1 [CH2CH]- (g) + NH3 (g) → [NH2]- (g) + CH2CH2 (g) ΔrG°(298.15 K) = -4.54 ± 0.24 kcal/molErvin 1990
0.5222181.1 CH3NH2 (g) + [NH2]- (g) → [CH3NH]- (g) + NH3 (g) ΔrG°(296 K) = -0.51 ± 0.20 kcal/molMacKay 1976, note unc2
0.3391397.1 [NH2]- (g) → NH2 (g) ΔrH°(0 K) = 0.771 ± 0.005 eVWickham-Jones 1989
0.2351398.11 [NH2]- (g) → NH2 (g) ΔrH°(0 K) = 0.773 ± 0.006 eVFeller 2016, note unc2
0.1913990.5 [(CH3)2N]- (g) + NH2 (g) → (CH3)2N (g) + [NH2]- (g) ΔrH°(0 K) = -0.232 ± 0.025 eVRuscic W1RO
0.1534991.3 C6H6 (g) + [NH2]- (g) → [C6H5]- (g) + NH3 (g) ΔrG°(300 K) = -3.618 ± 0.101 kcal/molDavico 1995
0.1333990.2 [(CH3)2N]- (g) + NH2 (g) → (CH3)2N (g) + [NH2]- (g) ΔrH°(0 K) = -0.226 ± 0.030 eVRuscic G4
0.1004991.2 C6H6 (g) + [NH2]- (g) → [C6H5]- (g) + NH3 (g) ΔrG°(300 K) = -3.557 ± 0.125 kcal/molDavico 1995
0.0841397.4 [NH2]- (g) → NH2 (g) ΔrH°(0 K) = 0.768 ± 0.010 eVRadisic 2002
0.0621404.4 [NH2]- (g) + H2 (g) → H- (g) + NH3 (g) ΔrG°(296 K) = -1.916 ± 0.272 (×1.022) kcal/molBohme 1973, MacKay 1976, note unc2
0.0593990.4 [(CH3)2N]- (g) + NH2 (g) → (CH3)2N (g) + [NH2]- (g) ΔrH°(0 K) = -0.216 ± 0.045 eVRuscic CBS-n
0.0301404.2 [NH2]- (g) + H2 (g) → H- (g) + NH3 (g) ΔrG°(297 K) = -1.945 ± 0.400 kcal/molBohme 1973, note unc2
0.0171398.10 [NH2]- (g) → NH2 (g) ΔrH°(0 K) = 0.770 ± 0.022 eVBoese 2004
0.0143990.1 [(CH3)2N]- (g) + NH2 (g) → (CH3)2N (g) + [NH2]- (g) ΔrH°(0 K) = -0.145 ± 0.045 (×2) eVRuscic G3X
0.0143990.3 [(CH3)2N]- (g) + NH2 (g) → (CH3)2N (g) + [NH2]- (g) ΔrH°(0 K) = -0.143 ± 0.050 (×1.834) eVRuscic CBS-n
0.0131397.2 [NH2]- (g) → NH2 (g) ΔrH°(0 K) = 0.744 ± 0.022 (×1.139) eVSmyth 1972
0.0061398.9 [NH2]- (g) → NH2 (g) ΔrH°(0 K) = 0.769 ± 0.035 eVParthiban 2001
0.0061397.3 [NH2]- (g) → NH2 (g) ΔrH°(0 K) = 0.779 ± 0.037 eVCelotta 1974
0.0051403.1 NH3 (g) → [NH2]- (g) + H+ (g) ΔrH°(0 K) = 402.47 ± 0.90 kcal/molRuscic W1RO, Ruscic W1U
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.