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].

2-Hydroxyethyl

Formula: CH2CH2OH (g, gauche-anti)

CAS RN: 4422-54-2

ATcT ID: 4422-54-2*2

SMILES: [CH2]CO

InChI: InChI=1S/C2H5O/c1-2-3/h3H,1-2H2

InChIKey: HVFGPIFTSJJAKK-UHFFFAOYSA-N

Hills Formula: C2H5O1

2D Image:

Aliases: CH2CH2OH; 2-Hydroxyethyl; 2-Hydroxyethyl radical; beta-Hydroxyethyl; beta-Hydroxyethyl radical

Relative Molecular Mass: 45.0605 ± 0.0017

Δ_fH°(0 K)	Δ_fH°(298.15 K)	Uncertainty	Units
-11.01	-23.64	± 0.93	kJ/mol

3D Image of CH2CH2OH (g, gauche-anti)

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Top contributors to the provenance of Δ_fH° of CH2CH2OH (g, gauche-anti)

The 20 contributors listed below account only for 75.7% of the provenance of Δ_fH° of CH2CH2OH (g, gauche-anti).
A total of 62 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
12.9	3924.9	CH2CH2OH (g, gauche-syn) → CH2CH2OH (g, gauche-anti)	Δ_rH°(0 K) = 0.52 ± 0.50 kcal/mol	Matus 2007, est unc
7.5	3921.9	CH2CH2OH (g, gauche-anti) → 2 C (g) + 5 H (g) + O (g)	Δ_rH°(0 K) = 659.73 ± 0.80 kcal/mol	Matus 2007
5.0	3924.7	CH2CH2OH (g, gauche-syn) → CH2CH2OH (g, gauche-anti)	Δ_rH°(0 K) = 194 ± 280 cm-1	Ruscic CBS-n
4.5	3944.8	CH3CHOH (g, gauche-anti) → CH2CH2OH (g, gauche-anti)	Δ_rH°(0 K) = 2640 ± 315 cm-1	Ruscic W1RO
4.4	3924.8	CH2CH2OH (g, gauche-syn) → CH2CH2OH (g, gauche-anti)	Δ_rH°(0 K) = 133 ± 300 cm-1	Ruscic W1RO
4.1	3924.4	CH2CH2OH (g, gauche-syn) → CH2CH2OH (g, gauche-anti)	Δ_rH°(0 K) = 131 ± 310 cm-1	Ruscic G4
4.0	3924.3	CH2CH2OH (g, gauche-syn) → CH2CH2OH (g, gauche-anti)	Δ_rH°(0 K) = 174 ± 315 cm-1	Ruscic G3X
3.7	3944.4	CH3CHOH (g, gauche-anti) → CH2CH2OH (g, gauche-anti)	Δ_rH°(0 K) = 2574 ± 350 cm-1	Ruscic G4
3.7	3944.7	CH3CHOH (g, gauche-anti) → CH2CH2OH (g, gauche-anti)	Δ_rH°(0 K) = 2824 ± 350 cm-1	Ruscic CBS-n
3.2	3924.6	CH2CH2OH (g, gauche-syn) → CH2CH2OH (g, gauche-anti)	Δ_rH°(0 K) = 152 ± 350 cm-1	Ruscic CBS-n
3.0	3944.3	CH3CHOH (g, gauche-anti) → CH2CH2OH (g, gauche-anti)	Δ_rH°(0 K) = 2574 ± 385 cm-1	Ruscic G3X
2.9	3945.8	CH3CHOH (g, gauche-syn) → CH2CH2OH (g, gauche-anti)	Δ_rH°(0 K) = 2530 ± 315 cm-1	Ruscic W1RO
2.3	3931.7	CH2CH2OH (g, gauche-anti) → [CH2CH2OH]+ (g, staggered-anti)	Δ_rH°(0 K) = 10.672 ± 0.040 eV	Ruscic W1RO
2.3	3945.7	CH3CHOH (g, gauche-syn) → CH2CH2OH (g, gauche-anti)	Δ_rH°(0 K) = 2697 ± 350 cm-1	Ruscic CBS-n
2.3	3945.4	CH3CHOH (g, gauche-syn) → CH2CH2OH (g, gauche-anti)	Δ_rH°(0 K) = 2444 ± 350 cm-1	Ruscic G4
2.2	3926.3	CH2CH2OH (g, gauche-anti) → CH2CH2OH (g, staggered-anti)	Δ_rH°(0 K) = 404 ± 280 cm-1	Ruscic CBS-n
2.1	3944.6	CH3CHOH (g, gauche-anti) → CH2CH2OH (g, gauche-anti)	Δ_rH°(0 K) = 2699 ± 455 cm-1	Ruscic CBS-n
1.9	3945.3	CH3CHOH (g, gauche-syn) → CH2CH2OH (g, gauche-anti)	Δ_rH°(0 K) = 2450 ± 385 cm-1	Ruscic G3X
1.4	3926.1	CH2CH2OH (g, gauche-anti) → CH2CH2OH (g, staggered-anti)	Δ_rH°(0 K) = 347 ± 350 cm-1	Ruscic G3
1.3	3945.6	CH3CHOH (g, gauche-syn) → CH2CH2OH (g, gauche-anti)	Δ_rH°(0 K) = 2549 ± 455 cm-1	Ruscic CBS-n

Top 10 species with enthalpies of formation correlated to the Δ_fH° of CH2CH2OH (g, gauche-anti)

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
35.0	2-Hydroxyethyl	CH2CH2OH (g, gauche-syn)	-13.07	-26.33	± 0.49	kJ/mol	45.0605 ± 0.0017	4422-54-2*1
35.0	2-Hydroxyethyl	CH2CH2OH (g)	-13.07	-26.33	± 0.49	kJ/mol	45.0605 ± 0.0017	4422-54-2*0
30.7	1-Hydroxyethyl	CH3CHOH (g, gauche-syn)	-41.50	-54.97	± 0.92	kJ/mol	45.0605 ± 0.0017	2348-46-1*2
29.5	2-Hydroxyethyl	CH2CH2OH (g, staggered-anti)	-6.0	-18.4	± 1.5	kJ/mol	45.0605 ± 0.0017	4422-54-2*3
25.5	1-Hydroxyethyl	CH3CHOH (g)	-42.87	-56.30	± 0.46	kJ/mol	45.0605 ± 0.0017	2348-46-1*0
25.5	1-Hydroxyethyl	CH3CHOH (g, gauche-anti)	-42.87	-56.30	± 0.46	kJ/mol	45.0605 ± 0.0017	2348-46-1*1
22.6	2-Hydroxyethylium	[CH2CH2OH]+ (g, staggered-anti)	1019.1	1006.3	± 1.5	kJ/mol	45.0600 ± 0.0017	38607-31-7*3
22.6	2-Hydroxyethylium	[CH2CH2OH]+ (g)	1019.1	1007.0	± 1.5	kJ/mol	45.0600 ± 0.0017	38607-31-7*0
15.1	Ethanol	CH3CH2OH (g)	-217.31	-235.03	± 0.20	kJ/mol	46.0684 ± 0.0017	64-17-5*0
14.9	Ethanol	CH3CH2OH (cr,l)	-269.74	-277.50	± 0.20	kJ/mol	46.0684 ± 0.0017	64-17-5*500

Most Influential reactions involving CH2CH2OH (g, gauche-anti)

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
0.186	3926.3	CH2CH2OH (g, gauche-anti) → CH2CH2OH (g, staggered-anti)	Δ_rH°(0 K) = 404 ± 280 cm-1	Ruscic CBS-n
0.177	3924.9	CH2CH2OH (g, gauche-syn) → CH2CH2OH (g, gauche-anti)	Δ_rH°(0 K) = 0.52 ± 0.50 kcal/mol	Matus 2007, est unc
0.157	3931.7	CH2CH2OH (g, gauche-anti) → [CH2CH2OH]+ (g, staggered-anti)	Δ_rH°(0 K) = 10.672 ± 0.040 eV	Ruscic W1RO
0.119	3926.1	CH2CH2OH (g, gauche-anti) → CH2CH2OH (g, staggered-anti)	Δ_rH°(0 K) = 347 ± 350 cm-1	Ruscic G3
0.082	3945.8	CH3CHOH (g, gauche-syn) → CH2CH2OH (g, gauche-anti)	Δ_rH°(0 K) = 2530 ± 315 cm-1	Ruscic W1RO
0.076	3921.9	CH2CH2OH (g, gauche-anti) → 2 C (g) + 5 H (g) + O (g)	Δ_rH°(0 K) = 659.73 ± 0.80 kcal/mol	Matus 2007
0.069	3924.7	CH2CH2OH (g, gauche-syn) → CH2CH2OH (g, gauche-anti)	Δ_rH°(0 K) = 194 ± 280 cm-1	Ruscic CBS-n
0.066	3945.7	CH3CHOH (g, gauche-syn) → CH2CH2OH (g, gauche-anti)	Δ_rH°(0 K) = 2697 ± 350 cm-1	Ruscic CBS-n
0.066	3945.4	CH3CHOH (g, gauche-syn) → CH2CH2OH (g, gauche-anti)	Δ_rH°(0 K) = 2444 ± 350 cm-1	Ruscic G4
0.060	3926.2	CH2CH2OH (g, gauche-anti) → CH2CH2OH (g, staggered-anti)	Δ_rH°(0 K) = 387 ± 490 cm-1	Ruscic CBS-n
0.060	3924.8	CH2CH2OH (g, gauche-syn) → CH2CH2OH (g, gauche-anti)	Δ_rH°(0 K) = 133 ± 300 cm-1	Ruscic W1RO
0.059	3944.8	CH3CHOH (g, gauche-anti) → CH2CH2OH (g, gauche-anti)	Δ_rH°(0 K) = 2640 ± 315 cm-1	Ruscic W1RO
0.056	3924.4	CH2CH2OH (g, gauche-syn) → CH2CH2OH (g, gauche-anti)	Δ_rH°(0 K) = 131 ± 310 cm-1	Ruscic G4
0.055	3945.3	CH3CHOH (g, gauche-syn) → CH2CH2OH (g, gauche-anti)	Δ_rH°(0 K) = 2450 ± 385 cm-1	Ruscic G3X
0.054	3924.3	CH2CH2OH (g, gauche-syn) → CH2CH2OH (g, gauche-anti)	Δ_rH°(0 K) = 174 ± 315 cm-1	Ruscic G3X
0.048	3944.4	CH3CHOH (g, gauche-anti) → CH2CH2OH (g, gauche-anti)	Δ_rH°(0 K) = 2574 ± 350 cm-1	Ruscic G4
0.048	3944.7	CH3CHOH (g, gauche-anti) → CH2CH2OH (g, gauche-anti)	Δ_rH°(0 K) = 2824 ± 350 cm-1	Ruscic CBS-n
0.047	3931.3	CH2CH2OH (g, gauche-anti) → [CH2CH2OH]+ (g, staggered-anti)	Δ_rH°(0 K) = 10.709 ± 0.073 eV	Ruscic G4
0.044	3931.6	CH2CH2OH (g, gauche-anti) → [CH2CH2OH]+ (g, staggered-anti)	Δ_rH°(0 K) = 10.649 ± 0.075 eV	Ruscic CBS-n
0.044	3924.6	CH2CH2OH (g, gauche-syn) → CH2CH2OH (g, gauche-anti)	Δ_rH°(0 K) = 152 ± 350 cm-1	Ruscic CBS-n

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. 1.130 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.