Selected ATcT [1, 2] enthalpy of formation based on version 1.156 of the Thermochemical Network [3]

This version of ATcT results[3] was generated by additional expansion of version 1.148 to include species relevant to a recent study of the oxidation of ethylene [4] as well as new measurements that led to refining the thermochemistry of CF and SiF and their cations [5].

Propylene cation

Formula: [CH3CHCH2]+ (g)

CAS RN: 34504-10-4

ATcT ID: 34504-10-4*0

SMILES: CC=[CH2+]

InChI: InChI=1S/C3H6/c1-3-2/h3H,1H2,2H3/q+1

InChIKey: WSHMEDZDSQSLKJ-UHFFFAOYSA-N

Hills Formula: C3H6+

2D Image:

Aliases: [CH3CHCH2]+; Propylene cation; Propylene ion (1+); 1-Propylene cation; 1-Propylene ion (1+); 1-Propene cation; 1-Propene ion (1+); Propene cation; Propene ion (1+); Methylethylene cation; Methylethylene ion (1+); CH3CHCH2+; [CH2CHCH3]+; CH2CHCH3+

Relative Molecular Mass: 42.0792 ± 0.0024

Δ_fH°(0 K)	Δ_fH°(298.15 K)	Uncertainty	Units
975.20	961.67	± 0.18	kJ/mol

3D Image of [CH3CHCH2]+ (g)

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Top contributors to the provenance of Δ_fH° of [CH3CHCH2]+ (g)

The 20 contributors listed below account only for 40.9% of the provenance of Δ_fH° of [CH3CHCH2]+ (g).
A total of 687 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
11.5	3258.1	CH3CHCH2 (g) + H2 (g) → CH3CH2CH3 (g)	Δ_rH°(355.15 K) = -30.122 ± 0.060 kcal/mol	Kistiakowsky 1935a
5.1	3257.1	CH3CHCH2 (g) + 9/2 O2 (g) → 3 CO2 (g) + 3 H2O (cr,l)	Δ_rH°(298.15 K) = -2057.72 ± 0.62 kJ/mol	Rossini 1937
4.0	2359.1	2 H2 (g) + C (graphite) → CH4 (g)	Δ_rG°(1165 K) = 37.521 ± 0.068 kJ/mol	Smith 1946, note COf, 3rd Law
3.3	125.2	1/2 O2 (g) + H2 (g) → H2O (cr,l)	Δ_rH°(298.15 K) = -285.8261 ± 0.040 kJ/mol	Rossini 1939, Rossini 1931, Rossini 1931b, note H2Oa, Rossini 1930
1.3	2214.7	C (graphite) + O2 (g) → CO2 (g)	Δ_rH°(298.15 K) = -393.464 ± 0.024 kJ/mol	Hawtin 1966, note CO2e
1.3	3267.12	CH2(CH2CH2) (g) → CH3CHCH2 (g)	Δ_rH°(0 K) = -8.76 ± 0.2 kcal/mol	Allen 2016, est unc
1.3	3260.14	CH3CHCH2 (g) + CH3CH3 (g) → CH3CH2CH3 (g) + CH2CH2 (g)	Δ_rH°(0 K) = 11.35 ± 0.8 kJ/mol	Ferguson 2013, est unc
1.2	3260.11	CH3CHCH2 (g) + CH3CH3 (g) → CH3CH2CH3 (g) + CH2CH2 (g)	Δ_rH°(0 K) = 2.72 ± 0.20 kcal/mol	Karton 2009b, Karton 2011
1.0	3724.6	CH3CHCHCH3 (g, trans) + CH2CH2 (g) → 2 CH3CHCH2 (g)	Δ_rH°(0 K) = -0.78 ± 2.00 kJ/mol	Klippenstein 2017
1.0	3765.8	CH2CHCHCH2 (g) + CH3CH3 (g) → 2 CH3CHCH2 (g)	Δ_rH°(0 K) = 12.89 ± 2.00 kJ/mol	Klippenstein 2017
1.0	3253.11	CH3CHCH2 (g) → 3 C (g) + 6 H (g)	Δ_rH°(0 K) = 811.53 ± 0.30 kcal/mol	Karton 2009b, Karton 2011
1.0	3427.11	CH2CCH2 (g) + CH3CH3 (g) → CH3CHCH2 (g) + CH2CH2 (g)	Δ_rH°(0 K) = -8.02 ± 0.20 kcal/mol	Karton 2009b, Karton 2011
1.0	3419.13	CH3CCH (g) + CH2CH2 (g) → CH3CHCH2 (g) + HCCH (g)	Δ_rH°(0 K) = 10.57 ± 0.8 kJ/mol	Ferguson 2013, est unc
1.0	3259.4	CH3CHCH2 (g) + 2 HI (g) → CH3CH2CH3 (g) + I2 (g)	Δ_rG°(597 K) = -5.79 ± 0.20 kcal/mol	Nangia 1964, Nangia 1964a, 3rd Law, est unc
0.9	3765.7	CH2CHCHCH2 (g) + CH3CH3 (g) → 2 CH3CHCH2 (g)	Δ_rH°(0 K) = 2.94 ± 0.50 kcal/mol	Wheeler 2004, est unc
0.9	3210.1	CH3CH2CH3 (g) + 5 O2 (g) → 3 CO2 (g) + 4 H2O (cr,l)	Δ_rH°(298.15 K) = -2219.15 ± 0.46 (×1.091) kJ/mol	Pittam 1972
0.9	3419.11	CH3CCH (g) + CH2CH2 (g) → CH3CHCH2 (g) + HCCH (g)	Δ_rH°(0 K) = 2.30 ± 0.20 kcal/mol	Karton 2011
0.8	3336.1	[CH2CHCH2]- (g) → CH2CHCH2 (g)	Δ_rH°(0 K) = 0.481 ± 0.008 eV	Wenthold 1996
0.7	2252.11	CO (g) → C (g) + O (g)	Δ_rH°(0 K) = 1071.92 ± 0.10 (×1.242) kJ/mol	Thorpe 2021
0.7	3257.2	CH3CHCH2 (g) + 9/2 O2 (g) → 3 CO2 (g) + 3 H2O (cr,l)	Δ_rH°(298.15 K) = -491.83 ± 0.39 kcal/mol	Wiberg 1968

Top 10 species with enthalpies of formation correlated to the Δ_fH° of [CH3CHCH2]+ (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	Δ_fH°(0 K)	Δ_fH°(298.15 K)	Uncertainty	Units	Relative Molecular Mass	ATcT ID
99.9	Propene	CH3CHCH2 (g)	34.91	20.07	± 0.18	kJ/mol	42.0797 ± 0.0024	115-07-1*0
81.4	Allyl anion	[CH2CHCH2]- (g)	134.02	123.01	± 0.21	kJ/mol	41.0723 ± 0.0024	1724-46-5*0
60.1	Propane	CH3CH2CH3 (g)	-82.71	-104.99	± 0.15	kJ/mol	44.0956 ± 0.0025	74-98-6*0
47.3	n-Butane	CH3CH2CH2CH3 (g)	-98.23	-125.54	± 0.19	kJ/mol	58.1222 ± 0.0033	106-97-8*0
46.5	Ethane	CH3CH3 (g)	-68.38	-84.01	± 0.12	kJ/mol	30.0690 ± 0.0017	74-84-0*0
43.7	Ethylene	CH2CH2 (g)	60.91	52.40	± 0.11	kJ/mol	28.0532 ± 0.0016	74-85-1*0
43.6	Ethylene cation	[CH2CH2]+ (g)	1075.22	1068.01	± 0.11	kJ/mol	28.0526 ± 0.0016	34470-02-5*0
38.7	iso-Propylium	[CH3CHCH3]+ (g)	822.99	805.91	± 0.23	kJ/mol	43.0871 ± 0.0024	19252-53-0*0
37.2	Carbonic acid	C(O)(OH)2 (aq, undissoc)		-698.670	± 0.028	kJ/mol	62.0248 ± 0.0012	463-79-6*1000
36.4	Propyne	CH3CCH (g)	192.72	185.57	± 0.21	kJ/mol	40.0639 ± 0.0024	74-99-7*0

Most Influential reactions involving [CH3CHCH2]+ (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
0.999	3254.1	CH3CHCH2 (g) → [CH3CHCH2]+ (g)	Δ_rH°(0 K) = 78602.0 ± 0.4 cm-1	Vasilatou 2010, Vasilatou 2011
0.085	3268.8	[CH2(CH2CH2)]+ (g) → [CH3CHCH2]+ (g)	Δ_rH°(0 K) = -11.20 ± 1.2 kcal/mol	Ruscic W1RO
0.072	3268.7	[CH2(CH2CH2)]+ (g) → [CH3CHCH2]+ (g)	Δ_rH°(0 K) = -9.85 ± 1.3 kcal/mol	Ruscic CBS-n
0.072	3268.4	[CH2(CH2CH2)]+ (g) → [CH3CHCH2]+ (g)	Δ_rH°(0 K) = -10.86 ± 1.3 kcal/mol	Ruscic G4
0.062	3268.3	[CH2(CH2CH2)]+ (g) → [CH3CHCH2]+ (g)	Δ_rH°(0 K) = -11.13 ± 1.4 kcal/mol	Ruscic G3X
0.048	3268.6	[CH2(CH2CH2)]+ (g) → [CH3CHCH2]+ (g)	Δ_rH°(0 K) = -10.50 ± 1.6 kcal/mol	Ruscic CBS-n
0.005	4919.6	CH3CH2CH2CH2OH (g) → [CH3CHCH2]+ (g) + CH3OH (g)	Δ_rH°(0 K) = 10.690 ± 0.040 eV	Ruscic W1RO
0.001	4919.3	CH3CH2CH2CH2OH (g) → [CH3CHCH2]+ (g) + CH3OH (g)	Δ_rH°(0 K) = 10.683 ± 0.073 eV	Ruscic G4
0.001	4919.2	CH3CH2CH2CH2OH (g) → [CH3CHCH2]+ (g) + CH3OH (g)	Δ_rH°(0 K) = 10.711 ± 0.093 eV	Ruscic G3X
0.000	4919.4	CH3CH2CH2CH2OH (g) → [CH3CHCH2]+ (g) + CH3OH (g)	Δ_rH°(0 K) = 10.737 ± 0.099 eV	Ruscic CBS-n
0.000	4919.5	CH3CH2CH2CH2OH (g) → [CH3CHCH2]+ (g) + CH3OH (g)	Δ_rH°(0 K) = 10.773 ± 0.075 (×1.354) eV	Ruscic CBS-n
0.000	3254.2	CH3CHCH2 (g) → [CH3CHCH2]+ (g)	Δ_rH°(0 K) = 78587 ± 4 (×3.748) cm-1	Burrill 2001
0.000	3254.3	CH3CHCH2 (g) → [CH3CHCH2]+ (g)	Δ_rH°(0 K) = 9.744 ± 0.003 eV	Masclet 1973
0.000	3254.4	CH3CHCH2 (g) → [CH3CHCH2]+ (g)	Δ_rH°(0 K) = 9.73 ± 0.01 (×1.542) eV	Krassig 1974
0.000	3254.5	CH3CHCH2 (g) → [CH3CHCH2]+ (g)	Δ_rH°(0 K) = 9.73 ± 0.02 eV	Wood 1979
0.000	3254.15	CH3CHCH2 (g) → [CH3CHCH2]+ (g)	Δ_rH°(0 K) = 9.740 ± 0.040 eV	Ruscic W1RO
0.000	3254.6	CH3CHCH2 (g) → [CH3CHCH2]+ (g)	Δ_rH°(0 K) = 9.73 ± 0.05 eV	Traeger 1984, est unc
0.000	3254.7	CH3CHCH2 (g) → [CH3CHCH2]+ (g)	Δ_rH°(0 K) = 9.72 ± 0.05 eV	Katrib 1973a, est unc
0.000	3254.11	CH3CHCH2 (g) → [CH3CHCH2]+ (g)	Δ_rH°(0 K) = 9.747 ± 0.073 eV	Ruscic G4
0.000	3254.14	CH3CHCH2 (g) → [CH3CHCH2]+ (g)	Δ_rH°(0 K) = 9.794 ± 0.075 eV	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. 1.156 of the Thermochemical Network (2024); available at ATcT.anl.gov
4		N. A. Seifert, B. Ruscic, R. Sivaramakrishnan, and K. Prozument, The C2H4O Isomers in the Oxidation of Ethylene J. Mol. Spectrosc. 398, 111847/1-8 (2023) [DOI: 10.1016/j.jms.2023.111847]
5		U. Jacovella, B. Ruscic, N. L. Chen, H.-L. Le, S. Boyé-Péronne, S. Hartweg, M. Roy-Chowdhury, G. A. Garcia, J.-C. Loison, and B. Gans, Refining Thermochemical Properties of CF, SiF, and Their Cations by Combining Photoelectron Spectroscopy, Quantum Chemical Calculations, and the Active Thermochemical Tables Approach Phys. Chem. Chem. Phys. 25, 30838-30847 (2023) [DOI: 10.1039/D3CP04244H]
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]
7		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] and Ruscic and Bross[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.