Selected ATcT [1, 2] enthalpy of formation based on version 1.176 of the Thermochemical Network [3]

This version of ATcT results[3] was generated by additional expansion of version 1.172 to include species related to Criegee intermediates that are involved in several ongoing studies[4].

Triiodide

Formula: [I3]- (aq)

CAS RN: 14900-04-0

ATcT ID: 14900-04-0*800

SMILES: I[I-]I

InChI: InChI=1S/I3/c1-3-2/q-1

InChIKey: WRTMQOHKMFDUKX-UHFFFAOYSA-N

Hills Formula: I3-

2D Image:

Aliases: [I3]-; Triiodide; Triiodide ion; Triiodide anion; Periodide; Triiodine anion; Triiodine ion (1-); Iodine trimer anion; Iodine trimer ion (1-); Triatomic iodide ion; Triatomic iodide anion

Relative Molecular Mass: 380.713959 ± 0.000090

Δ_fH°(0 K)	Δ_fH°(298.15 K)	Uncertainty	Units
	-51.53	± 0.79	kJ/mol

Top contributors to the provenance of Δ_fH° of [I3]- (aq)

The 9 contributors listed below account for 90.4% of the provenance of Δ_fH° of [I3]- (aq).

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
51.6	1357.1	I2 (cr,l) + I- (aq) → [I3]- (aq)	Δ_rH°(298.15 K) = 1.338 ± 0.256 kcal/mol	Wu 1963
21.8	1356.1	Br2 (cr,l) + 3 I- (aq) → [I3]- (aq) + 2 Br- (aq)	Δ_rH°(298.15 K) = -29.355 ± 0.364 kcal/mol	Wu 1963
4.3	2133.1	2 [NNN]- (aq) + [I3]- (aq) → 3 N2 (g) + 3 I- (aq)	Δ_rH°(298.15 K) = -158.78 ± 0.2 kcal/mol	Gray 1956
3.9	1304.1	HI (g) → HI (aq, 5130 H2O)	Δ_rH°(298.15 K) = -19.862 ± 0.020 kcal/mol	Vanderzee 1974
3.0	2112.11	HNNN (g) → H (g) + 3 N (g)	Δ_rH°(0 K) = 318.06 ± 0.30 kcal/mol	Karton 2011
2.5	1358.1	Cl2 (g) + 3 I- (aq) → 2 Cl- (aq) + [I3]- (aq)	Δ_rH°(298.15 K) = -51.5 ± 1.1 kcal/mol	Wartenberg 1930, Wartenberg 1931, Parker 1965
1.0	2130.2	HNNN (g) → HNNN (aq, undissoc)	Δ_rG°(298.15 K) = -1.5 ± 0.1 kcal/mol	D'Orazio 1963, as quoted by NBS Tables
1.0	2130.1	HNNN (g) → HNNN (aq, undissoc)	Δ_rH°(298.15 K) = -8.1 ± 0.1 kcal/mol	D'Orazio 1963, as quoted by NBS Tables
0.9	2119.1	HNNN (g) → 1/2 H2 (g) + 3/2 N2 (g)	Δ_rH°(285.6 K) = -70.3 ± 0.5 (×1.091) kcal/mol	Gunther 1935, apud Gurvich TPIS, as quoted by NBS Tables

Top 10 species with enthalpies of formation correlated to the Δ_fH° of [I3]- (aq)

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
22.4	Hydrogen iodide	HI (aq)		-56.825	± 0.090	kJ/mol	127.912410 ± 0.000076	10034-85-2*800
22.4	Iodide	I- (aq)		-56.825	± 0.090	kJ/mol	126.905019 ± 0.000030	20461-54-5*800
22.1	Hydrogen iodide	HI (aq, 5000 H2O)		-56.641	± 0.090	kJ/mol	127.912410 ± 0.000076	10034-85-2*844
-25.7	Hydrazoic acid cation	[HNNN]+ (g)	1333.73	1328.06	± 0.82	kJ/mol	43.02761 ± 0.00022	58852-14-5*0
-29.4	Azido radical	NNN (g)	452.38	449.79	± 0.59	kJ/mol	42.02022 ± 0.00021	12596-60-0*0
-34.8	Hydrazoic acid	HNNN (cr,l)		261.57	± 0.64	kJ/mol	43.02816 ± 0.00022	7782-79-8*500
-46.1	Hydrazoic acid	HNNN (g)	297.99	291.69	± 0.48	kJ/mol	43.02816 ± 0.00022	7782-79-8*0
-55.9	Hydrazoic acid	HNNN (aq, undissoc)		257.70	± 0.48	kJ/mol	43.02816 ± 0.00022	7782-79-8*1000
-59.1	Hydrazoic acid	HNNN (aq)		272.69	± 0.47	kJ/mol	43.02816 ± 0.00022	7782-79-8*800
-59.1	Azide	[NNN]- (aq)		272.69	± 0.47	kJ/mol	42.02077 ± 0.00021	14343-69-2*800

Most Influential reactions involving [I3]- (aq)

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
0.810	2133.1	2 [NNN]- (aq) + [I3]- (aq) → 3 N2 (g) + 3 I- (aq)	Δ_rH°(298.15 K) = -158.78 ± 0.2 kcal/mol	Gray 1956
0.523	1357.1	I2 (cr,l) + I- (aq) → [I3]- (aq)	Δ_rH°(298.15 K) = 1.338 ± 0.256 kcal/mol	Wu 1963
0.271	1356.1	Br2 (cr,l) + 3 I- (aq) → [I3]- (aq) + 2 Br- (aq)	Δ_rH°(298.15 K) = -29.355 ± 0.364 kcal/mol	Wu 1963
0.028	1358.1	Cl2 (g) + 3 I- (aq) → 2 Cl- (aq) + [I3]- (aq)	Δ_rH°(298.15 K) = -51.5 ± 1.1 kcal/mol	Wartenberg 1930, Wartenberg 1931, Parker 1965
0.004	661.2	FOF (g) + 2 H+ (aq) + 6 I- (aq) → 2 [I3]- (aq) + 2 F- (aq) + H2O (cr,l)	Δ_rH°(298.15 K) = -171.6 ± 5.2 (×1.114) kcal/mol	Wartenberg 1930, Wartenberg 1931, Parker 1965

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. 1.176 of the Thermochemical Network (2024); available at ATcT.anl.gov
4		T. L. Nguyen et al, ongoing studies (2024)
5		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]
6		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 [5] and Ruscic and Bross[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.