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].

Hypobromite

Formula: [BrO]- (g)

CAS RN: 14380-62-2

ATcT ID: 14380-62-2*0

SMILES: [O-]Br

SMILES: Br[O-]

InChI: InChI=1S/BrO/c1-2/q-1

InChIKey: JGJLWPGRMCADHB-UHFFFAOYSA-N

Hills Formula: Br1O1-

2D Image:

Aliases: [BrO]-; Hypobromite; Hypobromite ion; Hypobromite anion; Hypobromite ion (1-); Oxygen bromide anion; Oxygen bromide ion (1-); Oxygen monobromide anion; Oxygen monobromide ion (1-); Bromine monoxide anion; Bromine monoxide ion (1-); BrO-; [OBr]-; OBr-

Relative Molecular Mass: 95.9039 ± 0.0010

Δ_fH°(0 K)	Δ_fH°(298.15 K)	Uncertainty	Units
-95.99	-103.47	± 0.53	kJ/mol

3D Image of [BrO]- (g)

spin ON spin OFF

Top contributors to the provenance of Δ_fH° of [BrO]- (g)

The 18 contributors listed below account for 90.5% of the provenance of Δ_fH° of [BrO]- (g).

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
51.0	1228.1	[BrO]- (g) → BrO (g)	Δ_rH°(0 K) = 2.353 ± 0.006 eV	Gilles 1992
9.8	1231.1	[BrO]- (g) → Br- (g) + O (g)	Δ_rH°(0 K) = 32.46 ± 0.4 kcal/mol	Peterson 2006
7.0	1225.9	BrO (g) → Br (g) + O (g)	Δ_rH°(0 K) = 19551 ± 35 cm-1	Kim 2006
6.1	1228.2	[BrO]- (g) → BrO (g)	Δ_rH°(0 K) = 54.02 ± 0.4 kcal/mol	Peterson 2006
3.1	1382.2	[IO]- (g) + Br- (g) → [BrO]- (g) + I- (g)	Δ_rH°(0 K) = 6.00 ± 0.6 kcal/mol	Peterson 2006
1.3	1225.7	BrO (g) → Br (g) + O (g)	Δ_rH°(0 K) = 19532 ± 80 cm-1	Fleischmann 2004, est unc
1.3	1225.8	BrO (g) → Br (g) + O (g)	Δ_rH°(0 K) = 19482 ± 80 cm-1	Fleischmann 2004, est unc
1.3	953.1	OClO (g) + Br (g) → BrO (g) + ClO (g)	Δ_rG°(298.15 K) = 6.80 ± 0.86 kJ/mol	Clyne 1977, 3rd Law
1.2	1263.4	HOBr (g) + [OH]- (g) → H2O (g) + [BrO]- (g)	Δ_rH°(0 K) = -33.62 ± 1.0 kcal/mol	Ruscic G4
1.2	1265.4	HOBr (g) + [ClO]- (g) → HOCl (g) + [BrO]- (g)	Δ_rH°(0 K) = -0.90 ± 1.0 kcal/mol	Ruscic G4
1.1	1264.4	HOBr (g) + [FO]- (g) → HOF (g) + [BrO]- (g)	Δ_rH°(0 K) = -4.87 ± 1.0 kcal/mol	Ruscic G4
0.9	1108.2	Br2 (cr,l) → Br2 (g)	Δ_rH°(298.15 K) = 7.386 ± 0.027 kcal/mol	Hildenbrand 1958
0.8	1264.3	HOBr (g) + [FO]- (g) → HOF (g) + [BrO]- (g)	Δ_rH°(0 K) = -5.61 ± 1.2 kcal/mol	Ruscic G3X
0.7	1263.3	HOBr (g) + [OH]- (g) → H2O (g) + [BrO]- (g)	Δ_rH°(0 K) = -35.79 ± 1.2 (×1.044) kcal/mol	Ruscic G3X
0.7	1226.7	BrO (g) → Br (g) + O (g)	Δ_rH°(0 K) = 55.80 ± 0.3 kcal/mol	Feller 2008
0.7	1233.2	BrO (g) + Cl (g) → ClO (g) + Br (g)	Δ_rH°(0 K) = -7.45 ± 0.3 kcal/mol	Feller 2008
0.7	1265.3	HOBr (g) + [ClO]- (g) → HOCl (g) + [BrO]- (g)	Δ_rH°(0 K) = -1.25 ± 1.2 (×1.067) kcal/mol	Ruscic G3X
0.7	1232.1	BrO (g) + F (g) → FO (g) + Br (g)	Δ_rH°(0 K) = 4.78 ± 0.3 kcal/mol	Feller 2008

Top 10 species with enthalpies of formation correlated to the Δ_fH° of [BrO]- (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
42.1	Bromooxidanyl	BrO (g)	131.22	123.68	± 0.28	kJ/mol	95.9034 ± 0.0010	15656-19-6*0
13.1	Hypobromous acid	HOBr (g)	-51.27	-61.75	± 0.48	kJ/mol	96.9113 ± 0.0010	13517-11-8*0
11.6	Hypobromous acid cation	[HOBr]+ (g)	975.25	964.63	± 0.54	kJ/mol	96.9108 ± 0.0010	154804-02-1*0
10.1	Bromide	Br- (g)	-206.612	-212.674	± 0.055	kJ/mol	79.90455 ± 0.00100	24959-67-9*0
10.1	Dibromine	Br2 (g)	45.70	30.90	± 0.11	kJ/mol	159.8080 ± 0.0020	7726-95-6*0
10.1	Bromine atom	Br (g, 2P1/2)	162.010	155.947	± 0.055	kJ/mol	79.90400 ± 0.00100	10097-32-2*2
10.1	Bromine atom	Br (g, 2P3/2)	117.925	111.863	± 0.055	kJ/mol	79.90400 ± 0.00100	10097-32-2*1
10.1	Bromine atom	Br (g)	117.925	111.863	± 0.055	kJ/mol	79.90400 ± 0.00100	10097-32-2*0
10.1	Bromanylium	Br+ (g)	1257.786	1251.723	± 0.056	kJ/mol	79.90345 ± 0.00100	22541-56-6*0
9.7	Bromo hypobromite	BrOBr (g)	121.1	104.6	± 1.2	kJ/mol	175.8074 ± 0.0020	21308-80-5*0

Most Influential reactions involving [BrO]- (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
0.699	1228.1	[BrO]- (g) → BrO (g)	Δ_rH°(0 K) = 2.353 ± 0.006 eV	Gilles 1992
0.151	1382.2	[IO]- (g) + Br- (g) → [BrO]- (g) + I- (g)	Δ_rH°(0 K) = 6.00 ± 0.6 kcal/mol	Peterson 2006
0.099	1231.1	[BrO]- (g) → Br- (g) + O (g)	Δ_rH°(0 K) = 32.46 ± 0.4 kcal/mol	Peterson 2006
0.083	1228.2	[BrO]- (g) → BrO (g)	Δ_rH°(0 K) = 54.02 ± 0.4 kcal/mol	Peterson 2006
0.037	1264.4	HOBr (g) + [FO]- (g) → HOF (g) + [BrO]- (g)	Δ_rH°(0 K) = -4.87 ± 1.0 kcal/mol	Ruscic G4
0.026	1264.3	HOBr (g) + [FO]- (g) → HOF (g) + [BrO]- (g)	Δ_rH°(0 K) = -5.61 ± 1.2 kcal/mol	Ruscic G3X
0.025	1265.4	HOBr (g) + [ClO]- (g) → HOCl (g) + [BrO]- (g)	Δ_rH°(0 K) = -0.90 ± 1.0 kcal/mol	Ruscic G4
0.025	1263.4	HOBr (g) + [OH]- (g) → H2O (g) + [BrO]- (g)	Δ_rH°(0 K) = -33.62 ± 1.0 kcal/mol	Ruscic G4
0.022	1264.5	HOBr (g) + [FO]- (g) → HOF (g) + [BrO]- (g)	Δ_rH°(0 K) = -5.46 ± 1.3 kcal/mol	Ruscic CBS-n
0.016	1263.3	HOBr (g) + [OH]- (g) → H2O (g) + [BrO]- (g)	Δ_rH°(0 K) = -35.79 ± 1.2 (×1.044) kcal/mol	Ruscic G3X
0.015	1265.3	HOBr (g) + [ClO]- (g) → HOCl (g) + [BrO]- (g)	Δ_rH°(0 K) = -1.25 ± 1.2 (×1.067) kcal/mol	Ruscic G3X
0.015	1265.5	HOBr (g) + [ClO]- (g) → HOCl (g) + [BrO]- (g)	Δ_rH°(0 K) = -0.45 ± 1.3 kcal/mol	Ruscic CBS-n
0.011	1254.6	HOBr (g) → H+ (g) + [BrO]- (g)	Δ_rH°(0 K) = 354.8 ± 1.5 kcal/mol	McNeill 2022
0.008	1263.5	HOBr (g) + [OH]- (g) → H2O (g) + [BrO]- (g)	Δ_rH°(0 K) = -36.23 ± 1.3 (×1.297) kcal/mol	Ruscic CBS-n
0.007	1230.6	[BrO]- (g) → Br (g) + O (g)	Δ_rH°(0 K) = 109.6 ± 1.5 kcal/mol	McNeill 2022
0.006	1254.4	HOBr (g) → H+ (g) + [BrO]- (g)	Δ_rH°(0 K) = 354.74 ± 2.00 kcal/mol	Ruscic G4
0.004	1228.7	[BrO]- (g) → BrO (g)	Δ_rH°(0 K) = 2.426 ± 0.061 (×1.189) eV	Ruscic G4
0.004	1254.5	HOBr (g) → H+ (g) + [BrO]- (g)	Δ_rH°(0 K) = 354.61 ± 2.30 kcal/mol	Ruscic CBS-n
0.004	1254.3	HOBr (g) → H+ (g) + [BrO]- (g)	Δ_rH°(0 K) = 354.28 ± 2.42 kcal/mol	Ruscic G3X
0.004	1382.1	[IO]- (g) + Br- (g) → [BrO]- (g) + I- (g)	Δ_rH°(0 K) = 32.0 ± 15 kJ/mol	Hassanzadeh 1997, est unc

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.