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].

Bromide

Formula: Br- (aq)
CAS RN: 24959-67-9
ATcT ID: 24959-67-9*800
SMILES: [Br-]
InChI: InChI=1S/BrH/h1H/p-1
InChIKey: CPELXLSAUQHCOX-UHFFFAOYSA-M
InChI: InChI=1S/Br/q-1
InChIKey: FXWOFHDSFFRUFQ-UHFFFAOYSA-N
Hills Formula: Br1-

2D Image:

[Br-]
Aliases: Br-; Bromide; Bromide ion; Bromide anion; Bromide ion (1-); Perbromide; Perbromide ion; Perbromide anion; Perbromide ion (1-); Bromine atom cation; Bromine atom ion (1-); Bromine cation; Bromine ion (1-); Atomic bromine cation; Atomic bromine ion (1-); Monobromine cation; Monobromine ion (1-)
Relative Molecular Mass: 79.90455 ± 0.00100

   ΔfH°(0 K)   ΔfH°(298.15 K)UncertaintyUnits
-120.50± 0.13kJ/mol

Top contributors to the provenance of ΔfH° of Br- (aq)

The 20 contributors listed below account only for 76.7% of the provenance of ΔfH° of Br- (aq).
A total of 86 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
22.29413.1 S(O)(OH)2 (aq, 2500 H2O) Br2 (cr,l) H2O (cr,l) → OS(O)(OH)2 (aq, 2500 H2O) + 2 HBr (aq, 1250 H2O) ΔrH°(298.15 K) = -55.47 ± 0.11 kcal/molJohnson 1963
12.31200.1 [HBr]+ (g) → H (g) Br+ (g) ΔrH°(0 K) = 31394.5 ± 20 cm-1Haugh 1971, Norling 1935
8.21099.2 Br2 (cr,l) → Br2 (g) ΔrH°(298.15 K) = 7.386 ± 0.027 kcal/molHildenbrand 1958
7.71133.1 HBr (aq, 3000 H2O) → HBr (aq) ΔrH°(298.15 K) = -0.239 ± 0.040 kJ/molNBS Tables 1989, Parker 1965, NBS TN270
5.61129.1 HBr (g) → HBr (aq, 2570 H2O) ΔrH°(298.15 K) = -20.286 ± 0.012 kcal/molVanderzee 1963
2.41200.3 [HBr]+ (g) → H (g) Br+ (g) ΔrH°(0 K) = 31358 ± 15 (×3.018) cm-1Penno 1998, Norling 1935, est unc
2.31126.1 1/2 H2 (g) + 1/2 Br2 (cr,l) → HBr (aq) ΔrG°(298.15 K) = -102.81 ± 0.80 kJ/molJones 1934, as quoted by CODATA Key Vals
2.01190.1 Cl2 (g) + 2 Br- (aq) → Br2 (cr,l) + 2 Cl- (aq) ΔrH°(298.15 K) = -91.29 ± 0.40 (×4.269) kJ/molJohnson 1963, as quoted by CODATA Key Vals
2.01190.2 Cl2 (g) + 2 Br- (aq) → Br2 (cr,l) + 2 Cl- (aq) ΔrH°(298.15 K) = -91.29 ± 0.80 (×2.134) kJ/molSunner 1964, as quoted by CODATA Key Vals
1.56200.1 CH3Br (g) → [CH3]+ (g) Br (g) ΔrH°(0 K) = 12.834 ± 0.002 (×2.538) eVSong 2001
1.51190.3 Cl2 (g) + 2 Br- (aq) → Br2 (cr,l) + 2 Cl- (aq) ΔrH°(298.15 K) = -91.55 ± 2.00 kJ/molThomsen 1882, as quoted by CODATA Key Vals
1.41346.1 Br2 (cr,l) + 3 I- (aq) → [I3]- (aq) + 2 Br- (aq) ΔrH°(298.15 K) = -29.355 ± 0.364 kcal/molWu 1963
1.03089.2 HCO (g) HBr (g) → CH2O (g) Br (g) ΔrG°(385 K) = 6.79 ± 0.64 (×1.297) kJ/molBecerra 1997, Nava 1981, 3rd Law, note unc
1.01117.12 HBr (g) → H (g) Br (g) ΔrH°(0 K) = 86.47 ± 0.2 kcal/molFeller 2008
1.01118.6 HBr (g) Cl (g) → HCl (g) Br (g) ΔrH°(0 K) = -15.68 ± 0.2 kcal/molFeller 2008
1.01290.1 HI (g) Br (g) → HBr (g) I (g) ΔrH°(0 K) = -16.14 ± 0.2 kcal/molFeller 2008
0.86202.3 CH3Br (g) HBr (g) → Br2 (g) CH4 (g) ΔrG°(712.2 K) = 35.8 ± 1.6 kJ/molFerguson 1973, 3rd Law
0.86531.1 CH3CH2Br (g) → [CH3CH2]+ (g) Br (g) ΔrH°(0 K) = 11.130 ± 0.005 eVBaer 2000
0.72385.1 CH4 (g) Br (g) → CH3 (g) HBr (g) ΔrH°(0 K) = 5929 ± 80 cm-1Czako 2013
0.62035.2 [ON(O)O]- (g) HBr (g) → Br- (g) HON(O)O (g) ΔrH°(391 K) = -1.03 ± 0.21 kcal/molDavidson 1977, 2nd Law

Top 10 species with enthalpies of formation correlated to the ΔfH° of Br- (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 Image    ΔfH°(0 K)    ΔfH°(298.15 K) Uncertainty Units Relative
Molecular
Mass
ATcT ID
100.0 Hydrogen bromideHBr (aq)Br-120.50± 0.13kJ/mol80.9119 ±
0.0010
10035-10-6*800
94.7 Hydrogen bromideHBr (aq, 3000 H2O)Br-120.26± 0.12kJ/mol80.9119 ±
0.0010
10035-10-6*842
94.7 Hydrogen bromideHBr (aq, 200 H2O)Br-119.75± 0.12kJ/mol80.9119 ±
0.0010
10035-10-6*830
94.7 Hydrogen bromideHBr (aq, 75 H2O)Br-119.36± 0.12kJ/mol80.9119 ±
0.0010
10035-10-6*825
94.7 Hydrogen bromideHBr (aq, 7000 H2O)Br-120.34± 0.12kJ/mol80.9119 ±
0.0010
10035-10-6*846
94.7 Hydrogen bromideHBr (aq, 50 H2O)Br-119.11± 0.12kJ/mol80.9119 ±
0.0010
10035-10-6*822
94.7 Hydrogen bromideHBr (aq, 30 H2O)Br-118.59± 0.12kJ/mol80.9119 ±
0.0010
10035-10-6*820
94.7 Hydrogen bromideHBr (aq, 5000 H2O)Br-120.31± 0.12kJ/mol80.9119 ±
0.0010
10035-10-6*844
94.7 Hydrogen bromideHBr (aq, 600 H2O)Br-120.01± 0.12kJ/mol80.9119 ±
0.0010
10035-10-6*834
94.7 Hydrogen bromideHBr (aq, 300 H2O)Br-119.86± 0.12kJ/mol80.9119 ±
0.0010
10035-10-6*831

Most Influential reactions involving Br- (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
1.0001125.1 HBr (aq) → H+ (aq) Br- (aq) ΔrH°(298.15 K) = 0.000 ± 0.000 kcal/moltriv
0.9991198.1 Br2 (aq) Br- (aq) → [Br3]- (aq) ΔrG°(298.15 K) = -7.150 ± 0.025 kJ/molMussini 1966, as quoted by CODATA Key Vals
0.7861719.5 (NH4)Br (cr) → [NH4]+ (aq) Br- (aq) ΔrG°(298.15 K) = -7.849 ± 0.040 kJ/molCODATA Key Vals
0.2721346.1 Br2 (cr,l) + 3 I- (aq) → [I3]- (aq) + 2 Br- (aq) ΔrH°(298.15 K) = -29.355 ± 0.364 kcal/molWu 1963
0.1991719.3 (NH4)Br (cr) → [NH4]+ (aq) Br- (aq) ΔrG°(298.15 K) = -1.883 ± 0.019 kcal/molShults 1966, Stephenson 1968, est unc
0.0211190.1 Cl2 (g) + 2 Br- (aq) → Br2 (cr,l) + 2 Cl- (aq) ΔrH°(298.15 K) = -91.29 ± 0.40 (×4.269) kJ/molJohnson 1963, as quoted by CODATA Key Vals
0.0211190.2 Cl2 (g) + 2 Br- (aq) → Br2 (cr,l) + 2 Cl- (aq) ΔrH°(298.15 K) = -91.29 ± 0.80 (×2.134) kJ/molSunner 1964, as quoted by CODATA Key Vals
0.0151190.3 Cl2 (g) + 2 Br- (aq) → Br2 (cr,l) + 2 Cl- (aq) ΔrH°(298.15 K) = -91.55 ± 2.00 kJ/molThomsen 1882, as quoted by CODATA Key Vals
0.0041719.2 (NH4)Br (cr) → [NH4]+ (aq) Br- (aq) ΔrH°(298.15 K) = 4.007 ± 0.015 (×8.175) kcal/molStephenson 1968
0.0041719.4 (NH4)Br (cr) → [NH4]+ (aq) Br- (aq) ΔrH°(298.15 K) = 4.01 ± 0.10 (×1.242) kcal/molParker 1965, as quoted by CODATA Key Vals
0.0001198.2 Br2 (aq) Br- (aq) → [Br3]- (aq) ΔrH°(298.15 K) = -7.53 ± 0.30 (×3.748) kJ/molVasilev 1973, as quoted by CODATA Key Vals


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. 1.156 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.