Bromine
- Formula: Br2
- Molecular weight: 159.808
- IUPAC Standard InChIKey: GDTBXPJZTBHREO-UHFFFAOYSA-N
- CAS Registry Number: 7726-95-6
- Chemical structure:
This structure is also available as a 2d Mol file or as a computed 3d SD file
The 3d structure may be viewed using Java or Javascript. - Other names: Br2; Brom; Brome; Bromo; Broom; UN 1744; Dibromine
- Permanent link for this species. Use this link for bookmarking this species for future reference.
- Information on this page:
- Other data available:
- Reaction thermochemistry data: reactions 51 to 55
- Gas phase ion energetics data
- Ion clustering data
- Constants of diatomic molecules
- Data at other public NIST sites:
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Gas phase thermochemistry data
Go To: Top, Condensed phase thermochemistry data, Phase change data, Reaction thermochemistry data, Mass spectrum (electron ionization), References, Notes
Data compilation copyright by the U.S. Secretary of Commerce on behalf of the U.S.A. All rights reserved.
Quantity | Value | Units | Method | Reference | Comment |
---|---|---|---|---|---|
ΔfH°gas | 7.388 ± 0.026 | kcal/mol | Review | Cox, Wagman, et al., 1984 | CODATA Review value |
ΔfH°gas | 7.388 | kcal/mol | Review | Chase, 1998 | Data last reviewed in June, 1982 |
Quantity | Value | Units | Method | Reference | Comment |
S°gas,1 bar | 58.668 ± 0.001 | cal/mol*K | Review | Cox, Wagman, et al., 1984 | CODATA Review value |
S°gas,1 bar | 58.647 | cal/mol*K | Review | Chase, 1998 | Data last reviewed in June, 1982 |
Gas Phase Heat Capacity (Shomate Equation)
Cp° = A + B*t + C*t2 + D*t3 +
E/t2
H° − H°298.15= A*t + B*t2/2 +
C*t3/3 + D*t4/4 − E/t + F − H
S° = A*ln(t) + B*t + C*t2/2 + D*t3/3 −
E/(2*t2) + G
Cp = heat capacity (cal/mol*K)
H° = standard enthalpy (kcal/mol)
S° = standard entropy (cal/mol*K)
t = temperature (K) / 1000.
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Temperature (K) | 332.503 to 3400. | 3400. to 6000. |
---|---|---|
A | 9.208229 | 8.363500 |
B | -0.472475 | 2.211341 |
C | 0.364748 | -0.564433 |
D | -0.047418 | 0.036887 |
E | -0.044411 | -10.29550 |
F | 4.511521 | -1.784841 |
G | 69.66690 | 65.39921 |
H | 7.387670 | 7.387670 |
Reference | Chase, 1998 | Chase, 1998 |
Comment | Data last reviewed in June, 1982 | Data last reviewed in June, 1982 |
Condensed phase thermochemistry data
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Data compilation copyright by the U.S. Secretary of Commerce on behalf of the U.S.A. All rights reserved.
Quantity | Value | Units | Method | Reference | Comment |
---|---|---|---|---|---|
S°liquid | 36.379 ± 0.072 | cal/mol*K | Review | Cox, Wagman, et al., 1984 | CODATA Review value |
Phase change data
Go To: Top, Gas phase thermochemistry data, Condensed phase thermochemistry data, Reaction thermochemistry data, Mass spectrum (electron ionization), References, Notes
Data compilation copyright by the U.S. Secretary of Commerce on behalf of the U.S.A. All rights reserved.
Data compiled as indicated in comments:
TRC - Thermodynamics Research Center, NIST Boulder Laboratories, Chris Muzny director
AC - William E. Acree, Jr., James S. Chickos
Quantity | Value | Units | Method | Reference | Comment |
---|---|---|---|---|---|
Tfus | 266.0 | K | N/A | Weber, 1912 | Uncertainty assigned by TRC = 0.3 K; TRC |
Tfus | 254.15 | K | N/A | Serullas, 1827 | Uncertainty assigned by TRC = 10. K; TRC |
Enthalpy of vaporization
ΔvapH (kcal/mol) | Temperature (K) | Method | Reference | Comment |
---|---|---|---|---|
7.12 | 358. | N/A | Blair and Ihle, 1973 | Based on data from 343. to 383. K.; AC |
7.48 | 312. | N/A | Fischer and Bingle, 1955 | Based on data from 297. to 389. K.; AC |
4.21 | 206. | C | Giauque and Wiebe, 1928 | AC |
Antoine Equation Parameters
log10(P) = A − (B / (T + C))
P = vapor pressure (atm)
T = temperature (K)
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Temperature (K) | A | B | C | Reference | Comment |
---|---|---|---|---|---|
343. to 383. | 4.70256 | 1562.264 | 0.628 | Blair and Ihle, 1973 | Coefficents calculated by NIST from author's data. |
224.5 to 331.4 | 2.93958 | 638.258 | -115.144 | Stull, 1947 | Coefficents calculated by NIST from author's data. |
Reaction thermochemistry data
Go To: Top, Gas phase thermochemistry data, Condensed phase thermochemistry data, Phase change data, Mass spectrum (electron ionization), References, Notes
Data compilation copyright by the U.S. Secretary of Commerce on behalf of the U.S.A. All rights reserved.
Data compiled as indicated in comments:
MS - José A. Martinho Simões
B - John E. Bartmess
ALS - Hussein Y. Afeefy, Joel F. Liebman, and Stephen E. Stein
Note: Please consider using the reaction search for this species. This page allows searching of all reactions involving this species. A general reaction search form is also available. Future versions of this site may rely on reaction search pages in place of the enumerated reaction displays seen below.
Reactions 1 to 50
C8H6MoO3 (cr) + (solution) = (solution) + (cr)
By formula: C8H6MoO3 (cr) + Br2 (solution) = HBr (solution) + C8H5BrMoO3 (cr)
Quantity | Value | Units | Method | Reference | Comment |
---|---|---|---|---|---|
ΔrH° | -35.8 ± 2.8 | kcal/mol | N/A | Nolan, López de la Vega, et al., 1986 | solvent: Carbon tetrachloride; The reaction enthalpy was calculated Nolan, López de la Vega, et al., 1986 from the experimental values for the enthalpies of the following reactions: Mo(Cp)(CO)3(H)(cr) + 2Br2(solution) = Mo(Cp)(CO)2(Br)3(solution) + HBr(solution) + CO(solution), -60.7 ± 2.0 kcal/mol, and Mo(Cp)(CO)3(Br)(cr) + Br2(solution) = Mo(Cp)(CO)2(Br)3(solution) + CO(solution), -24.9 ± 2.0 kcal/mol; MS |
C16H10Mo2O6 (cr) + (solution) = 2 (cr)
By formula: C16H10Mo2O6 (cr) + Br2 (solution) = 2C8H5BrMoO3 (cr)
Quantity | Value | Units | Method | Reference | Comment |
---|---|---|---|---|---|
ΔrH° | -42.2 ± 4.1 | kcal/mol | N/A | Nolan, López de la Vega, et al., 1986 | solvent: Carbon tetrachloride; The reaction enthalpy was calculated Nolan, López de la Vega, et al., 1986 from the experimental values for the enthalpies of the following reactions: [Mo(Cp)(CO)3]2(cr) + 3Br2(solution) = 2Mo(Cp)(CO)2(Br)3(solution) + 2CO(solution), -92.0 ± 1.0 kcal/mol, and Mo(Cp)(CO)3(Br)(cr) + Br2(solution) = Mo(Cp)(CO)2(Br)3(solution) + CO(solution), -24.9 ± 2.0 kcal/mol; MS |
By formula: Br- + Br2 = (Br- • Br2)
Quantity | Value | Units | Method | Reference | Comment |
---|---|---|---|---|---|
ΔrH° | 30.4 ± 1.7 | kcal/mol | CIDT | Nizzi, Pommerening, et al., 1998 | gas phase; B |
ΔrH° | 33.70 | kcal/mol | N/A | Check, Faust, et al., 2001 | gas phase; Fe-; ; ΔS(EA)=5.8; B |
Quantity | Value | Units | Method | Reference | Comment |
ΔrG° | 22.50 | kcal/mol | N/A | Check, Faust, et al., 2001 | gas phase; Fe-; ; ΔS(EA)=5.8; B |
By formula: C4H8 + Br2 = C4H8Br2
Quantity | Value | Units | Method | Reference | Comment |
---|---|---|---|---|---|
ΔrH° | -28.90 | kcal/mol | Cm | Lister, 1941 | gas phase; Heat of bromination at 300 K; ALS |
ΔrH° | -29.44 ± 0.20 | kcal/mol | Cm | Conn, Kistiakowsky, et al., 1938 | gas phase; Reanalyzed by Cox and Pilcher, 1970, Original value = -29.59 ± 0.20 kcal/mol; At 355 °K; ALS |
By formula: C4H8 + Br2 = C4H8Br2
Quantity | Value | Units | Method | Reference | Comment |
---|---|---|---|---|---|
ΔrH° | -28.95 ± 0.20 | kcal/mol | Cm | Conn, Kistiakowsky, et al., 1938 | gas phase; Reanalyzed by Cox and Pilcher, 1970, Original value = -29.08 ± 0.20 kcal/mol; At 355 °K; ALS |
By formula: C2H4 + Br2 = C2H4Br2
Quantity | Value | Units | Method | Reference | Comment |
---|---|---|---|---|---|
ΔrH° | -28.90 ± 0.30 | kcal/mol | Cm | Conn, Kistiakowsky, et al., 1938 | gas phase; Reanalyzed by Cox and Pilcher, 1970, Original value = -29.06 ± 0.30 kcal/mol; At 355 °K; ALS |
By formula: C3H6 + Br2 = C3H6Br2
Quantity | Value | Units | Method | Reference | Comment |
---|---|---|---|---|---|
ΔrH° | -29.27 ± 0.20 | kcal/mol | Cm | Conn, Kistiakowsky, et al., 1938 | gas phase; Reanalyzed by Cox and Pilcher, 1970, Original value = -29.41 ± 0.20 kcal/mol; At 355 °K; ALS |
By formula: HBr + C7H7Br = C7H8 + Br2
Quantity | Value | Units | Method | Reference | Comment |
---|---|---|---|---|---|
ΔrH° | 8.1 ± 1.0 | kcal/mol | Eqk | Benson and Buss, 1957 | gas phase; Reanalyzed by Cox and Pilcher, 1970, Original value = 8.0 ± 0.9 kcal/mol; ALS |
Quantity | Value | Units | Method | Reference | Comment |
---|---|---|---|---|---|
ΔrH° | 8.10 ± 0.10 | kcal/mol | Eqk | Dunning and Pritchard, 1972 | gas phase; ALS |
ΔrH° | 1.0 ± 0.1 | kcal/mol | Eqk | Schumacher and Bergmann, 1931 | gas phase; ALS |
(l) + 3 (l) = Br3In (cr) + 3 (g)
By formula: C3H9In (l) + 3Br2 (l) = Br3In (cr) + 3CH3Br (g)
Quantity | Value | Units | Method | Reference | Comment |
---|---|---|---|---|---|
ΔrH° | -159.0 ± 1.0 | kcal/mol | RSC | Clarke and Price, 1968 | Please also see Pedley and Rylance, 1977 and Cox and Pilcher, 1970, 2.; MS |
By formula: C2H6Hg (l) + 2Br2 (l) = 2CH3Br (g) + Br2Hg (cr)
Quantity | Value | Units | Method | Reference | Comment |
---|---|---|---|---|---|
ΔrH° | -72.20 ± 0.60 | kcal/mol | RSC | Hartley, Pritchard, et al., 1950 | Please also see Pedley and Rylance, 1977 and Cox and Pilcher, 1970, 2.; MS |
(l) + (g) = (l) + C3H9BrSn (l)
By formula: C10H16Sn (l) + Br2 (g) = C7H7Br (l) + C3H9BrSn (l)
Quantity | Value | Units | Method | Reference | Comment |
---|---|---|---|---|---|
ΔrH° | -54.2 ± 0.2 | kcal/mol | RSC | Pedley and Skinner, 1959 | Please also see Pedley and Rylance, 1977 and Cox and Pilcher, 1970, 2.; MS |
(l) + (g) = C3H9BrSn (l) + (g)
By formula: C4H12Sn (l) + Br2 (g) = C3H9BrSn (l) + CH3Br (g)
Quantity | Value | Units | Method | Reference | Comment |
---|---|---|---|---|---|
ΔrH° | -48.30 ± 0.69 | kcal/mol | RSC | Pedley, Skinner, et al., 1957 | Please also see Pedley and Rylance, 1977 and Cox and Pilcher, 1970, 2.; MS |
C8H6MoO3 (cr) + 2 (solution) = C7H5Br3MoO2 (solution) + (solution) + (solution)
By formula: C8H6MoO3 (cr) + 2Br2 (solution) = C7H5Br3MoO2 (solution) + HBr (solution) + CO (solution)
Quantity | Value | Units | Method | Reference | Comment |
---|---|---|---|---|---|
ΔrH° | -60.7 ± 2.0 | kcal/mol | RSC | Nolan, López de la Vega, et al., 1986 | solvent: Carbon tetrachloride; MS |
By formula: C3H4O4 + Br2 = HBr + C3H3BrO4
Quantity | Value | Units | Method | Reference | Comment |
---|---|---|---|---|---|
ΔrH° | -15.8 ± 0.69 | kcal/mol | Cm | Koros, Orban, et al., 1979 | liquid phase; solvent: Sulfuric acid (1M); Bromination; ALS |
(l) + (l) = 2C3H9BrSn (l)
By formula: C6H18Sn2 (l) + Br2 (l) = 2C3H9BrSn (l)
Quantity | Value | Units | Method | Reference | Comment |
---|---|---|---|---|---|
ΔrH° | -70.24 ± 0.50 | kcal/mol | RSC | Pedley, Skinner, et al., 1957 | Please also see Pedley and Rylance, 1977 and Cox and Pilcher, 1970, 2.; MS |
C16H10Mo2O6 (cr) + 3 (solution) = 2C7H5Br3MoO2 (solution) + 2 (solution)
By formula: C16H10Mo2O6 (cr) + 3Br2 (solution) = 2C7H5Br3MoO2 (solution) + 2CO (solution)
Quantity | Value | Units | Method | Reference | Comment |
---|---|---|---|---|---|
ΔrH° | -92.0 ± 1.0 | kcal/mol | RSC | Nolan, López de la Vega, et al., 1986 | solvent: Carbon tetrachloride; MS |
By formula: HBr + C3H5BrO = C3H6O + Br2
Quantity | Value | Units | Method | Reference | Comment |
---|---|---|---|---|---|
ΔrH° | 7.4 ± 2.0 | kcal/mol | Eqk | King, Golden, et al., 1971 | gas phase; Heat of bromination at 516-618 K; ALS |
(cr) + (solution) = C7H5Br3MoO2 (solution) + (solution)
By formula: C8H5BrMoO3 (cr) + Br2 (solution) = C7H5Br3MoO2 (solution) + CO (solution)
Quantity | Value | Units | Method | Reference | Comment |
---|---|---|---|---|---|
ΔrH° | -24.9 ± 2.0 | kcal/mol | RSC | Nolan, López de la Vega, et al., 1986 | solvent: Carbon tetrachloride; MS |
C12H7MnO5 (cr) + 1.5 (g) = (g) + (cr) + 5 (g)
By formula: C12H7MnO5 (cr) + 1.5Br2 (g) = C7H7Br (g) + Br2Mn (cr) + 5CO (g)
Quantity | Value | Units | Method | Reference | Comment |
---|---|---|---|---|---|
ΔrH° | -46.5 ± 1.9 | kcal/mol | HAL-HFC | Connor, Zafarani-Moattar, et al., 1982 | MS |
By formula: Br2 + C8H14 = C8H14Br2
Quantity | Value | Units | Method | Reference | Comment |
---|---|---|---|---|---|
ΔrH° | -29.310 | kcal/mol | Cm | Lister, 1941 | gas phase; Heat of bromination at 300 K; ALS |
C6F3MnO5 (cr) + 1.5 (g) = (cr) + 5 (g) + (g)
By formula: C6F3MnO5 (cr) + 1.5Br2 (g) = Br2Mn (cr) + 5CO (g) + CBrF3 (g)
Quantity | Value | Units | Method | Reference | Comment |
---|---|---|---|---|---|
ΔrH° | -41.3 ± 0.7 | kcal/mol | HAL-HFC | Connor, Zafarani-Moattar, et al., 1982 | MS |
C7F3MnO6 (cr) + 1.5 (g) = (cr) + 6 (g) + (g)
By formula: C7F3MnO6 (cr) + 1.5Br2 (g) = Br2Mn (cr) + 6CO (g) + CBrF3 (g)
Quantity | Value | Units | Method | Reference | Comment |
---|---|---|---|---|---|
ΔrH° | -38.6 ± 0.5 | kcal/mol | HAL-HFC | Connor, Zafarani-Moattar, et al., 1982 | MS |
By formula: C6H10 + Br2 = C6H10Br2
Quantity | Value | Units | Method | Reference | Comment |
---|---|---|---|---|---|
ΔrH° | -33.630 | kcal/mol | Cm | Lister, 1941 | gas phase; Heat of bromination at 300 K; ALS |
By formula: C7H12 + Br2 = C7H12Br2
Quantity | Value | Units | Method | Reference | Comment |
---|---|---|---|---|---|
ΔrH° | -30.44 | kcal/mol | Cm | Lister, 1941 | gas phase; Heat of bromination at 300 K; ALS |
+ = C7H14Br2
By formula: C7H14 + Br2 = C7H14Br2
Quantity | Value | Units | Method | Reference | Comment |
---|---|---|---|---|---|
ΔrH° | -30.24 | kcal/mol | Cm | Lister, 1941 | gas phase; Heat of bromination at 300 K; ALS |
By formula: C5H8 + Br2 = C5H8Br2
Quantity | Value | Units | Method | Reference | Comment |
---|---|---|---|---|---|
ΔrH° | -28.61 ± 0.60 | kcal/mol | Cm | Lister, 1941 | gas phase; Halogenation at 27 C; ALS |
(cr) + 1.5 (g) = (cr) + 5 (g) + (g)
By formula: C6H3MnO5 (cr) + 1.5Br2 (g) = Br2Mn (cr) + 5CO (g) + CH3Br (g)
Quantity | Value | Units | Method | Reference | Comment |
---|---|---|---|---|---|
ΔrH° | -50.0 ± 0.7 | kcal/mol | HAL-HFC | Connor, Zafarani-Moattar, et al., 1982 | MS |
(cr) + 1.5 (g) = (cr) + 6 (g) + (g)
By formula: C7H3MnO6 (cr) + 1.5Br2 (g) = Br2Mn (cr) + 6CO (g) + CH3Br (g)
Quantity | Value | Units | Method | Reference | Comment |
---|---|---|---|---|---|
ΔrH° | -38. ± 1. | kcal/mol | HAL-HFC | Connor, Zafarani-Moattar, et al., 1982 | MS |
By formula: C7H7Br + 0.5H2 = C7H8 + 0.5Br2
Quantity | Value | Units | Method | Reference | Comment |
---|---|---|---|---|---|
ΔrH° | -0.9 ± 0.5 | kcal/mol | Chyd | Ashcroft, Carson, et al., 1963 | liquid phase; ALS |
C10H22Mg (cr) + (g) + (l) = 2 (l) + Br2Mg (cr)
By formula: C10H22Mg (cr) + H2 (g) + Br2 (l) = 2C5H12 (l) + Br2Mg (cr)
Quantity | Value | Units | Method | Reference | Comment |
---|---|---|---|---|---|
ΔrH° | -160.0 ± 1.6 | kcal/mol | RSC | Akkerman, Schat, et al., 1983 | MS |
By formula: C2F4 + Br2 = C2Br2F4
Quantity | Value | Units | Method | Reference | Comment |
---|---|---|---|---|---|
ΔrH° | -38.48 | kcal/mol | Cm | Lacher, Casali, et al., 1956 | gas phase; Heat of bromination; ALS |
By formula: 2C6H5Br + Br2Hg = C12H10Hg + 2Br2
Quantity | Value | Units | Method | Reference | Comment |
---|---|---|---|---|---|
ΔrH° | 78.53 ± 0.80 | kcal/mol | Cm | Chernick, Skinner, et al., 1956 | liquid phase; ALS |
(cr) + 2 (g) = 2 (cr) + 10 (g)
By formula: C10Mn2O10 (cr) + 2Br2 (g) = 2Br2Mn (cr) + 10CO (g)
Quantity | Value | Units | Method | Reference | Comment |
---|---|---|---|---|---|
ΔrH° | -63.0 ± 2.0 | kcal/mol | HAL-HFC | Connor, Zafarani-Moattar, et al., 1982 | MS |
By formula: H2 + 2CH3Br = 2CH4 + Br2
Quantity | Value | Units | Method | Reference | Comment |
---|---|---|---|---|---|
ΔrH° | -6.6 ± 0.6 | kcal/mol | Chyd | Adams, Carson, et al., 1966 | liquid phase; ALS |
By formula: C4H8 + Br2 = C4H8Br2
Quantity | Value | Units | Method | Reference | Comment |
---|---|---|---|---|---|
ΔrH° | -30.18 ± 0.20 | kcal/mol | Cm | Conn, Kistiakowsky, et al., 1938 | gas phase; At 355 °K; ALS |
By formula: C5H10 + Br2 = C5H10Br2
Quantity | Value | Units | Method | Reference | Comment |
---|---|---|---|---|---|
ΔrH° | -30.40 ± 0.20 | kcal/mol | Cm | Conn, Kistiakowsky, et al., 1938 | gas phase; At 355 °K; ALS |
By formula: C5H6O4 + Br2 = C5H6O4 + Br2
Quantity | Value | Units | Method | Reference | Comment |
---|---|---|---|---|---|
ΔrH° | -1.2 ± 0.2 | kcal/mol | Eqk | Jwo, Huang, et al., 1987 | solid phase; HPLC; ALS |
By formula: Br2 + C2ClF3 = C2Br2ClF3
Quantity | Value | Units | Method | Reference | Comment |
---|---|---|---|---|---|
ΔrH° | -31.61 | kcal/mol | Cm | Lacher, Casali, et al., 1956 | gas phase; Heat of bromination; ALS |
By formula: Br3- + Br2 = (Br3- • Br2)
Quantity | Value | Units | Method | Reference | Comment |
---|---|---|---|---|---|
ΔrH° | 9.1 ± 1.7 | kcal/mol | CIDT | Nizzi, Pommerening, et al., 1998 | gas phase; B |
By formula: C5BrMnO5 (cr) + 0.5Br2 (g) = Br2Mn (cr) + 5CO (g)
Quantity | Value | Units | Method | Reference | Comment |
---|---|---|---|---|---|
ΔrH° | 2.4 ± 0.43 | kcal/mol | HAL-HFC | Connor, Zafarani-Moattar, et al., 1982 | MS |
By formula: H2 + 2C2H5Br = 2C2H6 + Br2
Quantity | Value | Units | Method | Reference | Comment |
---|---|---|---|---|---|
ΔrH° | 5.6 ± 3.0 | kcal/mol | Chyd | Ashcroft, Carson, et al., 1965 | liquid phase; ALS |
By formula: CHCl3 + Br2 = HBr + CBrCl3
Quantity | Value | Units | Method | Reference | Comment |
---|---|---|---|---|---|
ΔrH° | -1.4 ± 0.1 | kcal/mol | Eqk | Mendenhall, Golden, et al., 1973 | gas phase; ALS |
By formula: CH2F2 + Br2 = HBr + CHBrF2
Quantity | Value | Units | Method | Reference | Comment |
---|---|---|---|---|---|
ΔrH° | -9.54 ± 0.07 | kcal/mol | Eqk | Okafo and Whittle, 1974 | gas phase; ALS |
By formula: CCl4 + Br2 = BrCl + CBrCl3
Quantity | Value | Units | Method | Reference | Comment |
---|---|---|---|---|---|
ΔrH° | 8.8 ± 0.3 | kcal/mol | Eqk | Mendenhall, Golden, et al., 1973 | gas phase; ALS |
By formula: CHF3 + Br2 = HBr + CBrF3
Quantity | Value | Units | Method | Reference | Comment |
---|---|---|---|---|---|
ΔrH° | -3.3 | kcal/mol | Eqk | Corbett, Tarr, et al., 1963 | gas phase; At 298 K; ALS |
By formula: CHBr3 + Br2 = HBr + CBr4
Quantity | Value | Units | Method | Reference | Comment |
---|---|---|---|---|---|
ΔrH° | -1.7 ± 0.7 | kcal/mol | Eqk | King, Golden, et al., 1971, 2 | gas phase; ALS |
By formula: HBr + CBrF3 = CHF3 + Br2
Quantity | Value | Units | Method | Reference | Comment |
---|---|---|---|---|---|
ΔrH° | 4.59 ± 0.25 | kcal/mol | Eqk | Coomber and Whittle, 1967 | gas phase; ALS |
By formula: CH4 + Br2 = HBr + CH3Br
Quantity | Value | Units | Method | Reference | Comment |
---|---|---|---|---|---|
ΔrH° | -6.3 ± 0.2 | kcal/mol | Eqk | Ferguson, Okafo, et al., 1973 | gas phase; ALS |
By formula: C4H8Br2 = C4H8 + Br2
Quantity | Value | Units | Method | Reference | Comment |
---|---|---|---|---|---|
ΔrH° | 33.40 ± 0.11 | kcal/mol | Cm | Sunner and Wulff, 1974 | liquid phase; ALS |
Mass spectrum (electron ionization)
Go To: Top, Gas phase thermochemistry data, Condensed phase thermochemistry data, Phase change data, Reaction thermochemistry data, References, Notes
Data compilation copyright by the U.S. Secretary of Commerce on behalf of the U.S.A. All rights reserved.
Data compiled by: NIST Mass Spectrometry Data Center, William E. Wallace, director
Spectrum
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Additional Data
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Owner | NIST Mass Spectrometry Data Center Collection (C) 2014 copyright by the U.S. Secretary of Commerce on behalf of the United States of America. All rights reserved. |
---|---|
Origin | J. PASSMORE, DEP. CHEM., NEW BRUNSWICK UNIV., CANADA |
NIST MS number | 98246 |
References
Go To: Top, Gas phase thermochemistry data, Condensed phase thermochemistry data, Phase change data, Reaction thermochemistry data, Mass spectrum (electron ionization), Notes
Data compilation copyright by the U.S. Secretary of Commerce on behalf of the U.S.A. All rights reserved.
Cox, Wagman, et al., 1984
Cox, J.D.; Wagman, D.D.; Medvedev, V.A.,
CODATA Key Values for Thermodynamics, Hemisphere Publishing Corp., New York, 1984, 1. [all data]
Chase, 1998
Chase, M.W., Jr.,
NIST-JANAF Themochemical Tables, Fourth Edition,
J. Phys. Chem. Ref. Data, Monograph 9, 1998, 1-1951. [all data]
Weber, 1912
Weber, H.C.P.,
J. Am. Chem. Soc., 1912, 34, 1294. [all data]
Serullas, 1827
Serullas,
New Compounds of Bromine. Ethyl Bromide ("Ether Hydro-Bromique"), and Cyanogen Bromide ("Cyanure de Brome"). Solidification of Bromine and of Bromform ("Hydro-carbure de Brome"),
Ann. Chim. Phys., 1827, 34, 95. [all data]
Blair and Ihle, 1973
Blair, A.; Ihle, H.,
The thermal decomposition and thermodynamic properties of uranium pentabromide,
Journal of Inorganic and Nuclear Chemistry, 1973, 35, 11, 3795-3803, https://doi.org/10.1016/0022-1902(73)80071-5
. [all data]
Fischer and Bingle, 1955
Fischer, Jack; Bingle, James,
The Vapor Pressure of Bromine from 24 to 116° 1,
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Coomber, J.W.; Whittle, E.,
Bond dissociation energies from equilibrium studies. Part 1.-D(CF3-Br), D(C2F5-Br) and D(n-C3F7-Br),
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Ferguson, Okafo, et al., 1973
Ferguson, K.C.; Okafo, E.N.; Whittle, E.,
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Notes
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- Symbols used in this document:
S°gas,1 bar Entropy of gas at standard conditions (1 bar) S°liquid Entropy of liquid at standard conditions Tfus Fusion (melting) point ΔfH°gas Enthalpy of formation of gas at standard conditions ΔrG° Free energy of reaction at standard conditions ΔrH° Enthalpy of reaction at standard conditions ΔvapH Enthalpy of vaporization - Data from NIST Standard Reference Database 69: NIST Chemistry WebBook
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