Hydrogen bromide
- Formula: BrH
- Molecular weight: 80.912
- IUPAC Standard InChIKey: CPELXLSAUQHCOX-UHFFFAOYSA-N
- CAS Registry Number: 10035-10-6
- 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: Hydrobromic acid; Anhydrous hydrobromic acid; HBr; Hydrogen bromide, anhydrous-; Acide bromhydrique; Acido bromidrico; Bromowodor; Bromwasserstoff; Broomwaterstof; UN 1048; UN 1788; Hydrogen monobromide
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- Information on this page:
- Other data available:
- Phase change data
- Reaction thermochemistry data: reactions 51 to 76
- Henry's Law data
- Ion clustering data
- IR Spectrum
- Constants of diatomic molecules
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Gas phase thermochemistry data
Go To: Top, Reaction thermochemistry data, Gas phase ion energetics 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 | -36.29 ± 0.16 | kJ/mol | Review | Cox, Wagman, et al., 1984 | CODATA Review value |
ΔfH°gas | -36.44 | kJ/mol | Review | Chase, 1998 | Data last reviewed in September, 1965 |
Quantity | Value | Units | Method | Reference | Comment |
S°gas,1 bar | 198.700 ± 0.004 | J/mol*K | Review | Cox, Wagman, et al., 1984 | CODATA Review value |
S°gas,1 bar | 198.70 | J/mol*K | Review | Chase, 1998 | Data last reviewed in September, 1965 |
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 (J/mol*K)
H° = standard enthalpy (kJ/mol)
S° = standard entropy (J/mol*K)
t = temperature (K) / 1000.
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Temperature (K) | 298. to 1100. | 1100. to 6000. |
---|---|---|
A | 31.71409 | 32.88913 |
B | -13.69992 | 2.822116 |
C | 23.35567 | -0.478035 |
D | -9.008529 | 0.032464 |
E | -0.028758 | -3.174958 |
F | -45.57464 | -52.46318 |
G | 240.0428 | 230.8597 |
H | -36.44306 | -36.44306 |
Reference | Chase, 1998 | Chase, 1998 |
Comment | Data last reviewed in September, 1965 | Data last reviewed in September, 1965 |
Reaction thermochemistry data
Go To: Top, Gas phase thermochemistry data, Gas phase ion energetics 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:
B - John E. Bartmess
M - Michael M. Meot-Ner (Mautner) and Sharon G. Lias
MS - José A. Martinho Simões
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
By formula: Br- + HBr = (Br- • HBr)
Bond type: Hydrogen bond (negative ion to hydride)
Quantity | Value | Units | Method | Reference | Comment |
---|---|---|---|---|---|
ΔrH° | 86.2 ± 8.4 | kJ/mol | TDAs | Caldwell and Kebarle, 1985 | gas phase; B,M |
ΔrH° | 73.2 | kJ/mol | FA | Davidson, Fehsenfeld, et al., 1977 | gas phase; From thermochemical cycle,switching reaction(Br-/NO3-HNO3/HBr); DG>, ΔrH>; M |
Quantity | Value | Units | Method | Reference | Comment |
ΔrS° | 93.3 | J/mol*K | PHPMS | Caldwell and Kebarle, 1985 | gas phase; M |
ΔrS° | 92. | J/mol*K | FA | Davidson, Fehsenfeld, et al., 1977 | gas phase; From thermochemical cycle,switching reaction(Br-/NO3-HNO3/HBr); DG>, ΔrH>; M |
Quantity | Value | Units | Method | Reference | Comment |
ΔrG° | 58. ± 11. | kJ/mol | TDAs | Caldwell and Kebarle, 1985 | gas phase; B |
Free energy of reaction
ΔrG° (kJ/mol) | T (K) | Method | Reference | Comment |
---|---|---|---|---|
39. | 367. | FA | Davidson, Fehsenfeld, et al., 1977 | gas phase; From thermochemical cycle,switching reaction(Br-/NO3-HNO3/HBr); DG>, ΔrH>; M |
Quantity | Value | Units | Method | Reference | Comment |
---|---|---|---|---|---|
ΔrH° | 1353.69 ± 0.21 | kJ/mol | D-EA | Blondel, Cacciani, et al., 1989 | gas phase; reported: 27129.170±0.015 cm-1; B |
ΔrH° | 1353. ± 8.8 | kJ/mol | G+TS | Taft and Bordwell, 1988 | gas phase; B |
ΔrH° | 1341.4 | kJ/mol | N/A | Check, Faust, et al., 2001 | gas phase; F-; ; ΔS(acid)=19.2; ΔS(EA)=6.4; B |
Quantity | Value | Units | Method | Reference | Comment |
ΔrG° | 1331.8 ± 0.63 | kJ/mol | H-TS | Blondel, Cacciani, et al., 1989 | gas phase; reported: 27129.170±0.015 cm-1; B |
ΔrG° | 1331. ± 8.4 | kJ/mol | IMRE | Taft and Bordwell, 1988 | gas phase; B |
ΔrG° | 1319.6 | kJ/mol | N/A | Check, Faust, et al., 2001 | gas phase; F-; ; ΔS(acid)=19.2; ΔS(EA)=6.4; B |
C8H6MoO3 (cr) + (solution) =
(solution) +
(cr)
By formula: C8H6MoO3 (cr) + Br2 (solution) = HBr (solution) + C8H5BrMoO3 (cr)
Quantity | Value | Units | Method | Reference | Comment |
---|---|---|---|---|---|
ΔrH° | -150. ± 12. | kJ/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), -254.0 ± 8.4 kJ/mol, and Mo(Cp)(CO)3(Br)(cr) + Br2(solution) = Mo(Cp)(CO)2(Br)3(solution) + CO(solution), -104.2 ± 8.4 kJ/mol; MS |
By formula: NO3- + HBr = (NO3- • HBr)
Quantity | Value | Units | Method | Reference | Comment |
---|---|---|---|---|---|
ΔrS° | 96. | J/mol*K | N/A | Davidson, Fehsenfeld, et al., 1977 | gas phase; switching reaction(NO3-)HNO3, Entropy change calculated or estimated, DG<, ΔrH<; M |
Quantity | Value | Units | Method | Reference | Comment |
ΔrG° | 73. ± 16. | kJ/mol | TDEq | Davidson, Fehsenfeld, et al., 1977 | gas phase; Anchored to HBr..Br- in Caldwell and Kebarle, 1985.; B |
Free energy of reaction
ΔrG° (kJ/mol) | T (K) | Method | Reference | Comment |
---|---|---|---|---|
53.1 | 367. | FA | Davidson, Fehsenfeld, et al., 1977 | gas phase; switching reaction(NO3-)HNO3, Entropy change calculated or estimated, DG<, ΔrH<; M |
By formula: I- + HBr = (I- • HBr)
Bond type: Hydrogen bond (negative ion to hydride)
Quantity | Value | Units | Method | Reference | Comment |
---|---|---|---|---|---|
ΔrH° | 67.4 ± 8.4 | kJ/mol | TDEq | Caldwell and Kebarle, 1985 | gas phase; B,M |
Quantity | Value | Units | Method | Reference | Comment |
ΔrS° | 82.0 | J/mol*K | PHPMS | Caldwell and Kebarle, 1985 | gas phase; switching reaction(I-)SO2; M |
Quantity | Value | Units | Method | Reference | Comment |
ΔrG° | 43. ± 11. | kJ/mol | TDEq | Caldwell and Kebarle, 1985 | gas phase; B |
Free energy of reaction
ΔrG° (kJ/mol) | T (K) | Method | Reference | Comment |
---|---|---|---|---|
42.7 | 300. | PHPMS | Caldwell and Kebarle, 1985 | gas phase; switching reaction(I-)SO2; M |
By formula: HBr + C3H6 = C3H7Br
Quantity | Value | Units | Method | Reference | Comment |
---|---|---|---|---|---|
ΔrH° | -85.48 | kJ/mol | Cm | Lacher, Kianpour, et al., 1957 | gas phase; ALS |
ΔrH° | -83.889 | kJ/mol | Cm | Lacher, Lea, et al., 1950 | gas phase; Heat of hydrobromination at 367°K; ALS |
ΔrH° | -84.10 ± 0.59 | kJ/mol | Cm | Lacher, Walden, et al., 1950 | gas phase; Reanalyzed by Cox and Pilcher, 1970, Original value = -84.4 ± 1.0 kJ/mol; Heat of hydrobromination; ALS |
By formula: (Br- • O2S) + HBr = (Br- • HBr • O2S)
Bond type: Hydrogen bond (negative ion to hydride)
Quantity | Value | Units | Method | Reference | Comment |
---|---|---|---|---|---|
ΔrH° | 51.0 | kJ/mol | PHPMS | Caldwell and Kebarle, 1985 | gas phase; From thermochemical cycle,switching reaction(Br- HBr)SO2; M |
Quantity | Value | Units | Method | Reference | Comment |
ΔrS° | 80.3 | J/mol*K | PHPMS | Caldwell and Kebarle, 1985 | gas phase; From thermochemical cycle,switching reaction(Br- HBr)SO2; M |
By formula: (NO3- • HNO3) + HBr = (NO3- • HBr • HNO3)
Quantity | Value | Units | Method | Reference | Comment |
---|---|---|---|---|---|
ΔrH° | 66.9 | kJ/mol | FA | Davidson, Fehsenfeld, et al., 1977 | gas phase; switching reaction(NO3-)2HNO3; M |
Quantity | Value | Units | Method | Reference | Comment |
ΔrS° | 95.8 | J/mol*K | FA | Davidson, Fehsenfeld, et al., 1977 | gas phase; switching reaction(NO3-)2HNO3; M |
Quantity | Value | Units | Method | Reference | Comment |
ΔrG° | 38. | kJ/mol | FA | Davidson, Fehsenfeld, et al., 1977 | gas phase; switching reaction(NO3-)2HNO3; M |
(g) + CH3BrMg (solution) =
(solution) + Br2Mg (solution)
By formula: HBr (g) + CH3BrMg (solution) = CH4 (solution) + Br2Mg (solution)
Quantity | Value | Units | Method | Reference | Comment |
---|---|---|---|---|---|
ΔrH° | -274.5 ± 2.2 | kJ/mol | RSC | Holm, 1981 | solvent: Diethyl ether; The enthalpy of formation was calculated using the assumptions and the auxiliary data in Holm, 1981, except for the organic compound, whose enthalpy of formation was quoted from Pedley, 1994; MS |
By formula: (Br- • HBr) + HBr = (Br- • 2HBr)
Bond type: Hydrogen bond (negative ion to hydride)
Quantity | Value | Units | Method | Reference | Comment |
---|---|---|---|---|---|
ΔrH° | 46.0 | kJ/mol | PHPMS | Caldwell and Kebarle, 1985 | gas phase; M |
Quantity | Value | Units | Method | Reference | Comment |
ΔrS° | 71.1 | J/mol*K | PHPMS | Caldwell and Kebarle, 1985 | gas phase; M |
By formula: C4H4BrNO2 + 0.5H4N2 = HBr + C4H5NO2 + 0.5N2
Quantity | Value | Units | Method | Reference | Comment |
---|---|---|---|---|---|
ΔrH° | -260.3 ± 0.46 | kJ/mol | Cm | Howard and Skinner, 1966 | solid phase; solvent: Aqueous solution; Reanalyzed by Pedley, Naylor, et al., 1986, Original value = -261.7 ± 0.46 kJ/mol; ALS |
By formula: CH3+ + HBr = (CH3+ • HBr)
Quantity | Value | Units | Method | Reference | Comment |
---|---|---|---|---|---|
ΔrH° | 232. | kJ/mol | PHPMS | McMahon, Heinis, et al., 1988 | gas phase; switching reaction(CH3+)N2, Entropy change calculated or estimated, uses MCA(N2) = 202. kJ/mol; Foster, Williamson, et al., 1974; M |
C4H9Li (l) + (g) =
(l) +
(cr)
By formula: C4H9Li (l) + HBr (g) = C4H10 (l) + BrLi (cr)
Quantity | Value | Units | Method | Reference | Comment |
---|---|---|---|---|---|
ΔrH° | -374.0 ± 2.0 | kJ/mol | RSC | Holm, 1974 | Please also see Pedley and Rylance, 1977. The reaction enthalpy was quoted from Pedley and Rylance, 1977. See Liebman, Martinho Simões, et al., 1995 for comments; MS |
By formula: HBr (g) + CH3Li (cr) = CH4 (g) + BrLi (cr)
Quantity | Value | Units | Method | Reference | Comment |
---|---|---|---|---|---|
ΔrH° | -317.3 ± 2.0 | kJ/mol | RSC | Holm, 1974 | Please also see Pedley and Rylance, 1977. The reaction enthalpy was quoted from Pedley and Rylance, 1977. See Liebman, Martinho Simões, et al., 1995 for comments; MS |
By formula: HBr (g) + C2H5Li (cr) = C2H6 (g) + BrLi (cr)
Quantity | Value | Units | Method | Reference | Comment |
---|---|---|---|---|---|
ΔrH° | -345.7 ± 2.0 | kJ/mol | RSC | Holm, 1974 | Please also see Pedley and Rylance, 1977. The reaction enthalpy was quoted from Pedley and Rylance, 1977. See Liebman, Martinho Simões, et al., 1995 for comments; MS |
(g) + C4H9Li (l) =
(l) +
(cr)
By formula: HBr (g) + C4H9Li (l) = C4H10 (l) + BrLi (cr)
Quantity | Value | Units | Method | Reference | Comment |
---|---|---|---|---|---|
ΔrH° | -352.7 ± 2.0 | kJ/mol | RSC | Holm, 1974 | Please also see Pedley and Rylance, 1977. The reaction enthalpy was quoted from Pedley and Rylance, 1977. See Liebman, Martinho Simões, et al., 1995 for comments; MS |
By formula: (NO3- • HBr) + HNO3 = (NO3- • HNO3 • HBr)
Quantity | Value | Units | Method | Reference | Comment |
---|---|---|---|---|---|
ΔrH° | 66.9 ± 8.4 | kJ/mol | TDEq | Davidson, Fehsenfeld, et al., 1977 | gas phase; B |
Quantity | Value | Units | Method | Reference | Comment |
ΔrG° | 40. ± 12. | kJ/mol | TDEq | Davidson, Fehsenfeld, et al., 1977 | gas phase; B |
By formula: HBr + C4H8 = C4H9Br
Quantity | Value | Units | Method | Reference | Comment |
---|---|---|---|---|---|
ΔrH° | -77.07 ± 0.50 | kJ/mol | Cm | Lacher, Billings, et al., 1952 | gas phase; Reanalyzed by Cox and Pilcher, 1970, Original value = -76.8 ± 6.6 kJ/mol; Heat of Hydrobromination at 373 K; ALS |
By formula: HBr + C4H8 = C4H9Br
Quantity | Value | Units | Method | Reference | Comment |
---|---|---|---|---|---|
ΔrH° | -72.22 ± 0.50 | kJ/mol | Cm | Lacher, Billings, et al., 1952 | gas phase; Reanalyzed by Cox and Pilcher, 1970, Original value = -72.6 ± 5.6 kJ/mol; Heat of hydrobromination at 373 K; ALS |
By formula: HBr + C4H8 = C4H9Br
Quantity | Value | Units | Method | Reference | Comment |
---|---|---|---|---|---|
ΔrH° | -83.85 ± 0.50 | kJ/mol | Cm | Lacher, Billings, et al., 1952 | gas phase; Reanalyzed by Cox and Pilcher, 1970, Original value = -84.3 ± 7.5 kJ/mol; Heat of hydrobromination at 367 K; ALS |
By formula: HBr + C3H6 = C3H7Br
Quantity | Value | Units | Method | Reference | Comment |
---|---|---|---|---|---|
ΔrH° | -107.8 ± 1.3 | kJ/mol | Cm | Lacher, Kianpour, et al., 1957 | gas phase; ALS |
ΔrH° | -94.94 ± 0.65 | kJ/mol | Cm | Lacher, Walden, et al., 1950 | gas phase; Heat of hydrobromination; ALS |
By formula: (Br- • HBr) + O2S = (Br- • O2S • HBr)
Quantity | Value | Units | Method | Reference | Comment |
---|---|---|---|---|---|
ΔrH° | 45.6 | kJ/mol | PHPMS | Caldwell and Kebarle, 1985 | gas phase; M |
Quantity | Value | Units | Method | Reference | Comment |
ΔrS° | 79.1 | J/mol*K | PHPMS | Caldwell and Kebarle, 1985 | gas phase; M |
By formula: C2H3BrO + H2O = HBr + C2H4O2
Quantity | Value | Units | Method | Reference | Comment |
---|---|---|---|---|---|
ΔrH° | -97.53 | kJ/mol | Cm | Devore and O'Neal, 1969 | liquid phase; Heat of hydrolysis; ALS |
ΔrH° | -96.48 | kJ/mol | Cm | Carson and Skinner, 1949 | liquid phase; ALS |
By formula: H2 + C3H7Br = HBr + C3H8
Quantity | Value | Units | Method | Reference | Comment |
---|---|---|---|---|---|
ΔrH° | -45.40 ± 0.92 | kJ/mol | Chyd | Davies, Lacher, et al., 1965 | gas phase; Reanalyzed by Cox and Pilcher, 1970, Original value = -45.06 kJ/mol; ALS |
By formula: HBr + C7H7Br = C7H8 + Br2
Quantity | Value | Units | Method | Reference | Comment |
---|---|---|---|---|---|
ΔrH° | 33.9 ± 4.2 | kJ/mol | Eqk | Benson and Buss, 1957 | gas phase; Reanalyzed by Cox and Pilcher, 1970, Original value = 33. ± 4. kJ/mol; ALS |
By formula: C3H6Br2 = HBr + C3H5Br
Quantity | Value | Units | Method | Reference | Comment |
---|---|---|---|---|---|
ΔrH° | 64.9 | kJ/mol | Eqk | Levanova, Rodova, et al., 1983 | liquid phase; Flow reactor; ALS |
ΔrH° | 69.9 ± 0.8 | kJ/mol | Eqk | Sharonov and Rozhnov, 1971 | gas phase; ALS |
+ 218.5
+ 11.25
+
=
+ 13
+ 1.5
By formula: CBrN3O6 + 218.5H2O + 11.25O2 + C12H14O4 = HBr + 13CO2 + 1.5N2
Quantity | Value | Units | Method | Reference | Comment |
---|---|---|---|---|---|
ΔrH° | -6350.2 ± 1.0 | kJ/mol | Ccr | Carpenter, Zimmer, et al., 1970 | liquid phase; The HBr is in 225H2O; ALS |
By formula: C2H5Br = HBr + C2H4
Quantity | Value | Units | Method | Reference | Comment |
---|---|---|---|---|---|
ΔrH° | 80.3 ± 2.1 | kJ/mol | Eqk | Lane, Linnett, et al., 1953 | gas phase; Reanalyzed by Cox and Pilcher, 1970, Original value = 79.9 kJ/mol; ALS |
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° | -254.0 ± 8.4 | kJ/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° | -66.0 ± 2.9 | kJ/mol | Cm | Koros, Orban, et al., 1979 | liquid phase; solvent: Sulfuric acid (1M); Bromination; ALS |
By formula: C7H9NO + C7H5BrO = HBr + C14H13NO2
Quantity | Value | Units | Method | Reference | Comment |
---|---|---|---|---|---|
ΔrH° | -172. ± 0.8 | kJ/mol | Cac | Kiselev, Khuzyasheva, et al., 1979 | liquid phase; solvent: Benzene; ALS |
By formula: C7H9N + C7H5BrO = HBr + C14H13NO
Quantity | Value | Units | Method | Reference | Comment |
---|---|---|---|---|---|
ΔrH° | -170. ± 0.8 | kJ/mol | Cac | Kiselev, Khuzyasheva, et al., 1979 | liquid phase; solvent: Benzene; ALS |
By formula: HBr + C3H5BrO = C3H6O + Br2
Quantity | Value | Units | Method | Reference | Comment |
---|---|---|---|---|---|
ΔrH° | 31.1 ± 8.4 | kJ/mol | Eqk | King, Golden, et al., 1971 | gas phase; Heat of bromination at 516-618 K; ALS |
By formula: HBr + C2F4 = C2HBrF4
Quantity | Value | Units | Method | Reference | Comment |
---|---|---|---|---|---|
ΔrH° | -137.75 ± 0.75 | kJ/mol | Cm | Lacher, Lea, et al., 1950 | gas phase; Heat of hydrobromination at 367°K; ALS |
By formula: C7H5BrO + C6H7N = HBr + C13H11NO
Quantity | Value | Units | Method | Reference | Comment |
---|---|---|---|---|---|
ΔrH° | -162. ± 0.8 | kJ/mol | Cac | Kiselev, Khuzyasheva, et al., 1979 | liquid phase; solvent: Benzene; ALS |
By formula: HBr + C2ClF3 = C2HBrClF3
Quantity | Value | Units | Method | Reference | Comment |
---|---|---|---|---|---|
ΔrH° | -109.09 ± 0.95 | kJ/mol | Cm | Lacher, Lea, et al., 1950 | gas phase; Heat of hydrobromination at 367°K; ALS |
By formula: CBr2O + H2O = 2HBr + CO2
Quantity | Value | Units | Method | Reference | Comment |
---|---|---|---|---|---|
ΔrH° | -205.3 ± 0.67 | kJ/mol | Cm | Anthoney, Finch, et al., 1970 | liquid phase; Heat of hydrolysis; ALS |
By formula: C2H4BrCl = HBr + C2H3Cl
Quantity | Value | Units | Method | Reference | Comment |
---|---|---|---|---|---|
ΔrH° | 83.3 ± 0.8 | kJ/mol | Eqk | Busheva, Levanova, et al., 1980 | gas phase; Dehydrohalogenation; ALS |
(g) + C2H3BrMg (solution) =
(solution) + Br2Mg (solution)
By formula: HBr (g) + C2H3BrMg (solution) = C2H4 (solution) + Br2Mg (solution)
Quantity | Value | Units | Method | Reference | Comment |
---|---|---|---|---|---|
ΔrH° | -294.1 ± 2.2 | kJ/mol | RSC | Holm, 1981 | solvent: Tetrahydrofuran; MS |
C4H9BrMg (solution) + (g) =
(solution) + Br2Mg (solution)
By formula: C4H9BrMg (solution) + HBr (g) = C4H10 (solution) + Br2Mg (solution)
Quantity | Value | Units | Method | Reference | Comment |
---|---|---|---|---|---|
ΔrH° | -292.5 ± 2.2 | kJ/mol | RSC | Holm, 1981 | solvent: Diethyl ether; MS |
C4H9BrMg (solution) + (g) =
(solution) + Br2Mg (solution)
By formula: C4H9BrMg (solution) + HBr (g) = C4H10 (solution) + Br2Mg (solution)
Quantity | Value | Units | Method | Reference | Comment |
---|---|---|---|---|---|
ΔrH° | -305.9 ± 2.2 | kJ/mol | RSC | Holm, 1981 | solvent: Diethyl ether; MS |
C5H11BrMg (solution) + (g) =
(solution) + Br2Mg (solution)
By formula: C5H11BrMg (solution) + HBr (g) = C5H12 (solution) + Br2Mg (solution)
Quantity | Value | Units | Method | Reference | Comment |
---|---|---|---|---|---|
ΔrH° | -306.3 ± 2.2 | kJ/mol | RSC | Holm, 1981 | solvent: Diethyl ether; MS |
C19H15BrMg (solution) + (g) =
(solution) + Br2Mg (solution)
By formula: C19H15BrMg (solution) + HBr (g) = C19H16 (solution) + Br2Mg (solution)
Quantity | Value | Units | Method | Reference | Comment |
---|---|---|---|---|---|
ΔrH° | -231.0 ± 2.2 | kJ/mol | RSC | Holm, 1981 | solvent: Diethyl ether; MS |
By formula: C3H5Br + H2O = HBr + C3H6O
Quantity | Value | Units | Method | Reference | Comment |
---|---|---|---|---|---|
ΔrH° | -15. | kJ/mol | Cm | Gellner and Skinner, 1949 | liquid phase; Heat of hydrolysis; ALS |
By formula: C7H7Br + H2O = HBr + C7H8O
Quantity | Value | Units | Method | Reference | Comment |
---|---|---|---|---|---|
ΔrH° | -7.9 | kJ/mol | Cm | Gellner and Skinner, 1949 | liquid phase; Heat of hydrloysis; ALS |
C3H7BrMg (solution) + (g) =
(solution) + Br2Mg (solution)
By formula: C3H7BrMg (solution) + HBr (g) = C3H8 (solution) + Br2Mg (solution)
Quantity | Value | Units | Method | Reference | Comment |
---|---|---|---|---|---|
ΔrH° | -305.9 ± 2.2 | kJ/mol | RSC | Holm, 1981 | solvent: Diethyl ether; MS |
By formula: C7H5BrO + H2O = HBr + C7H6O2
Quantity | Value | Units | Method | Reference | Comment |
---|---|---|---|---|---|
ΔrH° | -113.1 | kJ/mol | Cm | Carson, Pritchard, et al., 1950 | liquid phase; Heat of hydrolysis; ALS |
(g) + C2H5BrMg (solution) =
(solution) + Br2Mg (solution)
By formula: HBr (g) + C2H5BrMg (solution) = C2H6 (solution) + Br2Mg (solution)
Quantity | Value | Units | Method | Reference | Comment |
---|---|---|---|---|---|
ΔrH° | -299.2 ± 2.2 | kJ/mol | RSC | Holm, 1981 | solvent: Diethyl ether; MS |
=
+ C10H15N
By formula: C10H16N.Br = HBr + C10H15N
Quantity | Value | Units | Method | Reference | Comment |
---|---|---|---|---|---|
ΔrH° | -88. ± 4. | kJ/mol | Cm | Arnett and Wernett, 1993 | liquid phase; solvent: DMSO; ALS |
By formula: HBr + C9H10 = C9H11Br
Quantity | Value | Units | Method | Reference | Comment |
---|---|---|---|---|---|
ΔrH° | -63.6 ± 5.4 | kJ/mol | Cm | Nesterova, Kovzel, et al., 1977 | liquid phase; Hydrobromination; ALS |
Gas phase ion energetics data
Go To: Top, Gas 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 evaluated as indicated in comments:
HL - Edward P. Hunter and Sharon G. Lias
L - Sharon G. Lias
Data compiled as indicated in comments:
B - John E. Bartmess
LLK - Sharon G. Lias, Rhoda D. Levin, and Sherif A. Kafafi
RDSH - Henry M. Rosenstock, Keith Draxl, Bruce W. Steiner, and John T. Herron
View reactions leading to HBr+ (ion structure unspecified)
Quantity | Value | Units | Method | Reference | Comment |
---|---|---|---|---|---|
IE (evaluated) | 11.68 ± 0.03 | eV | N/A | N/A | L |
Quantity | Value | Units | Method | Reference | Comment |
Proton affinity (review) | 584.2 | kJ/mol | N/A | Hunter and Lias, 1998 | HL |
Quantity | Value | Units | Method | Reference | Comment |
Gas basicity | 557.7 | kJ/mol | N/A | Hunter and Lias, 1998 | HL |
Ionization energy determinations
IE (eV) | Method | Reference | Comment |
---|---|---|---|
11.71 | PE | Kimura, Katsumata, et al., 1981 | LLK |
11.66 ± 0.02 | PI | Tiedemann, Anderson, et al., 1979 | LLK |
11.67 | EVAL | Huber and Herzberg, 1979 | LLK |
11.645 ± 0.005 | PE | Delwiche, Natalis, et al., 1973 | LLK |
11.677 ± 0.004 | DER | Haugh and Bayes, 1971 | LLK |
11.67 ± 0.01 | PE | Lempka, Passmore, et al., 1968 | RDSH |
11.71 ± 0.01 | PE | Frost, McDowell, et al., 1967 | RDSH |
11.68 ± 0.03 | PI | Watanabe, 1957 | RDSH |
De-protonation reactions
Quantity | Value | Units | Method | Reference | Comment |
---|---|---|---|---|---|
ΔrH° | 1353.69 ± 0.21 | kJ/mol | D-EA | Blondel, Cacciani, et al., 1989 | gas phase; reported: 27129.170±0.015 cm-1; B |
ΔrH° | 1353. ± 8.8 | kJ/mol | G+TS | Taft and Bordwell, 1988 | gas phase; B |
ΔrH° | 1341.4 | kJ/mol | N/A | Check, Faust, et al., 2001 | gas phase; F-; ; ΔS(acid)=19.2; ΔS(EA)=6.4; B |
Quantity | Value | Units | Method | Reference | Comment |
ΔrG° | 1331.8 ± 0.63 | kJ/mol | H-TS | Blondel, Cacciani, et al., 1989 | gas phase; reported: 27129.170±0.015 cm-1; B |
ΔrG° | 1331. ± 8.4 | kJ/mol | IMRE | Taft and Bordwell, 1988 | gas phase; B |
ΔrG° | 1319.6 | kJ/mol | N/A | Check, Faust, et al., 2001 | gas phase; F-; ; ΔS(acid)=19.2; ΔS(EA)=6.4; B |
Mass spectrum (electron ionization)
Go To: Top, Gas phase thermochemistry data, Reaction thermochemistry data, Gas phase ion energetics 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 | Chemical Concepts |
NIST MS number | 157480 |
References
Go To: Top, Gas phase thermochemistry data, Reaction thermochemistry data, Gas phase ion energetics 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.
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Notes
Go To: Top, Gas phase thermochemistry data, Reaction thermochemistry data, Gas phase ion energetics data, Mass spectrum (electron ionization), References
- Symbols used in this document:
IE (evaluated) Recommended ionization energy S°gas,1 bar Entropy of gas at standard conditions (1 bar) T Temperature 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 ΔrS° Entropy of reaction at standard conditions - Data from NIST Standard Reference Database 69: NIST Chemistry WebBook
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