Cyanogen bromide
- Formula: CBrN
- Molecular weight: 105.921
- IUPAC Standard InChI: InChI=1S/CBrN/c2-1-3
- IUPAC Standard InChIKey: ATDGTVJJHBUTRL-UHFFFAOYSA-N
- CAS Registry Number: 506-68-3
- 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: Bromine cyanide; Bromocyan; Bromocyanide; Bromocyanogen; Campilit; Cyanobromide; Cyanogen monobromide; BrCN; (CN)Br; Bromine cyanide (BrCN); Bromocyanide (BrCN); Bromure de cyanogen; Cyanogen bromide (BrCN); TL 822; Cyanogen bromide ((CN)Br); Rcra waste number U246; UN 1889; Bromine monocyanide; NSC 89684
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Gas phase thermochemistry data
Go To: Top, 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 as indicated in comments:
ALS - Hussein Y. Afeefy, Joel F. Liebman, and Stephen E. Stein
| Quantity | Value | Units | Method | Reference | Comment |
|---|---|---|---|---|---|
| ΔfH°gas | 186.19 | kJ/mol | Review | Chase, 1998 | Data last reviewed in June, 1969 |
| ΔfH°gas | 185.6 ± 6.0 | kJ/mol | Cm | Lord and Woolf, 1954 | Reanalyzed by Cox and Pilcher, 1970, Original value = 181. kJ/mol; Heat of hydrolysis; ALS |
| Quantity | Value | Units | Method | Reference | Comment |
| S°gas,1 bar | 248.35 | J/mol*K | Review | Chase, 1998 | Data last reviewed in June, 1969 |
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 1300. | 1300. to 6000. |
|---|---|---|
| A | 46.46248 | 60.31152 |
| B | 15.50076 | 2.211040 |
| C | -2.870656 | -0.200183 |
| D | -0.631956 | 0.013172 |
| E | -0.327555 | -4.574618 |
| F | 170.5700 | 158.1088 |
| G | 298.2485 | 307.9006 |
| H | 186.1880 | 186.1880 |
| Reference | Chase, 1998 | Chase, 1998 |
| Comment | Data last reviewed in June, 1969 | Data last reviewed in June, 1969 |
Condensed phase thermochemistry data
Go To: Top, Gas 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: Hussein Y. Afeefy, Joel F. Liebman, and Stephen E. Stein
| Quantity | Value | Units | Method | Reference | Comment |
|---|---|---|---|---|---|
| ΔfH°solid | 140.4 ± 4.3 | kJ/mol | Cm | Lord and Woolf, 1954 | Reanalyzed by Pedley, Naylor, et al., 1986, Original value = 136. kJ/mol; Heat of hydrolysis |
Phase change data
Go To: Top, Gas phase thermochemistry data, Condensed phase thermochemistry 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 as indicated in comments:
ALS - Hussein Y. Afeefy, Joel F. Liebman, and Stephen E. Stein
AC - William E. Acree, Jr., James S. Chickos
| Quantity | Value | Units | Method | Reference | Comment |
|---|---|---|---|---|---|
| ΔsubH° | 45.23 | kJ/mol | V | Lord and Woolf, 1954 | Heat of hydrolysis; ALS |
Antoine Equation Parameters
log10(P) = A − (B / (T + C))
P = vapor pressure (bar)
T = temperature (K)
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| Temperature (K) | A | B | C | Reference | Comment |
|---|---|---|---|---|---|
| 273.01 to 313.09 | 3.53667 | 727.385 | -130.052 | Lord and Woolf, 1954 | Coefficents calculated by NIST from author's data. |
Enthalpy of sublimation
| ΔsubH (kJ/mol) | Temperature (K) | Method | Reference | Comment |
|---|---|---|---|---|
| 45.2 ± 4.2 | 273. to 308. | MM | Lord and Woolf, 1954, 2 | See also Cox and Pilcher, 1970, 2.; AC |
| 45.9 | 288. | N/A | Lord and Woolf, 1954, 2 | Based on data from 273. to 313. K. See also Boublik, Fried, et al., 1984.; AC |
| 47.0 | 256. to 308. | GS | Baxter, Bezzenberger, et al., 1920 | AC |
Reaction thermochemistry data
Go To: Top, Gas phase thermochemistry data, Condensed phase thermochemistry data, Phase change 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: 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.
Individual Reactions
2 +
=
+
+ CNO.Na
By formula: 2HNaO + CBrN = BrNa + H2O + CNO.Na
| Quantity | Value | Units | Method | Reference | Comment |
|---|---|---|---|---|---|
| ΔrH° | -234.6 ± 0.71 | kJ/mol | Cm | Lord and Woolf, 1954 | solid phase; Heat of hydrolysis |
References
Go To: Top, Gas phase thermochemistry data, Condensed phase thermochemistry data, Phase change data, Reaction thermochemistry data, Notes
Data compilation copyright by the U.S. Secretary of Commerce on behalf of the U.S.A. All rights reserved.
Chase, 1998
Chase, M.W., Jr.,
NIST-JANAF Themochemical Tables, Fourth Edition,
J. Phys. Chem. Ref. Data, Monograph 9, 1998, 1-1951. [all data]
Lord and Woolf, 1954
Lord, G.; Woolf, A.A.,
The cyanogen halides. Part III. Their heats of formation and free energies,
J. Chem. Soc., 1954, 2546-2551. [all data]
Cox and Pilcher, 1970
Cox, J.D.; Pilcher, G.,
Thermochemistry of Organic and Organometallic Compounds, Academic Press, New York, 1970, 1-636. [all data]
Pedley, Naylor, et al., 1986
Pedley, J.B.; Naylor, R.D.; Kirby, S.P.,
Thermochemical Data of Organic Compounds, Chapman and Hall, New York, 1986, 1-792. [all data]
Lord and Woolf, 1954, 2
Lord, G.; Woolf, A.A.,
The cyanogen halides. Part III. Their heats of formation and free energies,
J. Chem. Soc., 1954, 2546, https://doi.org/10.1039/jr9540002546
. [all data]
Cox and Pilcher, 1970, 2
Cox, J.D.; Pilcher, G.,
Thermochemistry of Organic and Organometallic Compounds, Academic Press Inc., London, 1970, 643. [all data]
Boublik, Fried, et al., 1984
Boublik, T.; Fried, V.; Hala, E.,
The Vapour Pressures of Pure Substances: Selected Values of the Temperature Dependence of the Vapour Pressures of Some Pure Substances in the Normal and Low Pressure Region, 2nd ed., Elsevier, New York, 1984, 972. [all data]
Baxter, Bezzenberger, et al., 1920
Baxter, G.P.; Bezzenberger, F.K.; Wilson, C.H.,
THE VAPOR PRESSURES OF CERTAIN SUBSTANCES: CHLORO-PICRIN, CYANOGEN BROMIDE, METHYL-DICHLORO-ARSINE, PHENYL-DICHLORO-ARSINE, DIPHENYL-CHLORO-ARSINE AND ARSENIC TRICHLORIDE. 1,
J. Am. Chem. Soc., 1920, 42, 7, 1386-1393, https://doi.org/10.1021/ja01452a012
. [all data]
Notes
Go To: Top, Gas phase thermochemistry data, Condensed phase thermochemistry data, Phase change data, Reaction thermochemistry data, References
- Symbols used in this document:
S°gas,1 bar Entropy of gas at standard conditions (1 bar) ΔfH°gas Enthalpy of formation of gas at standard conditions ΔfH°solid Enthalpy of formation of solid at standard conditions ΔrH° Enthalpy of reaction at standard conditions ΔsubH Enthalpy of sublimation ΔsubH° Enthalpy of sublimation at standard conditions - Data from NIST Standard Reference Database 69: NIST Chemistry WebBook
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