Cyanogen iodide
- Formula: CIN
- Molecular weight: 152.9219
- IUPAC Standard InChIKey: WPBXOELOQKLBDF-UHFFFAOYSA-N
- CAS Registry Number: 506-78-5
- Chemical structure:
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Gas phase thermochemistry data
Go To: Top, 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 as indicated in comments:
ALS - Hussein Y. Afeefy, Joel F. Liebman, and Stephen E. Stein
Quantity | Value | Units | Method | Reference | Comment |
---|---|---|---|---|---|
ΔfH°gas | 225.94 | kJ/mol | Review | Chase, 1998 | Data last reviewed in June, 1969 |
ΔfH°gas | 224.6 ± 4.3 | kJ/mol | Cm | Lord and Woolf, 1954 | Reanalyzed by Cox and Pilcher, 1970, Original value = 219. kJ/mol; Heat of hydrolysis; ALS |
Quantity | Value | Units | Method | Reference | Comment |
S°gas,1 bar | 257.34 | 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 1200. | 1200. to 6000. |
---|---|---|
A | 49.26325 | 60.08266 |
B | 7.560865 | 1.205993 |
C | 3.675051 | -0.234558 |
D | -2.880508 | 0.015758 |
E | -0.297113 | -4.021343 |
F | 209.8895 | 199.1258 |
G | 312.8946 | 318.3991 |
H | 225.9364 | 225.9364 |
Reference | Chase, 1998 | Chase, 1998 |
Comment | Data last reviewed in June, 1969 | Data last reviewed in June, 1969 |
Phase change data
Go To: Top, Gas phase 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 |
---|---|---|---|---|---|
ΔvapH° | 40.0 ± 0.3 | kJ/mol | V | Ketellaar and Kruyer, 1943 | ALS |
Quantity | Value | Units | Method | Reference | Comment |
ΔsubH° | 59.83 ± 0.42 | kJ/mol | V | Lord and Woolf, 1954 | Reanalyzed by Cox and Pilcher, 1970, Original value = 59.0 kJ/mol; Heat of hydrolysis; ALS |
ΔsubH° | 59.9 ± 0.2 | kJ/mol | V | Ketellaar and Kruyer, 1943 | ALS |
Enthalpy of vaporization
ΔvapH (kJ/mol) | Temperature (K) | Method | Reference | Comment |
---|---|---|---|---|
40.0 | 423. | A | Stephenson and Malanowski, 1987 | Based on data from 419. to 426. K.; AC |
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 |
---|---|---|---|---|---|
298.4 to 414.3 | 7.78435 | 3335.292 | 14.533 | Stull, 1947 | Coefficents calculated by NIST from author's data. |
Enthalpy of sublimation
ΔsubH (kJ/mol) | Temperature (K) | Method | Reference | Comment |
---|---|---|---|---|
59.8 ± 0.4 | 337. to 426. | GSM | Ketelaar and Kruyer, 2010 | See also Cox and Pilcher, 1970, 2.; AC |
59.9 | 352. | GSM | Stephenson and Malanowski, 1987 | Based on data from 337. to 426. K. See also Ketelaar and Kruyer, 2010.; AC |
58.6 | 356. | A | Stull, 1947 | Based on data from 298. to 414. K.; AC |
58.3 | 326. | N/A | Yost and Stone, 1933 | Based on data from 278. to 374. K.; AC |
References
Go To: Top, Gas phase thermochemistry data, Phase change 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]
Ketellaar and Kruyer, 1943
Ketellaar, J.A.A.; Kruyer, S.,
Der dampfdrunk des jodcyans,
Rec. Trav. Chim. Pays-Bas, 1943, 62, 550-552. [all data]
Stephenson and Malanowski, 1987
Stephenson, Richard M.; Malanowski, Stanislaw,
Handbook of the Thermodynamics of Organic Compounds, 1987, https://doi.org/10.1007/978-94-009-3173-2
. [all data]
Stull, 1947
Stull, Daniel R.,
Vapor Pressure of Pure Substances. Organic and Inorganic Compounds,
Ind. Eng. Chem., 1947, 39, 4, 517-540, https://doi.org/10.1021/ie50448a022
. [all data]
Ketelaar and Kruyer, 2010
Ketelaar, J.A.A.; Kruyer, S.,
Der Dampfdruck des Jodcyans,
Recl. Trav. Chim. Pays-Bas, 2010, 62, 8, 550-552, https://doi.org/10.1002/recl.19430620810
. [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]
Yost and Stone, 1933
Yost, Don M.; Stone, William E.,
The Complex Ions Formed by Iodine Cyanide with Cyanide and Iodide Ions. The Vapor Pressure, Free Energy and Dissociation of Iodine Cyanide,
J. Am. Chem. Soc., 1933, 55, 5, 1889-1895, https://doi.org/10.1021/ja01332a015
. [all data]
Notes
Go To: Top, Gas phase thermochemistry data, Phase change 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 ΔsubH Enthalpy of sublimation ΔsubH° Enthalpy of sublimation at standard conditions ΔvapH Enthalpy of vaporization ΔvapH° Enthalpy of vaporization at standard conditions - Data from NIST Standard Reference Database 69: NIST Chemistry WebBook
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