Cyanic acid
- Formula: CHNO
- Molecular weight: 43.0247
- CAS Registry Number: 420-05-3
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Phase change 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.
Data compiled as indicated in comments:
AC - William E. Acree, Jr., James S. Chickos
Enthalpy of vaporization
| ΔvapH (kcal/mol) | Temperature (K) | Method | Reference | Comment |
|---|---|---|---|---|
| 7.34 | 253. | A | Stephenson and Malanowski, 1987 | Based on data from 233. to 268. K.; 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 |
|---|---|---|---|---|---|
| 196.88 to 267.21 | 4.6843 | 1252.195 | -29.167 | Linhard, 1938 | Coefficents calculated by NIST from author's data. |
Gas phase ion energetics 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 by: John E. Bartmess
Electron affinity determinations
| EA (eV) | Method | Reference | Comment |
|---|---|---|---|
| 0.674 ± 0.031 | IMRB | Born, Ingemann, et al., 1996 |
References
Go To: Top, Phase change data, Gas phase ion energetics data, Notes
Data compilation copyright by the U.S. Secretary of Commerce on behalf of the U.S.A. All rights reserved.
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]
Linhard, 1938
Linhard, Martin,
Der Dampfdruck fl«65533»ssiger Cyans«65533»ure,
Z. Anorg. Allg. Chem., 1938, 236, 1, 200-208, https://doi.org/10.1002/zaac.19382360118
. [all data]
Born, Ingemann, et al., 1996
Born, M.; Ingemann, S.; Nibbering, N.M.M.,
Experimental Determination of the Enthalpies of Formation of Formyl Cyanide and Thioformyl Cyanide in the Gas Phase,
J. Phys. Chem., 1996, 100, 44, 17662, https://doi.org/10.1021/jp9609141
. [all data]
Notes
Go To: Top, Phase change data, Gas phase ion energetics data, References
- Symbols used in this document:
EA Electron affinity ΔvapH Enthalpy of vaporization - Data from NIST Standard Reference Database 69: NIST Chemistry WebBook
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