Dicyandiamide
- Formula: C2H4N4
- Molecular weight: 84.0800
- IUPAC Standard InChIKey: QGBSISYHAICWAH-UHFFFAOYSA-N
- CAS Registry Number: 461-58-5
- 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: Guanidine, cyano-; Cyanoguanidine; Dicyanodiamide; N-Cyanoguanidine; Pyroset DO; 1-Cyanoguanidine; 2-Cyanoguanidine; Guanidine-1-carbonitrile; NCN=C(NH2)2; Dicyanediamide; Dicyandiamin; ACR-H 3636; Araldite HT 986; Araldite XB 2879B; Araldite XB 2979B; Bakelite VE 2560; Epicure DICY 15; Epicure DICY 7; Guanidine, N-cyano-; NSC 2031; XB 2879B
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Condensed phase thermochemistry data
Go To: Top, 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:
ALS - Hussein Y. Afeefy, Joel F. Liebman, and Stephen E. Stein
DH - Eugene S. Domalski and Elizabeth D. Hearing
Quantity | Value | Units | Method | Reference | Comment |
---|---|---|---|---|---|
ΔfH°solid | 5.08 ± 0.48 | kcal/mol | Ccb | Medard and Thomas, 1952 | Reanalyzed by Cox and Pilcher, 1970, Original value = 5.56 kcal/mol; Author's hf291_condensed=4.5 kcal/mol; ALS |
ΔfH°solid | 5.96 | kcal/mol | Ccb | Salley and Gray, 1951 | correction of Salley and Gray, 1948; ALS |
Quantity | Value | Units | Method | Reference | Comment |
ΔcH°solid | -329.261 | kcal/mol | Ccb | Handrick, 1956 | ALS |
ΔcH°solid | -329.81 ± 0.48 | kcal/mol | Ccb | Medard and Thomas, 1952 | Reanalyzed by Cox and Pilcher, 1970, Original value = -330.3 kcal/mol; Author's hf291_condensed=4.5 kcal/mol; ALS |
ΔcH°solid | -330.70 | kcal/mol | Ccb | Salley and Gray, 1951 | correction of Salley and Gray, 1948; ALS |
Quantity | Value | Units | Method | Reference | Comment |
S°solid,1 bar | 30.901 | cal/mol*K | N/A | Stephenson and Berets, 1952 | DH |
Constant pressure heat capacity of solid
Cp,solid (cal/mol*K) | Temperature (K) | Reference | Comment |
---|---|---|---|
33.9 | 340. | David, 1964 | T = 298 to 373 K. Mean value. T = uncertain.; DH |
28.141 | 294.63 | Stephenson and Berets, 1952 | T = 15 to 300 K. Value is unsmoothed experimental datum.; DH |
Mass spectrum (electron ionization)
Go To: Top, Condensed 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 by: NIST Mass Spectrometry Data Center, William E. Wallace, director
Spectrum
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Additional Data
View image of digitized spectrum (can be printed in landscape orientation).
Due to licensing restrictions, this spectrum cannot be downloaded.
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 | Japan AIST/NIMC Database- Spectrum MS-NW-4978 |
NIST MS number | 228929 |
References
Go To: Top, Condensed phase 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.
Medard and Thomas, 1952
Medard, L.; Thomas, M.,
Determination des chaleurs de combustion de douze composes organiques utilises dans les poudres et enplosies,
Mem. Poudres, 1952, 34, 421-442. [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]
Salley and Gray, 1951
Salley, D.J.; Gray, J.B.,
Heats of combustion of some organic nitrogen compounds,
J. Am. Chem. Soc., 1951, 73, 5925. [all data]
Salley and Gray, 1948
Salley, D.J.; Gray, J.B.,
Heats of combustion of some organic nitrogen compounds,
J. Am. Chem. Soc., 1948, 70, 2650-2653. [all data]
Handrick, 1956
Handrick, G.R.,
Report of the study of pure explosive compounds. Part IV. Calculation of heat of combustion of organic compounds from structural features and calculation of power of high explosives, Rpt. C-58247 for the Office of the Chief of Ordnance, contract DA-19-020-ORD-47 by the Arthur D. Little, Inc., Cambridge, MA, 1956, 467-573. [all data]
Stephenson and Berets, 1952
Stephenson, C.C.; Berets, D.J.,
The heat capacities and entropies of melamine and dicyandiamide,
J. Am. Chem. Soc., 1952, 74, 882-883. [all data]
David, 1964
David, D.J.,
Determination of specific heat and heat of fusion by differential thermal analysis. Study of theory and operating parameters,
Anal. Chem., 1964, 36, 2162-2166. [all data]
Notes
Go To: Top, Condensed phase thermochemistry data, Mass spectrum (electron ionization), References
- Symbols used in this document:
Cp,solid Constant pressure heat capacity of solid S°solid,1 bar Entropy of solid at standard conditions (1 bar) ΔcH°solid Enthalpy of combustion of solid at standard conditions ΔfH°solid Enthalpy of formation of solid at standard conditions - Data from NIST Standard Reference Database 69: NIST Chemistry WebBook
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