- Formula: C2N2
- Molecular weight: 52.0348
- IUPAC Standard InChIKey: JMANVNJQNLATNU-UHFFFAOYSA-N
- CAS Registry Number: 460-19-5
- Chemical structure:
This structure is also available as a 2d Mol file or as a computed 3d SD file
- Other names: Ethanedinitrile; Cyanogen (C2N2); Carbon nitride (C2N2); Dicyanogen; Nitriloacetonitrile; Oxalic acid dinitrile; Oxalonitrile; NCCN; Dicyan; Cyanogen gas; Carbon nitride; Cyanogene; Oxalic nitrile; Prussite; Rcra waste number P031; UN 1026; (CN)2; Oxalyl cyanide
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Reaction thermochemistry 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:
M - Michael M. Meot-Ner (Mautner) and Sharon G. Lias
ALS - Hussein Y. Afeefy, Joel F. Liebman, and Stephen E. Stein
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+ = ( )
By formula: H4N+ + C2N2 = (H4N+ C2N2)
|rH°||43.5||kJ/mol||PHPMS||Speller and Meot-Ner (Mautner), 1985||gas phase; Entropy change calculated or estimated, DG<, «DELTA»rH<; M|
|rS°||96.||J/mol*K||N/A||Speller and Meot-Ner (Mautner), 1985||gas phase; Entropy change calculated or estimated, DG<, «DELTA»rH<; M|
Free energy of reaction
|rG° (kJ/mol)||T (K)||Method||Reference||Comment|
|13.||315.||PHPMS||Speller and Meot-Ner (Mautner), 1985||gas phase; Entropy change calculated or estimated, DG<, «DELTA»rH<; M|
+ = 2
By formula: C2N2 + C2F6 = 2C2F3N
|rH°||44.10 ± 0.59||kJ/mol||Eqk||Walker, Sinke, et al., 1970||gas phase; ALS|
Go To: Top, Reaction thermochemistry data, Notes
Speller and Meot-Ner (Mautner), 1985
Speller, C.V.; Meot-Ner (Mautner), M., The Ionic Hydrogen Bond and Ion Solvation. 3. Bonds Involving Cyanides. Correlations with Proton Affinites, J. Phys. Chem., 1985, 81, 24, 5217, https://doi.org/10.1021/j100270a020 . [all data]
Walker, Sinke, et al., 1970
Walker, L.C.; Sinke, G.C.; Perettie, D.J.; Janz, G.J., Enthalpy of formation of trifluoroacetonitrile, J. Am. Chem. Soc., 1970, 92, 4525-4526. [all data]
Go To: Top, Reaction thermochemistry data, References
- Symbols used in this document:
T Temperature rG° Free energy of reaction at standard conditions rH° Enthalpy of reaction at standard conditions rS° Entropy of reaction at standard conditions
- Data from NIST Standard Reference Database 69: NIST Chemistry WebBook
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