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Z. Naturforsch. 2013,
68b, 207 – 213
doi:10.5560/ZNB.2013-3023
Derivatives of the Triaminoguanidinium Ion, 2. Prototropic Tautomerism, Crystal and Molecular Structure of N,N′,N′′-Tris(propan-2-iminyl)guanidine
Institut für Organische Chemie I, Universität Ulm, Albert-Einstein-Allee 11, 89081 Ulm, Germany
Reprint requests to Prof. Dr. Gerhard Maas. Fax: +49 731 5022803. E-mail:
gerhard.maas@uni-ulm.de
Received January 23, 2013 / published online March 20, 2013
Dedicated to Professor Gerhard Müller on the occasion of his 60th birthday
The title compound, C10H20N6 (2), was prepared from N,N′,N′′-triaminoguanidinium chloride. Solvent- and temperature-dependent 1H NMR spectra indicating prototropic tautomerism were observed in solution. The crystal and molecular structure was determined by X-ray diffraction analysis. The compound crystallizes in the hexagonal space group P63/m. The molecules lie on crystallographic mirror planes parallel to the a,b plane, which are separated from each other by 3.37 Å. The threefold crystallographic symmetry of the molecules is due to disorder with positional averaging of individual molecules.
Key words: Triaminoguanidine, Triaminoguanidinium Salt, Variable-temperature 1H NMR Spectra, Layered Crystal Structure