Ammonium cyamelurates: synthesis and crystalline structures
| Autor: | Viktor A. Tafeenko, Leonid A. Aslanov, A. A. Lobova, A. S. Bushmeleva, V. N. Zakharov |
|---|---|
| Rok vydání: | 2018 |
| Předmět: |
Heptazine
010405 organic chemistry Hydrogen bond Triad (anatomy) 010402 general chemistry Condensed Matter Physics 01 natural sciences Exfoliation joint 0104 chemical sciences Ion chemistry.chemical_compound Crystallography medicine.anatomical_structure chemistry medicine Ammonium Physical and Theoretical Chemistry Derivative (chemistry) |
| Zdroj: | Structural Chemistry. 30:425-434 |
| ISSN: | 1572-9001 1040-0400 |
| DOI: | 10.1007/s11224-018-1187-0 |
| Popis: | Contradictory literature on the alkali-assisted exfoliation of the melon and searching for the best precursors for different heptazine derivative synthesis led us to the synthesis of two cyameluric acid salts, (NH4)2[C6N7O3H] (ECN3) and (NH4)2(H9O4)[C6N7O3] (ECN5). These salts were characterized by single-crystal X-ray diffractometry for the first time. Ammonium cations bind C6N7O3H2− anions (ECN3) by means of Coulombic compression and hydrogen bonds. In ECN5, stability of the columns consisting of C6N7O33− anion triads is provided by Coulombic compression and hydrogen bonds between anions, ammonium cations, and hydroxonium (H9O4+). The planar cyamelurate anions of one triad are located strictly above each other with the distance of 3.710(3) A between the neighbor anions. Each triad is twisted relative to the adjacent one by an angle of 60° and is distant by 3.605(3) A. |
| Databáze: | OpenAIRE |
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