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Ammonium cyamelurates: synthesis and crystalline structures

  • A. S. Bushmeleva
  • V. A. Tafeenko
  • V. N. Zakharov
  • A. A. Lobova
  • Leonid A. Aslanov
Original Research
  • 53 Downloads

Abstract

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) Å 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) Å.

Keywords

Melon Ammonium cyamelurate Structure Hydrogen bonds 

Notes

Acknowledgements

This work (XRD study) was supported in part by the M. V. Lomonosov Moscow State University Program of Development. The authors are grateful to V. V. Chernyshev for his kind assistance with the XRD experiment.

Compliance with ethical standards

We did not violate any ethical standards.

Conflict of interest

The authors declare that they have no conflict of interest.

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Copyright information

© Springer Science+Business Media, LLC, part of Springer Nature 2018

Authors and Affiliations

  1. 1.Lomonosov Moscow State UniversityMoscowRussian Federation

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