Synthesis and Characterization of a New Cyclotriphosphate [C₈H₁₁NH₃]₃P₃O₉·3H₂O

Abstract

Among the various categories of phosphates, the number of organic cation cyclotriphosphates remains limited. In this work, we report the chemical preparation, crystal structure, thermal analysis, and spectroscopic investigations of a new cyclotriphosphate [C₈H₁₁NH₃]₃P₃O₉·3H₂O. It is characterized by X-ray diffraction, infrared spectroscopy, nuclear magnetic resonance, and thermal analysis. This compound is a triclinic P unit cell with the following parameters: a = 13.949(4), b = 9.867(3), c = 14.180(2) Å, α = 92.22(2), β = 119.27(2), γ = 85.10(10)°, V = 1696.1(8) Å ³ , and Z = 2. Its structure has been determined and refined to R = 0.041 and R_w = 0.062, using 4527 independent reflections. The atomic arrangement can be described by corrugated thick layers built by [P₃O₉]^3- anions, ammonium groups, and water molecules. The organic entities are located between these layers. H-bonds connecting the different species play an important role in the tridimensionnal network cohesion. This compound is also characterized by infrared spectroscopy, nuclear magnetic resonance, and thermal analysis.

Keywords:

• Chemical synthesis
• crystal structure
• infrared spectroscopy
• X-ray diffraction

Acknowledgments

We would like to thank the Ministry of Scientific Research Technology and Competing Development of Tunisia for its finantial support.