title: The chemistry of cyanuric acid (H3C3N3O3) under high pressure and high temperature.
abstract: We have studied cyanuric acid (H(3)C(3)N(3)O(3)) at static pressures up to 8.1 GPa and simultaneous temperatures up to 750 K, using primarily infrared absorption spectroscopy and visual observation. The corresponding phase diagram compares favorably with theoretical predictions of metastable organic materials. Two reactions were observed and characterized; both are irreversible. Below 2 GPa, melting is accompanied by a decomposition reaction, and upon cooling, cyanuric acid is not recovered. Above 2 GPa, heating results in a solid product recoverable at ambient conditions. Corresponding infrared spectra suggest that pressure leads to the formation of heterocycles of increasing complexity and biological potential, with the composition determined by the pressure of formation. Cyanuric acid is of interest at these conditions because it and its monomer, isocyanic acid, are "prebiotic" compounds found in stellar dust clouds, meteorites, and other remnants of the early Earth.
authors.affiliation: Department of Earth & Planetary Science, University of California, Berkeley, 307 McCone Hall, Berkeley, California 94720-4767.
authors.forename: W
authors.initials: W
authors.lastname: Montgomery
authors.forename: J C
authors.initials: JC
authors.lastname: Crowhurst
authors.forename: J M
authors.initials: JM
authors.lastname: Zaug
authors.forename: R
authors.initials: R
authors.lastname: Jeanloz
mesh_terms: D002586:Cesium / Q000737:chemistry; D006571:Heterocyclic Compounds / Q000138:chemical synthesis / Q000737:chemistry; D006358:Hot Temperature; D007454:Iodides / Q000737:chemistry; D044367:Phase Transition; D011312:Pressure; D017550:Spectroscopy, Fourier Transform Infrared; D014227:Triazines / Q000737:chemistry*
chemical_list: D006571:Heterocyclic Compounds; D007454:Iodides; D014227:Triazines; D002586:Cesium; C004632:cyanuric acid; C040050:cesium iodide