75693-12-8Relevant academic research and scientific papers
Photolysis of matrix-isolated 4-R-1,2,4-triazoline-3,5-diones: Identification of aziridine-2,3-dione transients
Risi, Florence,Pizzala, Louis,Carles, Micheline,Verlaque, Patrick,Aycard, Jean-Pierre
, p. 666 - 670 (2007/10/03)
Matrix-isolated 4-methyl-1,2,4-triazolinedione la and 4-phenyl-1,2,4-triazolinedione 1b were photolyzed at λ335 nm and λ≥310 nm, respectively. The reactions induced by photolysis were monitored by FT-IR spectroscopy. The isocyanates 2a and 2b are always the more abundant products with carbon monoxide. Methyl- and phenylaziridine-2,3-diones (3a and 3b) were detected as minor, but well-identified reaction products. The IR experimental absorption bands were assigned by comparison with literature data and with simulated infrared spectra obtained by ab initio calculation at the 6-31G* level. Stable at the matrix temperature (10 K), 3a and 3b photolyzed to isocyanates and CO when irradiated at λ≥230 nm. Irradiation of 2b at this wavelength induces its decomposition. The kinetic data show that the rate constant process 1a→2a is faster than the 1a→3a process (3.29×10-3 and 2.35×10-4 min-1 respectively).
