PROPERTIES OF TRIPLET TETRACHLORO-4-PYRIDYLNITRENE ISOLATED IN INERT MATRICES
Keywords:
azides, nitrenes, pyridines, IR spectroscopy, matrix isolation, photolysis, EPRAbstract
Photolysis of 4-azidotetrachloropyridine isolated in inert matrices at low temperatures leads to formation of triplet tetrachloro-4-pyridylnitrene as the sole product of the photochemical reaction. In the EPR spectrum, this nitrene gives an intense signal and is characterized by zero-field splitting parameters. The UV spectrum of nitrene in solid argon contains a series of high-intensity and medium-intensity absorption bands. The IR spectrum in solid argon agrees well with nonempirical and semiempirical calculations. On exposure to light, nitrene easily reacts with molecular carbon(II) oxide, forming the corresponding isocyanate. Irradiation with light does not result in formation of bicyclic azirine, but initiates the reverse reaction of fixation by nitrene of the molecular nitrogen contained in the solid argon, leading to the starting azide.
How to Cite
Chapyshev, S. V.; Wentrup, C. Chem. Heterocycl. Compd. 2001, 37, 1119. [Khim. Geterotsikl. Soedin. 2001, 1219.]
For this article in the English edition, see DOI https://doi.org/10.1023/A:1013283817500
