Photochemistry of 2H-Azirine - Formation of Nitrile Ylide Evidenced by Laser Flash Photolysis and Pulse Radiolysis -

Article abstract of DOI:10.1246/bcsj.64.2757

Laser flash photolysis of 3-(4-biphenylyl)-2H-azirine (AZ) was carried out in cyclohexane for the direct detection of a nitrile ylide (NY).Two kinds of transient species, triplet AZ (T₁) and NY, have been measured.Decay rates of these species were determined to be 6.7x10⁵ s^-1 (T₁) and 8x10s^-1(NY).The rate constants for the reactions of NY toward acetone and acrylonitrile were determined to be 2.5x10³ dm³mol^-1s^-1 and 2.3x10⁶ dm³ mol^-1 s^-1, resepctively.These results were supported by the results of pulse radiolysis of AZ in benzene and stational irradiations of AZ.