Laser photolysis, azoalkanes

The expected tricycloalkane (17) is the major product of irradiation of the azoalkane (18) in benzene.Photolysis using an 18 W argon laser, however,... 

Alkyl radicals are conveniently generated by photodecomposition of azoalkanes. A kinetic study of the rearrangement of cyclopropyl radicals (1), obtained by photolysis of the azoalkanes (2), has been described. Particularly high radical concentrations leading to a dramatic change in the product ratio of tetrakis(pentafluoro-ethyl)hydrazine and perfluorobutane have been achieved in the pulsed laser excitation of perfluoroazoethane. On photolysis, azosulphonates also function as radical traps, with the formation of hydrazyl radicals as reactive intermediates. ... 

E-Isomerization competes with elimination of nitrogen on irradiation of azoalkanes. Laser flash photolysis studies have shown that isomerization of E-azocumene to -azocunffine is... 

Adam, W., Denninger, U., Finzel, R., Kita, F., Platsc, H., Walter, H., and Zang, G., Comparative study of the pyrolysis, photoinduced electron transfer (PET), and laser-jet and 185-nm photolysis of alkyl-substituted bicychc azoalkanes, /. Am. Chem. Soc., 114,5027, 1992. 

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