Acetonitrile and nitrogen

There are also not very many data on the photolysis of 1,2,4-triazines. Many 1,2,4-triazines are not only stable to irradiation but they increase the photolytic stability of other systems. Meier tried to prepare trimethylazete (356) by matrix photolysis of trimethyl-1,2,4-triazine (355) but observed only the formation of 2-butyne, acetonitrile and nitrogen (80LA798). Photolysis of tris(heptafluoroisopropyl)-l,2,4-triazine (329) afforded tris(heptafluoroisopropyl)-l,3,5-triazine (357), nitrogen, perfluorobutyronitrile and bis(heptafluoroisopropyl)acetylene. The last three products are the same as in the pyrolysis of (329) <80JCS(P1)2254). 

The preparation of trimethylazete (trimethylazacyclobutadiene) has been attempted by matrix photolysis of 3,5,6-trimethyl-l,2,4-triazine, but the only products observed are but-2-yne, acetonitrile, and nitrogen.427... 

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