Nitroxide chemistry. Part XI. Reaction of trifluoronitrosomethane and bis(trifluoromethyl)nitroxide with some cobalt(II) species

Abstract

Trifluoronitrosomethane reacts with alkaline solutions of the cobalt(II) species [Co(CN)₅]^3– and [Co(dmg)₂·H₂O] to afford solutions of the relatively stable nitroxide radicals [CF₃·N(O·)Co(CN)₅]^3– and [CF₃·N(O·)·Co(dmg)₂· H₂O] respectively, the e.s.r. parameters of which are discussed. E.s.r. spectroscopic evidence suggests that under similar conditions the reaction between [Co(CN₅)]^3– and bis(trifluoromethyl)nitroxide leads to the formation of the compound [(CF₃)₂NO·Co(CN)₅]^3–: attempts to isolate this particular complex free from impurities were unsuccessful.