N,N'-Bis(arylthio)arenecarboximidamidyl Radicals. An Electron Spin Resonance Spectroscopic Study of a New Class of Persistent Nitrogen-Centered Free Radicals
N,N'-Bis(arylthio)arenecarboximidamidyl radicals (3), ArSN(radical)C(Ar')=NSAr, have been studied by electron spin resonance (ESR) spectroscopy.Radicals 3 have been generated by oxidation of ArSNHC(Ar')=NSAr with PbO2 or Ag2O and by photolysis of (ArS)2NC