Electron spin resonance of t-alkyl-, silyl-, and germyl-aminyl radicals and some observations on the amides MBr{N(SiMe3)2}3(M = Ge, Sn, or Pb)

Abstract

The e.s.r. spectra of the π-radicals :NRR′(R = R′= GeMe₃, SiEt₃, or CMe₃; or R = CMe₃ and R′= SiMe₃; or NR₂= 2,2,6,6-tetramethylpiperidyl), obtained by photolysis of M(NRR′)₂(M = Ge or Sn), are reported; the tetravalent title compounds, prepared by oxidative addition of BrN(SiMe₃)₂ to M′{N(SiMe₃)₂}₂(M′= Ge, Sn, or Pb), are not sources of aminyls, but reduction of GeBr{N(SiMe₃)₂}₃ provides a convenient route to Ge{N(SiMe₃)₂}₃.