Free radicals derived from 1,4-diaza-1,3-butadienes. I. Esr of adducts with silyl, germyl and stannyl radicals and of the diprotonated radical cation

Silyl, germyl and stannyl radicals add to N,N?-di-t-butyl-1,4-diaza-1,3-butadiene (t-Bu-DAB) to give cis and trans isomers of 1-azaallylic radicals. Similar isomers have also been observed in the ESR spectrum of the diprotonated t-Bu-DAB radical cation. © 1983.