| Abstract |
ESR and ENDOR spectra are reported of several symmetrical substituted N,N,N ,N -tetraalkyl-p-phenylenediamine radical cations in solution. Different N,N -alkyl substituted paraphenylenediamines, like the ethyl, n-propyl, and iso-propyl derivative are compared with the parent N,N,N, ,N -tetramethyl-p-phenylenediamine (Wurster s Blue Cation). N,N,N ,N -Tetrabenzyl-p-phenylenediamine, 1,4-dipyrrolidinylbenzene, and N,N -bis[4-(dimethylamino)phenyllpiperazine are additionally investigated. Experimental and calculated hyperfine coupling constants are compared. Characteristic UV-VIS data and redox potentials in acetonitrile are reported, together with the syntheses of the compounds. |
