The synthesis and characterization of 11 inert diradicals of the perchlorotriphenylmethyl class, (p)R-C-6-Cl-4(C6Cl5)C-C6Cl4-Sp-C6Cl4-C(C6Cl5)-C6Cl4-R(p) where R is Cl, OH, or O- and Sp is a spacer chain from zero to nine atom links, are described. The ESR spectra of these species in solution from room temperature to -140 degrees C (glassy matrix) point to the concurrence of two isomeric diradical forms: the conventional species, displaying spin-spin dipolar interaction, and a form apparently devoid of it. The ESR C-13 hyperfine couplings, the magnetic susceptibility, and the IR and UV-vis spectra of these diradicals are described. Some related monoradicals and a triradical are also reported.
Unique single-electron transfers between chemically inert triphenylmethyl radicals and triphenylmethyl anions
作者:Manuel Ballester、Isabel Pascual、Josep Torres
DOI:10.1021/jo00297a017
日期:1990.5
BALLESTER, M.;RIERA, J.;CASTANER, J.;ONRUBIA, C.;UBIERNA, J. J., TETRAHEDRON LETT., 1983, 24, N 20, 2121-2124
作者:BALLESTER, M.、RIERA, J.、CASTANER, J.、ONRUBIA, C.、UBIERNA, J. J.
DOI:——
日期:——
BALLESTER, M.;RIERA, J.;CASTANER, J.;ONRUBIA, C.;UBIERNA, I. J., AN. QUIM. PUBL. REAL SOC. ESP. QUIM., 1985, 81, N 3, 262-266
作者:BALLESTER, M.、RIERA, J.、CASTANER, J.、ONRUBIA, C.、UBIERNA, I. J.
DOI:——
日期:——
Nucleophilic substitution of chlorine in triphenylmethyl radicals. Reverse effect and a related single-electron transfer