13C and 1H NMR of Arylnitrones. Substituent Effects of α-Phenyl-N-(p-substituted phenyl)nitrones

Article abstract of DOI:10.1246/bcsj.60.3607

Substituent effects on the chemical shifts of the conjugation sites in α-phenyl-N-arylnitrones (2) have been investigated.Resonance effects predominate at these positions.The electronic effects of the substituents should be treated separately between electron-donating groups and electron-donating groups and electron-withdrawing ones.A plausible mechanism for the transmission of substituent effects in 2 has been proposed.