Proton Magnetic Resonance Spectra of Nitronaphthalenes in Dimethylacetamide Solution

Abstract

Examination of the proton magnetic resonance spectra of some methyl and dimethyl derivatives of 1- and 2-nitronaphthalene has allowed assignments of spectral regions to the various ring protons to be made. The individual proton resonances and overall spectral patterns correspond well with those predicted from studies of the dinitronaphthalenes and dimethylnaphthalenes. Steric crowding in 2-methyl-1-nitronaphthalenes appears to reverse the proximity effect of the nitro group on the peri-hydrogen.