ABSORPTION SPECTRA OF NITRO DERIVATIVES. 2-ALKYLAMINO-4-NITROРIСOLINES AND THEIR N-OXIDES

Abstract

The UV spectra of 15 2-N-substituted 4-nitropicolines and their N-oxides in ethanol have been determined. The spectra of all investigated compounds with the exception of 2-alkylnitramino-4-nitropicolines contain three main bands: two absorption bands are attributed to π→π^* excitation of the π-electron of the aromatic system. The third ICT in the longest wavelength region is assigned to the 4-nitro group via the pyridine ring. The bands in the spectra of 3-methyl derivatives are characterized by smaller intensity than 5-methyl derivatives due to the disturbance of the mutual electronic interaction of the substituent by the steric ortho effect.

How to Cite
Lorenc, J.; Puszko, A. Chem. Heterocycl. Compd. 1998, 34, 674. [Khim. Geterotsikl. Soedin. 1998, 34, 774.]

For this article in the English edition, see DOI https://doi.org/10.1007/BF02252274