ISSN print edition: 0366-6352 ISSN electronic edition: 1336-9075 Registr. No.: MK SR 9/7 Published monthly

Electronic Spectra of 2-iV-Substituted Derivatives of 2-Amino-4-nitropicolines I. 2-Alkylamino-3- (or -5)-methyl-4-nitropyridine N-Oxides

J. Lorenc and A. Puszko

Department of Organic Chemistry, University of Economics, PL-53 З42 Wroclaw

Abstract: The UV spectra of 2-methyl- and 2-ethylamino-3- (or -5)-methyl-4-nitropyridine N-oxides in ethanol have been examined and compared with results (transition energies, intensities) of modified INDO calculations in order to make the assignment of allowed bands. The influence of substituents in the molecule on λ_max and ε_max of spectral bands is discussed. The electronic spectra of 2-alkylamino-3- (or -5)-methyl-4-nitropyridine N-oxides and the effect of steric hindrance on the spectra are interpreted. The preparation procedure of four new 2-alkylamino-4-nitropicoline N-oxides is described.

Full paper in Portable Document Format: 526a756.pdf

Chemical Papers 52 (6) 756–761 (1998)