Effect of methyl substituent on the ultraviolet spectra of some aza aromatics was written by Das, Bimal Kumar. And the article was included in Journal of the Indian Chemical Society in 1968.Electric Literature of C7H9NO This article mentions the following:
The shift in the longest wavelength absorption band of Me substituted pyrazine, pyrimidine, pyridazine, and pyridine 1-oxide is theoretically calculated The calculation shows fair agreement with exptl. determined values. In the experiment, the researchers used many compounds, for example, 3,5-Dimethylpyridine 1-oxide (cas: 3718-65-8Electric Literature of C7H9NO).
3,5-Dimethylpyridine 1-oxide (cas: 3718-65-8) belongs to pyridine derivatives. In contrast to benzene, Pyridine’s electron density is not evenly distributed over the ring, reflecting the negative inductive effect of the nitrogen atom. Pyridine, its benzo and pyridine-based compounds play diverse roles in organic chemistry. Pyridine-based materials are valued for their optical and physical properties as well as their medical potential. Electric Literature of C7H9NO