On February 28, 1998, Proevska, L. I.; Pojarlieff, I. G. published an article.Computed Properties of 4569-86-2 The title of the article was 1H NMR spectra and structure of safranines. Hindered rotation of the 3-dialkylamino group in 7-azo derivatives. And the article contained the following:
The 1H NMR spectra of safranine derivatives are reported. Semiempirical calculations indicate that the high shielding of the 4- and 6-proton adjacent to an amino or hydroxyl group (resonating between 5.5 and 6.0 ppm) is due to accumulation of neg. charge on the 4-and 6-C atoms, augmented by the magnetic anisotropy effect of the orthogonal 5-Ph ring. The ortho protons of the latter resonate up field to the meta and para protons. Hindered rotation of dialkylamino groups, altogether unexpected in view of the rather low barriers in similar anilines, is observed only in the azo derivatives AM1 suggests that this is due to destabilization of the transition state when an amino group is substituted for an azo group. The experimental process involved the reaction of 3-Amino-7-(diethylamino)-5-phenylphenazin-5-ium chloride(cas: 4569-86-2).Computed Properties of 4569-86-2
The Article related to azo derivative safranine hindered rotation, alkylamino hindered rotation safranine derivative, Dyes, Organic Pigments, Fluorescent Brighteners, and Photographic Sensitizers: Heterocyclics and other aspects.Computed Properties of 4569-86-2
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