1911
DOI: 10.1002/jlac.19113810206
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Die Konstitution des Auramins

Abstract: Ber. d. d. chem. Ges. 37, 4607 (1904); K. A. H o f m a n n , M e t z l e r uud L e c h e r , Ber. d. d. chem. Ges. 43, 181 (1910). *) Ber. d. d. chem. Ges. 37, 4606 (1904). 3 , Sorgfiiltig gereinigte Auraminbase ist, wie im Gegensatz zu den Angaben von F e h r m a n n nnd G r a e b e gezeigt wurde, vollig fnrblos, wiihrend die entsprechende Carbonylverbindung, das Mi c hlersche Reton, auch in ganz reinem Zustande stets einen deutlichen Stich ins Gelbe zeigt (Graebe, Ber. d. d. chem. Ges. 20, 3262 [1887]). Also… Show more

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Cited by 16 publications
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“…Upon the addition of acid to this benzoyl derivative, its color changes very sharply from pale yellow to intense violet. This color change in similar compounds was attributed by Semper (7) to salt formation on one of the amino nitrogen atoms and conversion of one of the nuclei from the benzenoid to the quinoid form: The quinoid form exhibits marked dichroism. In concentrated solution or in a deep layer it is red-violet, while in dilute solution or in a thin layer it is blue.…”
mentioning
confidence: 69%
“…Upon the addition of acid to this benzoyl derivative, its color changes very sharply from pale yellow to intense violet. This color change in similar compounds was attributed by Semper (7) to salt formation on one of the amino nitrogen atoms and conversion of one of the nuclei from the benzenoid to the quinoid form: The quinoid form exhibits marked dichroism. In concentrated solution or in a deep layer it is red-violet, while in dilute solution or in a thin layer it is blue.…”
mentioning
confidence: 69%