1938
DOI: 10.1002/hlca.193802101131
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Untersuchungen über die Struktur heterocyclischer, aromatischer Verbindungen mit Deuterium als Indikator. II

Abstract: Die Besonderheiten des aromatischen Charakters, die sich aus dem Verhalten des Benzols ableiten lassen, zeigen auch einige andere Ringsysteme, wie Pyridin, Pyrazin und Funfringe wie Thiophen, Furan, Oxazol, Thiazol, Imidazol, Pyrazol u. a. Das Gemeinsame dieser Verbindungen wurde besonders deutlich im Vergleich mit dem von Wiblstcitter und Waser2) hergestellten Cyclo-octatetraen Dieses ,,sollte wie das Benzol ,,gesiittigten" Charakter besitzen, wahrend die tatsiichlichen Beobachtungen es als Analogon der unges… Show more

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Cited by 12 publications
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“…The explanation proposed by Erlenmeyer was based on the theory of resonance and concluded that exchange at the 4-position was possible because of the existence of tautomeric molecules such as 247 (507,508). Pullman and Metzger discussed these conclusions in terms of HMO theory and suggested that the 5-carboxylic group contributes to the lability of the 4-methyl protons (6).…”
mentioning
confidence: 99%
“…The explanation proposed by Erlenmeyer was based on the theory of resonance and concluded that exchange at the 4-position was possible because of the existence of tautomeric molecules such as 247 (507,508). Pullman and Metzger discussed these conclusions in terms of HMO theory and suggested that the 5-carboxylic group contributes to the lability of the 4-methyl protons (6).…”
mentioning
confidence: 99%