1955
DOI: 10.1039/jr9550001193
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The fine structure of azulene. Part I. cycloHepta[bc]acenaphthylene and cyclohepta[def]fluorene

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Cited by 26 publications
(19 citation statements)
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“…[32] In 1955, Ward et al further studied whether azulene retains its original properties after fusion with the phenyl group. [33] Accordingly, two structures with different fusion models were selected for preliminary examination: compounds 5 and 5′ (Scheme 1). Based on their resonance forms (Scheme 1b), it was expected that isomer 5 would present typical azulene properties, while 5′ would be a cyclopolyolefin.…”
Section: Synthesis Of Nonalternant Molecules Containing 5-7 Paired De...mentioning
confidence: 99%
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“…[32] In 1955, Ward et al further studied whether azulene retains its original properties after fusion with the phenyl group. [33] Accordingly, two structures with different fusion models were selected for preliminary examination: compounds 5 and 5′ (Scheme 1). Based on their resonance forms (Scheme 1b), it was expected that isomer 5 would present typical azulene properties, while 5′ would be a cyclopolyolefin.…”
Section: Synthesis Of Nonalternant Molecules Containing 5-7 Paired De...mentioning
confidence: 99%
“…PPA: polyphosphoric acid; LiAlH 4 : lithium aluminum hydride; P 2 O 5 : phosphorus pentoxide; HCl: hydrochloric acid. [33] Scheme 2. Synthesis of compound 11.…”
Section: Synthesis Of Nonalternant Molecules Containing 5-7 Paired De...mentioning
confidence: 99%
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“…Es liegen bereits wiederholte Versuche vor, den Kohlenwasserstoff IX zu synthetisieren [13] [23], die aber alle erfolglos verliefen. In Anbetracht der bisher verwendeten Synthesemethoden ware dieses negative Resultat zu erwarten, wenn das System einen ausgepragten Biradikalcharakter besitzt, wie es durch die hier wiedergegebenen Uberlegungen nahegelegt wird.…”
Section: S S S* Tlunclassified
“…~ UV. (CH2C12): 586 (2,56), 367 (4,07), 354 (4,69), 338 (4,53), 298 (4,48), 294 (4,50), 288 (4,42), 247 (4,42). …”
mentioning
confidence: 99%