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A Non-Cope among the Cope Rearrangements of 1,3,4,6-Tetraphenylhexa-1,5-dienes

✍ Scribed by Doering, W. von E.; Birladeanu, Ludmila; Sarma, Keshab; Blaschke, G.; Scheidemantel, Ursula; Boese, R.; Benet-Bucholz, Jordi; Klärner, F.-G.; Gehrke, Jan-Stephan; Zimny, Bernd Ulrich; Sustmann, R.; Korth, Hans-Gert

Book ID
126193254
Publisher
American Chemical Society
Year
2000
Tongue
English
Weight
296 KB
Volume
122
Category
Article
ISSN
0002-7863

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## Abstract The classical rules for __Cope__ rearrangements predict a transition state with chair form to be favored over the boat form. On the other hand, bridged homotropylidenes, which allow only a boat‐form transition state by steric reasons, have extremely low barriers. A controversy about the