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Synthesis and Properties of 1‐Cycloheptatrienylidene‐2‐cyclopentadienylidene‐ethylene Derivatives
Author(s) -
Toda Takashi,
Shimazaki Norihiko,
Mukai Toshio
Publication year - 1987
Publication title -
angewandte chemie international edition in english
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 5.831
H-Index - 550
eISSN - 1521-3773
pISSN - 0570-0833
DOI - 10.1002/anie.198703351
Subject(s) - cumulene , ethylene , ring (chemistry) , aryl , resonance (particle physics) , chemistry , computational chemistry , carbon 13 nmr , materials science , stereochemistry , organic chemistry , molecule , physics , atomic physics , catalysis , alkyl
How important is the resonance formula 1′ for describing the properties of 1? The influence of the aryl substituents of the five‐membered ring on the position of the stretching vibration of the cumulene bond and the 13 C‐NMR spectrum indicate that 1 ′ has some, but not all too great, importance. The derivatives of 1 , which were obtained in acceptable yields, moreover, show very seldomly observed emission from an S 2 state.