In:
Bulletin of the Chemical Society of Japan, Oxford University Press (OUP), Vol. 74, No. 6 ( 2001-06-01), p. 1093-1100
Abstract:
One sesquifulvalene, 9-(cycloheptatrienylidene)fluorene, was found to be composed of a flat fluorenylidene part and a non-planar cycloheptatrienylidene moiety. 1-Substituted 9-(cycloheptatrienylidene)fluorene was not obtained because of a steric repulsion between the 1-substituent and the 7′-hydrogen of the seven-membered ring. Upon consideration of their 13C NMR spectra, the electronic properties of the seven-membered ring are slightly influenced by introducing a substituent (halogen, methoxy group, etc.) on the fluorenylidene part. The dissolution of 9-(cycloheptatrienylidene)fluorene in trifluoroacetic acid–chloroform afforded the (9-fluorenyl)tropylium cation. The substituent attached to the fluorene part also slightly influences the tropylium moiety.
Type of Medium:
Online Resource
ISSN:
0009-2673
,
1348-0634
DOI:
10.1246/bcsj.74.1093
Language:
English
Publisher:
Oxford University Press (OUP)
Publication Date:
2001
detail.hit.zdb_id:
2041163-7
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