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Synthesis, electronic spectra, and crystal structural properties of fluorinated [3(3)](1,3,5)cyclophanes
T Koga1, M Yasutake, T Shinmyozu
1Institute for Fundamental Research of Organic Chemistry (IFOC) and Department of Chemistry, Graduate School of Science, Kyushu University, Hakozaki, Fukuoka 812-8581, Japan.
Organic Letters
|June 5, 2001
Abstract:
[structure: see text] Trifluoro- and hexafluoro[3(3)](1,3,5)cyclophanes 3 and 4 were synthesized with TosMIC coupling as a key reaction. The pi-pi absorption bands show blue shifts as the number of fluorine atoms is increased. In the crystalline state, characteristic stacking with the fluorinated benzene rings facing each other is observed in both cases.