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- W1993251801 abstract "Abstract Tetrafluoro- and octafluorodibenzobarrelenes (1,2) are readily prepared by reaction of tetrafluorobenzyne (from C 6 F 5 MgBr) with naphthalene and tetrafluoronaphthalene, respectively. Cycloaddition (4+2) of tetracyclone to 1 and 2 at 180° leads to the polyfluoroanthracenes (3,4) in high yields. The reactions of dibenzobarrelenes with anthracenes (with fluorine in either reactant) afford the vis- a-visenes (nee janusenes) 5 and 6, in which phenyl and tetrafluorophenyl rings are disposed in a close facial relationship. Compound 5, which is formed in regiospecific reactions, exhibits an ultraviolet spectrum characteristic of a donor-acceptor interaction between proximate -C 6 H 4 - and -C 6 F 4 - rings. NMR spectra also support the structure of 5." @default.
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- W1993251801 date "1985-08-01" @default.
- W1993251801 modified "2023-09-24" @default.
- W1993251801 title "Polyfluoroaromatics. The interrelated chemistry of barrelenes, anthracenes and vis-à-visenes" @default.
- W1993251801 doi "https://doi.org/10.1016/s0022-1139(00)83348-5" @default.
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