Organometallics p. 2480 - 2485 (1994)
Update date:2022-08-17
Topics:
Cunningham Jr., Allan F.
(Pentadeuteriocyclopentadienyl)cyclopentadienyliron(II), 4, was prepared by the sequential addition of lithium tris(trimethylsilyl)cyclopentadienide and lithium pentadeuteriocyclopentadienide to FeBr2 followed by fluoride-induced removal of the trimethylsilyl groups of the resulting ferrocene 3. Analysis of the deuterium content of the acetylferrocene 5 and the 1,1′-diacetylferrocene 7, obtained from the Friedel-Crafts acetylation of 4, reveals that the former is formed by initial exo attack of AlCl3-CH3COCl, whereas precomplexation of the electrophile at the metal center (endo attack) precedes the formation of the latter.
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