| Abstract: | Hydrocarbon-bridged Metal Complexes. XLVII. Bis-, Tris- und Tetrakis(ferrocenyl)-1,3-Diketones Claisen condensation of the enolate from acetylferrocene with diethyloxalate, 1,8-octanedicarboxylic dimethyl ester, fumaroyl dichloride, the chlorides of terephthalic acid and of 1,3,5-benzenetricarboxylic acid, tetramethyl-1,2,4,5-benzene tetracarboxylate and with 3,6-di-t-butyl-9,9′-dimethyl-xanthene-1,8-dicarboxylic dimethyl ester gives the corresponding bis-, tris- and tetrakis(ferrocenyl)-1,3-diketones 2 – 8 . Their oxidation potentials were measured by cyclovoltammetry. Diferrocenoyl methane exists in the crystal as the keto-enol tautomer. |
