1233220-84-2Relevant academic research and scientific papers
Branching the electron-reservoir complex [Fe(η5-C 5H5)(η6-C6Me6)] [PF6] onto large dendrimers: "click", amide, and ionic bonds
Djeda, Rodrigue,Ornelas, Catia,Ruiz, Jaime,Astruc, Didier
, p. 6085 - 6101 (2010)
Several strategies have been used to functionalize 1,3,5-trisubstituted arene-cored dendrimers with the organometallic electron-reservoir moiety [Fe(η5-C5H5)(η6-C 6Me6)]+, 1, to provide dendritic multielectron reservoirs. They all start from the carboxylic acid [Fe(η5-C 5H4COOH)(η6-C6Me 6)][PF6], 2, or its acyl chloride derivative [Fe(η5-C5H4COCl)(η6-C 6Me6)][PF6], 3. For this purpose, a series of new polyamine dendrimers from G0 to G2 with 1→ 3 C connectivity of the branching to the core have been synthesized. Amide, "click" and ionic ammonium carboxylate linkage successfully provided G0, G1, and G2 metallodendrimers with 9, 27, and 81 cationic terminal organoiron groups respectively. Further construction of large metallodendrimers up to G7 with approximately 14 000 organoiron termini was only possible by combining amide, "click", and tether lengthening strategies to avoid steric bulk at the dendrimer periphery. Reduction of the 18-electron FeII metallodendrimers, exemplified by a G4-DAB-64-FeII complex, was achieved exergonically using the parent electron-reservoir complex [Fe(η5-C5H 5)(η6-C6Me6)], 1a, at ?30 °C in MeCN, which allowed further reduction of 64 equiv of C60 to C60·? using the 19-electron FeI metallodendrimer.
