Controlled design of oligomeric ethers with pendant ...
|Title||Controlled design of oligomeric ethers with pendant cyclopentadienyliron moieties.|
|Author(s)||A. Abd-El-Aziz, C. de Denus, M. Zaworotko, L. MacGillivray|
|Journal||Section Title: Organometallic and Organometalloidal Compounds, Journal of the Chemical Society, Dalton Transactions: Inorganic Chemistry|
|Abstract||Synthetic strategies for the design of oligomeric ethers with pendant cyclopentadienyliron moieties were developed. A wide range of these materials were prepd. via nucleophilic arom. substitution reactions of mono- or di-hydroxyarom. nucleophiles and a variety of chloroarene complexes under mild exptl. conditions. The mono- and bis-(cyclopentadienyliron) arene complexes were used as building blocks for the larger systems. The crystal structures of three bis(cyclopentadienyliron) arene dications, [(Î·5-C5H5)Fe(Î·6-C6H5)-o-XC6H4X-(Î·6-C6H5)Fe(Î·5-C5H5)]2+ (X = O or S) and [(Î·5-C5H5)Fe(Î·6-C6H5)-m-OC6H4O-(Î·6-C6H5)Fe(Î·5-C5H5)]2+, were detd. by x-ray crystal structure anal. A no. of routes to the synthesis of the oligomeric species (tri-, tetra- and hexa-Fe moieties) were studied to det. the flexibility and efficiency of the proposed strategies, and these materials were fully characterized using spectroscopic and anal. techniques. To prove further the structures of these complexes, some of them were prepd. using different starting materials, giving the same proposed products. Polyiron complexes contg. terminal hydroxy groups also were prepd. and used as dinucleophiles. The systematic increase in the no. of rings and Fe moieties allowed full characterization by monitoring the changes in the NMR spectra. Also, the possibility of prepg. homo- and mixed-polyarom. ethers where the no. of cyclopentadienyliron moieties varied from two to thirty-five was demonstrated. [on SciFinder(R)]|
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