TY - JOUR
T1 - Controlled design of oligomeric ethers with pendant cyclopentadienyliron moieties
AU - Abd-El-Aziz, Alaa S.
AU - De Denus, Christine R.
AU - Zaworotko, Michael J.
AU - MacGillivray, Leonard R.
PY - 1995
Y1 - 1995
N2 - Synthetic strategies for the design of oligomeric ethers with pendant cyclopentadienyliron moieties have been developed. A wide range of these materials have been prepared via nucleophilic aromatic substitution reactions of a mono- or di-hydroxyaromatic nucleophiles and a variety of chloroarene complexes under mild experimental 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, [(η5-C5H5)Fe(η6-C 6H5)-o-XC6H4X-(η 6-C6H5)Fe(η5-C5H 5)]2+ (X = O or S) and [(η5-C5H5)Fe(η6-C 6H5)-m-OC6H4O-(η 6-C6H5)Fe(η5-C5H 5)]2+, have been determined by X-ray crystal structure analysis. A number of routes to the synthesis of the oligomeric species (tri-, tetra- and hexa-iron moieties) have been investigated to determine the flexibility and efficiency of the proposed strategies, and these materials have been fully characterized using spectroscopic and analytical techniques. To prove further the structures of these complexes, some of them have been prepared using different starting materials, giving the same proposed products. A series of polyiron complexes containing terminal hydroxy groups have also been prepared and used as dinucleophiles. The systematic increase in the number of rings and iron moieties allowed full characterization by monitoring the changes in the NMR spectra. Furthermore, the possibility of preparing homo- and mixed-polyaromatic ethers where the number of cyclopentadienyliron moieties varied from two to thirty-five has been demonstrated.
AB - Synthetic strategies for the design of oligomeric ethers with pendant cyclopentadienyliron moieties have been developed. A wide range of these materials have been prepared via nucleophilic aromatic substitution reactions of a mono- or di-hydroxyaromatic nucleophiles and a variety of chloroarene complexes under mild experimental 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, [(η5-C5H5)Fe(η6-C 6H5)-o-XC6H4X-(η 6-C6H5)Fe(η5-C5H 5)]2+ (X = O or S) and [(η5-C5H5)Fe(η6-C 6H5)-m-OC6H4O-(η 6-C6H5)Fe(η5-C5H 5)]2+, have been determined by X-ray crystal structure analysis. A number of routes to the synthesis of the oligomeric species (tri-, tetra- and hexa-iron moieties) have been investigated to determine the flexibility and efficiency of the proposed strategies, and these materials have been fully characterized using spectroscopic and analytical techniques. To prove further the structures of these complexes, some of them have been prepared using different starting materials, giving the same proposed products. A series of polyiron complexes containing terminal hydroxy groups have also been prepared and used as dinucleophiles. The systematic increase in the number of rings and iron moieties allowed full characterization by monitoring the changes in the NMR spectra. Furthermore, the possibility of preparing homo- and mixed-polyaromatic ethers where the number of cyclopentadienyliron moieties varied from two to thirty-five has been demonstrated.
UR - http://www.scopus.com/inward/record.url?scp=37049068014&partnerID=8YFLogxK
U2 - 10.1039/DT9950003375
DO - 10.1039/DT9950003375
M3 - Article
AN - SCOPUS:37049068014
SN - 1472-7773
SP - 3375
EP - 3393
JO - Journal of the Chemical Society, Dalton Transactions
JF - Journal of the Chemical Society, Dalton Transactions
IS - 20
ER -