Synthesis, structure and properties of the macrocyclic ferrocenophanes with cyclopentadienyl ligands tethered by oligo(ethylene glycol) chain
摘要:
Cyclization reactions of Fe{C(5)H(4)OCH(2)(CH(2)OCH(2))(n)CH(2)OTs} 2 (n = 1, 2) with C(6)H(4)-1,2-(OH)(2),C(6)H(4)-1,3-(OH)(2), and Fe(C(5)H(4)OAc)(2) under basic conditions yield the corresponding macrocyclic 1,1'-ferrocenophanes. The ferrocenophane having a pyrido-crown ether structure was also synthesized. These ferrocenophanes were characterized by X-ray crystallography and NMR spectroscopy. Cyclic voltammograms of the ferrocenophanes exhibited reversible redox peaks assigned to the oxidation and reduction of the ferrocene unit. The macrocyclic pyrido-containing ferrocenophane forms pseudorotaxane with [NH(2){(CH(2))(9)Me}(2)]BARF (BARF = B{C(6)H(3)-3,5-(CF(3))(2)}(4)) in CDCl(3). (C) 2010 Elsevier B.V. All rights reserved.