Jump to main content
Jump to site search

Issue 35, 2008
Previous Article Next Article

Synthesis, structures and catalytic properties of iron(III) complexes with asymmetric N-capped tripodal NO3 ligands and a pentadentate N2O3 ligand

Author affiliations

Abstract

A new family of N-capped tripodal NO3 proligands N,N-bis(2-hydroxy-3,5-di-tert-butylbenzyl)-N-(2′-hydroxy-5′-R-phenyl)amine [H3(Ln)] [when R= Me, n = 1; R= tBu, n = 2; R = Cl, n = 3] with different substituents in one of the aryl rings and N,N-bis(2-hydroxy-3-tert-butylbenzyl)-N-(2′-hydroxy-5′-methylphenyl)amine [H3(L4)] were synthesised. The preparation of a new pentadentate proligand N-methyl-N,N′,N′-tris(2-hydroxy-3,5-di-tert-butylbenzyl)ethane-1,2-diamine [H3(L5)] with an N2O3 donor set is also reported. Reaction of the proligands [H3(Ln)] (n = 1–4) with iron(III) chloride in the presence of base (triethylamine) and 1-methylimidazole (1-Meim) as co-ligand led to the formation of iron complexes of the type [Fe(Ln)(1-Meim)] (n = 1–4) (1–4) respectively, while treatment of the trilithium salt of [H3(L5)] with iron(III) chloride afforded [Fe(L5)] (5). All complexes were structurally characterised by X-ray crystallography. In complexes 1–4, the ligands form five- and six-membered chelate rings with the iron centres which have distorted trigonal bipyramidal geometry with an N2O3 coordination environment. Complex 5 adopts a similar distorted trigonal bipyramidal geometry also with N2O3 coordination around the iron centre. The catalytic activity of these iron complexes towards epoxidation of styrene was examined.

Graphical abstract: Synthesis, structures and catalytic properties of iron(iii) complexes with asymmetric N-capped tripodal NO3 ligands and a pentadentate N2O3 ligand

Back to tab navigation
Please wait while Download options loads

Supplementary files

Publication details

The article was received on 14 Mar 2008, accepted on 23 May 2008 and first published on 15 Jul 2008


Article type: Paper
DOI: 10.1039/B804414G
Citation: Dalton Trans., 2008, 4784-4791
  •   Request permissions

    Synthesis, structures and catalytic properties of iron(III) complexes with asymmetric N-capped tripodal NO3 ligands and a pentadentate N2O3 ligand

    L. H. Tong, Y. Wong, S. I. Pascu and J. R. Dilworth, Dalton Trans., 2008, 4784
    DOI: 10.1039/B804414G

Search articles by author