Aggregation of dinuclear {Fe2hpdta} units to form polynuclear oxy/hydroxy-bridged Fe(III) coordination complexes.
An approach for the preparation of oxy/hydroxy briged Fe(III) clusters that takes advantage of hydrolytic condensations of well defined {Fe(2)hpdta(H(2)O)(4)} building units is presented. Co-ligands such as tripodal H(3)tea or bidentate organic bases such as ethylenediamine (enH(2)) can be used to complete the coordination spheres of the Fe(III) centres and stabilise unsymmetrical iron-oxo clusters with non-zero magnetic ground spin-states. This strategy led to the isolation of a pentanuclear complex [Fe(5)(μ(3)-O)(hpdta)(H(2)tea)(Htea)(2))(tea)]·{N(C(2)H(4)OH)(3)}·2EtOH·7H(2)O (1) and a nonanuclear coordination complex [Fe(9)(μ(3)-O)(5)(μ-OH)(5)(en)(6)(hpdta)(2)](NO(3))(2)·7H(2)O (2).
Schmitt
Wolfgang
W
School of Chemistry & Centre for Research on Adaptive Nanostructures and Nanodevices, University of Dublin, Trinity College, Dublin 2, Ireland. schmittw@tcd.ie
Zhang
Lei
L
Anson
Christopher E
CE
Powell
Annie K
AK