Abstract:
A new octanuclear iron(III) isobutyrate cluster [Fe8O3(is)6(O2CH)3(tea)(teaH)3]·teaH3·(CH3)2CO (1) (where
His = isobutyric acid; teaH3 = triethanolamine) has been prepared by the interaction of smaller trinuclear isobutyrate
cluster [Fe3O(is)6(H2O)3](NO3)·2(CH3CN)∙2(H2O) with s-triazine and triethanolamine. Single-crystal X-ray analysis
revealed that 1 crystalizes in the triclinic space group P-1 and comprises octanuclear [Fe8O3(is)6(O2CH)3(tea)(teaH)3]
clusters and solvate teaH3 and acetone molecules. The iron centers in the {Fe8} core are bridged by three μ4-oxo atoms,
and peripheral ligation of the core is provided by six isobutyrates and four triethanolamine ligands. Formate group is
completed the coordination sphere of three metal atoms. Cluster 1 has been also characterized by elemental, infrared
spectroscopy and thermogravimetric analyses.
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