Crystal structure of (#mu#-oxo)bis {aquatris(2-pyridylmethyl)amine}iron(III) perchlorate

摘要

The complex [{Fe(tmpa)(H_2O)}_2O](ClO_4)_4.2H_2O.0.25C_2H_5OH contains a near-linear, dinuclear cation (FeOFe angle=176.1(5) deg) with average Fe-#mu#-O~(2-) (1.783(7) A), Fe-apical N (2.244(11) A), Fe-pyridyl N (2.125(10) A) and Fe-O(aqua) (2.082(8) A bond lengths that are essentially identical for the two iron centers. Both tmpa apical nitrogen atoms are trans to the oxo bridge, in contrast to the unsymmetric structure of [(OH)(tmpa)FeOFe(tmpa)(H_2O)]~(3+), for which one apical N atom is trans to the #mu#-O~(2-) group while the other is trans to the hydroxo ligand.