Abstract

Exposure of dichloromethane solution of [OEOPFe(BF4)], where OEOP is the monoanion of octaethyloxoporphyrin, to dioxygen results in its transformation into the μ-oxo bridged compound, [(OEOPFe)2O)](BF4)2. The molecular structure of the title compound, [(OEOPFe)2O](BF4)2, was determined by single-crystal X-ray diffraction. It contains a binuclear centrosymmetric [(OEOPFe)2O]2+ cation (the bridging O atom lies on an inversion centre) and two tetrafluoroborate anions. The Fe atom is five-coordinate to four N atoms of the porphyrin ring and to one bridging O atom. The compound is characterized by an average Fe–N bond length of 2.064 A. The Fe–O bond distance is 1.7665(11) A and the Fe–O–Fe bond angle is 180.0° and the two porphyrin rings are parallel. Crystal data: crystal system, monoclinic, a = 8.867(3), b = 26.104(9), c = 15.748(6) A, β = 105.40(3)°, space group, P21/c, V = 3514(2) A3, Z = 2.

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