Hexafluorophosphate salts of cyclopentadienyliron(II) complexes of dibenzodioxin and 1-methyldibenzodioxin

Abstract

The structures of ([eta superscript 5]-cyclopentadienyl)[(1,2,3,4,4a,10a-[eta superscript 6])-dibenzo[b,e][1,4]dioxin]iron(II) hexafluorophosphate (1), [Fe(C[subscript 5]H[subscript 5])(C[subscript 12]H[subscript 8]O[subscript 2])]PF[subscript 6], and ([eta superscript 5]-cyclopentadienyl)[(1,2,3,4,4a,10a-[eta superscript 6])-1-methyldibenzo[b,e][1,4]dioxin]iron(II) hexafluorophosphate Et[subscript 2]O solvate (2), [Fe(C[subscript 5]H[subscript 5])(C[subscript 13]H[subscript 10]O[subscript 2])]PF[subscript 6].0.5C[subscript 4]H[subscript 10]O, were detd. The dihedral angle between the outer rings of dibenzodioxin is 175.8(2) in (1) and 177.55(19)° in (2). The planes of the coordinated arene and cyclopentadienyl (Cp) rings are nearly parallel for both complexes. The Fe atom is centered above the Cp ring while Fe-C distances involving the quaternary C atoms of the coordinated arene rings are slightly longer than those involving the other aromatic C atoms, particularly for complex (2). In the central dioxin ring of both complexes, O-C bonds of the coordinated ring are shorter than those of the uncoordinated ring.