[Ph–C(NSiMe3)2]2FeCl; ein Amidinatokomplex von Eisen(III) mit verzerrt trigonal-bipyramidaler Struktur / [Ph–C(NSiMe3)2]2FeCl; an Amidinato Complex of Iron(III) with a Distorted Trigonal-Bipyramidal Structure

The amidinato complex [Ph—C(NSiMe3)2]2FeCl has been prepared by the reaction of FeOCl with the amidine Ph—C(NSiMe3)[N(SiMe3)2] in acetonitrile/THF in the form of dark red moisture sensitive single crystals. The complex was characterized by IR spectroscopy, by its 57Fe-Mössbauer spectra, as well as by an X-ray structure determination. Space group PI, Z = 2, 3180 observed unique reflections, R = 0.068. Lattice dimensions at —80°C: a = 1210.4(2), b = 1272.7(3), c = 1316.0(3) pm; α = 67.81(3)°, β = 76.14(3)°, γ = 67.19(3)°. The complex has a molecular structure in which the iron atom is surrounded in a distorted trigonal-bipyramidal fashion with the chlorine ligand and two nitrogen atoms of different amidinato chelates in equatorial positions. The remaining nitrogen atoms occupy the apical positions.