Acta Cryst. (2005). E61, m2314-m2316  [ doi:10.1107/S1600536805032319 ]

mer-Tris(ethyldiphenylphosphine oxide)tris(isothiocyanato)iron(III)

Z. Olejnik, T. Lis, I. Ondrejkovicová, J. Malo and S. Galková

Abstract: The title compound, [Fe(NCS)₃(C₁₄H₁₅OP)₃], adopts a meridional coordination of the three NCS^- ligands and three OPEtPh₂ ligands. The Fe-N and Fe-O bond lengths fall in the range 1.982 (2)-2.045 (2) Å, and the bond angles around the Fe³⁺ centre deviate only slightly from an ideal octahedral geometry. The three OPEtPh₂ ligands have similar geometries to each other and adopt the same general conformation with differences in the relative orientations of the phenyl groups. The NCS^- ligands are almost linear and the Fe-N-C angles range from 170.78 (17) to 177.56 (17)°. In contrast, the Fe-O-P angles show a great variation with two angles close to 180° [166.29 (10) and 171.21 (10)°] and the angles corresponding to a disordered OPEtPh₂ ligand far from 180° [137.0 (10) and 137.9 (5)°]. Both the disorder and the variations in the angles around the N and O atoms seem to result from weak intermolecular C-HS interactions.

Online 19 October 2005

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