Crystal structure of fluoro(2,3,7,8,12,13,17,18-octaethylporphyrinato)-oxoniobium; demonstration of the presence of six-co-ordinated niobium

Abstract

When HF is bubbled through a solution of [Nb₂L₂O₃](L = porphyrinate), porphyrinatoniobium oxide fluoride complexes are formed. The structures of some of these complexes have been studied from analytical and spectroscopic data. The title compound has been determined by X-ray diffraction methods. Crystals are monoclinic space group P2₁/c with a= 15.007(3), b= 22.257(4), c= l0.058(2)Å, β= 77.85(2)°, and Z= 4.