First X-ray crystal structure of a lanthanide(iii) monoporphyrinic complex using non-planar porphyrin rings

Abstract

Twenty-three years after the first synthesis of lanthanide(III) porphyrins the X-ray crystal structure of [Tb ^III (β-Cl ₈ tpp)(O ₂ CMe)(Me ₂ SO ₂ ] is reported; the synthetic route to four halogenated porphyrins H ₂ (β-X _n tpp) (X = Cl or Br, n = 4 or 8) is described and compared with the corresponding [Tb ^III (β-X _n tpp)(O ₂ CMe)]; the highly distorted structure of the Tb ^III complex is compared with similar perhalogenated porphyrinic complexes; the X-ray structure of the brominated free base is also reported.