Alkali-Metal, Halide, and Lewis Base Free Monomeric Alkylsamarium(III) Porphyrinogen Complexes of High Stability

Alkylsamarium(III) complexes of a dimetalated modified porphyrinogen have been synthesized that have strong structural resemblance to samarocene(III) alkyl complexes. The monomeric complexes are free of alkali metals, halides, and coordinating solvent. The methyl and (trimethylsilyl)methyl complexes have been characterized by NMR spectroscopy, X-ray crystal structure determinations, and elemental analyses. Initial reactivity studies highlight the low reactivity of the complexes. © 2005 American Chemical Society.