Nikolaev Institute of Inorganic Chemistry

Functionalization of the cyclo-P5 ligand in pentaphosphaferrocene by main group nucleophiles

As the result of international collaboration the article of NIIC researchers Dr. Sc. Alexander V. Virovets and Dr. Eugenia V. Peresypkina is published in Angew. Chem. (IF 13.734).

The η⁵-P₅ cycle of pentaphosphaferrocene molecule was shown for the first time to be able to bind nucleophilic groups NH₂⁻, NMe₂⁻, PH₂⁻ and CH₂SiMe₃⁻ in mild conditions and to form therefore P-N, P-P and P-C chemical bonds, respectively. The resulting anionic complexes [{Cp^*Fe(η⁴-P₅)}₂N]₃⁻, [Cp^*Fe(η⁴-P₅NMe₂)]⁻, [Cp^*Fe(η⁴-P₅PH₂)]⁻ and [Cp^*Fe(η⁴-P₅CH₂SiMe₃)]⁻ were characterized by X-ray structural analysis and spectroscopy. The η⁴-P₅ cycle loses planarity and possesses the open-envelope geometry. The energetic profiles of the reactions clarify the formation of these products.

Functionalization of the cyclo-P₅ ligand in pentaphosphaferrocene by main group nucleophiles.