New reaction of β-diketiminatoeuropium complex: sterically induced oxidation–coupling of β-diketiminato ligands

Abstract

Attempted synthesis of sterically demanding tris-β-diketiminate complexes of europium led to oxidation–coupling of β-diketiminates and the formation of the THF-solvated divalent europium complex Eu(L^2,6-Me₂)₂(THF) (L^2,6-Me₂ = [{N(2,6-Me₂C₆H₃)C(Me)}₂CH]⁻), while the normal tris-β-diketiminate complex Eu(L^2-Me)₃ for the less bulky ligand L^2-Me ([{N(2-MeC₆H₄)C(Me)}₂CH]⁻) was isolated by the same procedure.