New homoleptic rare-earth metal tris-aryl complexes, useful as reagent or catalyst for organic reactions and for ring-opening polymerization for preparing polyesters and pre-catalyst for the polymerization of olefins conjugated olefins

摘要

Homoleptic rare-earth metal tris-aryl complexes (I) are new. Homoleptic rare-earth metal tris-aryl complexes of formula (I) are new. RE : Sc, Y, La, Ce, Pr, Nd, Pm, Sm, Eu, Gd, Tb, Dy, Ho, Er, Tm, Yb or Lu; X : O or CRR1a; R1, R2 : phenyl; R, R1a : H or alkyl; and n : 1-10C phenyl or trimethylsilyl. [Image].