Synthesis, characterization and reactivity of rare-earth metal amide complexes supported by pyrrolyl-substituted cyclopentadienyl ligand

Amine elimination between Ln[N(SiHMe2)2]3(THF)x and 1 equiv. of C4H4NSiMe2C5Me4H afforded (C4H4NSiMe2C5Me4)Ln[N(SiHMe2)2]2 (Ln = Sc (1), Y (2)) and [C5Me4SiMe2N(SiHMe2)2]La[N(SiHMe2)2](C4H4N) (3). The ternary catalyst system of 1 or 2/AliBu3/[Ph3C][B(C6F5)4] showed activity towards syndio-specific polymerization of styrene.78