Rare-earth metal bis(aminobenzyl) complexes supported by pyrrolyl-functionalized arylamide ligands: synthesis, characterization and styrene polymerization performance

Abstract

Acid–base reaction between Ln(CH₂C₆H₄NMe₂-o)₃ and 2,5-Me₂C₄H₂NCH₂SiMe₂NHC₆H₄R (R = H, (HL1); R = Cl-p, (HL2) in 1 : 1 molar ratio gave L₁Ln(CH₂C₆H₄NMe₂-o)₂ (Ln = Sc (1), La (2), Lu (3) and L₂Ln(CH₂C₆H₄NMe₂-o)₂ (Ln = Sc (4), La (5), Lu (6). The catalyst systems of 2 or 5/[Ph₃C][B(C₆F₅)₄] were active for syndio-specific styrene polymerization.