Synthesis and molecular structures of zirconium and hafnium complexes bearing dimethylsilandiyl-bis-2,4,6-trimethylindenyl and dimethylsilandiyl-bis-2-methyl-4,6-diisopropylindenyl ligands

Zirconium and hafnium ansa-complexes bearing 2,4,6-trialkyl-substituted indenyl fragments, rac- and meso-Me2Si(2-Me-4,6-R2C9H3-η5)2MCl2, where R = Me, i-Pr and M = Zr, Hf, were synthesized, separated, and unambiguously characterized by NMR pectroscopy and X-ray crystal structure analysis.