Abstract
A family of group 4 alkoxide and aryloxide complexes of a chiral cyclopentadienyl-derived (hydro)permethylpentalenyl ligand (C8Me6H; Pn*(H)) have been prepared and fully characterized. Both racemic and enantiopure complexes of all group 4 congeners were prepared with a wide variety of alkoxide and aryloxide ligands. The complexes Pn*(H)Ti(OtBu)3 (1), Pn*(H)Ti(O-2,6-Me-C6H3)3 (2), Pn*(H)Zr(OtBu)3 (3), Pn*(H)Zr(OCH2Ph)3 (4), Pn*(H)Zr(S-OCH{CH3}C6H5)3 (5), Pn*(H)Zr(rac-OCH{CH3}C6H5)3 (6), Pn*(H)Zr(O-2,6-Me-C6H3)3 (7), Pn*(H)Zr(O-2,6-iPr-C6H3)3 (8), Pn*(H)ZrCl2(O-2,6-tBu-C6H3) (9), Pn*(H)Hf(O-2,6-Me-C6H3)3 (10), Pn*(H)HfCl(O-2,6-iPr-C6H3)2, (11), and Pn*(H)HfCl2(O-2,6-tBu-C6H3) (12) were prepared by the reaction of Pn*(H)MCl3 complexes with the corresponding potassium alkoxides and aryloxides. Single-crystal X-ray diffraction studies implied that, despite multiple diastereomers being possible for each complex, the diastereomers isolated are limited to configurations in which the methyl group at the chiral cen...
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