SYNTHESIS, CHARACTERIZATION AND POLYMERIZATION POTENTIAL OF UNBRIDGEDAND BRIDGED HALF-SANDWICH COMPLEXES OF ZIRCONIUM CONTAINING N-DONOR LIGANDS

The synthesis of unbridged half-sandwich complexes of the type (C5H5)Z r[N(SiMe3)CH2CH2R]Cl-2 (R = OMe, NMe2) and bridged half-sandwich compl exes of the type (Cp-#-SiMe2-NCH2CH2R)ZrCl2 (Cp-# = C5H4, C9H6, C13H8) including intramolecular N-donor ligands is described. The complexes were characterized by H-1-, C-13-, and Si-29-NMR spectroscopy. The com plexes (C5H5)Zr[N(SiMe3)CH2CH2NMe2]Cl-2 (2) and (C5H4-SiMe2-NCH2CH2NMe 2)ZrCl2 (4) were further characterized by X-ray crystal structure dete rminations. In the solid state the nitrogen atom of the dimethylamino group is coordinated to the zirconium atom. (C) 1998 Elsevier Science S.A. All rights reserved.