Tris(trimethylsilyl)Silyl Derivatives of Tri-tert-butoxyzirconium and Tri-tert-butoxyhafnium. X-ray Crystal Structure of (Me3CO)3ZrSi(SiMe)3

摘要

By reaction of (Me3CO)3MCl(M=Zr or Hf) with (THF)3LiSi(SiMe3)3, the new silyl complexes(Me3CO)3MSi(SiMe3)3(1, M=Zr, 2, M=Hf) have been prepared and characterized. These colorless complexes represent the first group 4 metal silyl derivatives that do not contain ancillary cyclopentadienyl ligands. Crystals of 1 are orthorhombic, Pnma, a=21.48 (1), b = 16.850 (8), c = 10.033 (5) A, V = 3631 (3) Cu. A, Z=4, RF=6.00%. Compound 1 contains the shortest Zr-Si bond yet reported, 2.753 (4) A. Preliminary reactivity studies with 1 and 2 are described. Keywords: Metal complexes; Zirconium compounds; Hafnium compounds; Lithium compounds; Silicon compounds; Carbonyl complexes; Reprints. (aw)