205392-34-3Relevant academic research and scientific papers
Synthesis of new mixed ring zirconocenes and evidence of ring loss
Shafiq, Faisal A.,Richardson, David E.,Boncella, James M.
, p. 1 - 4 (1998)
The synthesis of the substituted silyl cyclopentadiene ligand [C5H5-Si(CH3)2(p-C6H 4Br)] (CpSiH) (1) is described. Deprotonation of (1) gives (CpSiLi) (2) which reacts with 1/2 ZrCl4 to produce the bent, sandwich complex Zr(CpSi)2Cl2 (3). Compound (3) can be alkylated to give Zr(CpSi)2(CH3)2 (4). Reaction of Cp*ZrCl3·(Et2O)1/2 with (2) in ether produces (3) and Zr(CpSi)(C5Me5)Cl2 (5) as the minor and major products, respectively, whereas reaction in toluene produces only 5. Et2O and THF are found to catalyze the observed ring loss during the synthesis of 5. Alkylation of 5 produces Zr(CpSi)(C5Me5)(CH3)2 (6).
