Synthesis of new mixed ring zirconocenes and evidence of ring loss

FA Shafiq, DE Richardson, JM Boncella

Index: Shafiq, Faisal A.; Richardson, David E.; Boncella, James M. Journal of Organometallic Chemistry, 1998 , vol. 555, # 1 p. 1 - 4

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Citation Number: 7

Abstract

The synthesis of the substituted silyl cyclopentadiene ligand [C5H5–Si (CH3) 2 (p- C6H4Br)](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, ...