Syntheses and Structures of 1,2,3-Substituted Cyclopentadienyl Titanium(IV) Complexes

Bulletin of the Korean chemical society

Bun Yeoul Lee¹  Dae June Joe¹  Dong Mok Shin¹ 

关键词: Cyclopentadienyl;    Titanium;    X-ray structure;   

DOI  :  

学科分类：化学（综合）

来源: Korean Chemical Society

【 摘 要 】

Cyclopentadiene compounds, 2-[CR`R(OMe)]-1,3-Me2C5H3 (R, R` = 2,2`-biphenyl, 2) and 2-[CR`R(OSiMe3)]- 1,3-Me2C5H3 (R, R` = 2,2`-biphenyl, 3; R = ph, R` = ph, 4; R = 2-naphthyl, R` = H, 5) are readily synthesized from 2-bromo-3-methoxy-1,3-dimethylcyclopentene (1). Reaction of the cyclopentadienes with Ti(NMe2)4 in toluene results in clean formation of the cyclopentadienyl tris(dimethylamido)titanium complexes, which are transformed to the trichloride complexes, 2-[CR`R(OMe)]-1,3-Me2C5H2}TiCl3 (R, R` = 2,2`-biphenyl, 6) and {2-[CR`R(OSiMe3)]-1,3-Me2C5H2}TiCl3 (R, R` = 2,2`-biphenyl, 7; R = ph, R` = ph, 8; R = 2-naphthyl, R` = H, 9). Attempts to form C1-bridged Cp/oxido complexes by elimination of MeCl or Me3SiCl were not successful. X-ray structures of 6, 7 and an intermediate complex {2-[Ph2C(OSiMe3)]-1,3-Me2C5H2}TiCl2(NMe2) (10) were determined.

【 授权许可】

Unknown