1. Syntheses and Structures of 1,2,3-Substituted Cyclopentadienyl Titanium(IV) Complexes
- Author
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Dae June Joe, Dong Mok Shin, and Bun Yeoul Lee
- Subjects
Biphenyl ,Tris ,chemistry.chemical_compound ,Cyclopentadiene ,chemistry ,Cyclopentadienyl complex ,Stereochemistry ,chemistry.chemical_element ,General Chemistry ,Medicinal chemistry ,Toluene ,Titanium - Abstract
Cyclopentadiene compounds, 2-[CR'R(OMe)]-1,3-Me 2 C 5 H 3 (R, R' = 2,2'-biphenyl, 2) and 2-[CR'R(OSiMe 3 )]-1,3-Me 2 C 5 H 3 (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(NMe 2 ) 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-Me 2 C 5 H 2 }TiCl 3 (R, R' = 2,2'-biphenyl, 6) and {2-[CR'R(OSiMe 3 )]-1,3-Me 2 C 5 H 2 }TiCl 3 (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 Me 3 SiCl were not successful. X-ray structures of 6, 7 and an intermediate complex {2-[Ph 2 C(OSiMe 3 )]-1,3-Me 2 C 5 H 2 }TiCl 2 (NMe 2 ) (10) were determined.
- Published
- 2005
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