Anorganische Chemie - Beckhaus

Tetrabenzo[a,c,g,i]fluorenyllithium and η5-Tetrabenzo[a,c,g,i]fluorenyltitanium Complexes

K. Schröder, D. Haase, W. Saak, A. Lützen, R. Beckhaus
Organometallics
, 2006, 25(16), 3824 - 3836.

Deprotonation of tetrabenzo[a,c,g,i]fluorene (Tbf-H) with n-buthyllithium leads to ionic Tbf-Li consisting of well-separated cations and anions. Subsequent reaction with chlorotitanium Compounds leads to sterically demanding half-sandwich complexes, used for the syndiotactic polymerization of styrene.