Ansa-Metallocene derivatives : XXIII . Aryl-substituted titanocene and zirconocene complexes with interannular tetramethylethano- or dimethylsilano-bridges. Crystal structures of representative examples

Abstract

Titanocene and zirconocene complexes with a phenyl or 1-naphthyl substituent in one β-position of each C 5-ring ligand and with an interannular tetramethylethano- or dimethylsilano-bridge have been prepared. Racemic complex isomers, which are formed together with varying amounts of their meso isomers, were separated from the latter and characterised by 1H NMR spectroscopy and X-ray crystallographic studies.