Dynamic stereochemistry of ligand substitution in quasi-tetrahedral complexes of bis(η-cyclopentadienyl)titanium. Stereospecific reaction at titanium with retention of configuration, and X-ray structures of [(η5-C5H5)(η5-1-Me,3-Pri-C5H3)(2-ClC6H4O)ClTi] and [(η5-C5H5)(η5-1-Me, 3-Pri-C5H3)(2-ClC6H4O)(2,6-Me2C6H3O)Ti]

Abstract

Substitution of an OR group by a Cl ligand by the action of HCl on quasi-tetrahedral bis-cyclopentadienyltitanium complexes of the type [(cp)(cp′)Ti(OR¹)(OR²)] is a stereospecific process which occurs with retention of configuration at titanium; the X-ray crystal structures of chloro- and 2,6-dimethylphenoxy-(2-chlorophenyl)-(η⁵-cyclopentadienyl)-(η⁵-1-methyl-3-isopropylcyclopentadienyl)titanium are reported.