Chemistry of Ti(O~iPr)Cl_3 with Chloride and Oxygen-Containing Ligands: The Roles of Alkoxide and Solvents in the Six-Coordinate Titanium Complexes

摘要

This bonding sequence is very useful for the prediction of the geometry for six-coordinate complexes of early transition metals with the following principle: The strongest ligand prefers a trans position to the weakest ligand, and the second strongest ligand favors a trans position to the second weakest ligand in the complex. Kinetically, the trans position to the isopropoxide is rather labile for substitution, and the lability of the trans ligand ensures the effectiveness of titanium alkoxides for subsequent reactions or as catalysts in many asymmetric organic syntheses.