PREPARATION OF NOVEL TITANIUM COMPLEXES BEARING O-PHOSPHINOPHENOL LIGANDS

The preparation of novel titanium complexes bearing o-phosphinophenol ligands is reported. The feature of this ligand system is that its ele ctronic and steric properties can be independently tuned. The complexe s were found to be fluxional by H-1 NMR analysis at low temperature. A n X-ray structural analysis showed that in the solid state the molecul e is chiral at the metal center. These complexes were shown to be effe ctive catalysts for olefin hydrogenation and imine hydrosilylation.