Synthesis and Characterization of Titanium(iv) Schiff Base Complexes. I. Titanium(iv) Complexes of Salicylaldehyde-2-Mercaptoanil

The synthesis of new Schiff base complexes of titanium(IV) of the type TiX2(SSP), where X =SSP/2, OEt, OPri, OBut, and (h5–C5H5)C1/2, and SSP is the dianion of the tridentate ONS donor ligand salicylaldehyde-2-mercaptoanil, is reported. Electronic, infrared, nmr, and mass spectral data indicate that the colorless ligand exists in the heterocyclic benzthiazoline form but rearranges to the chelating Schiff base from in the titanium complexes. The titanium(IV) atom is six-coordinate in the monomeric Ti(SSP)2 and dimeric Ti(OR)2 (SSP) (R =Et, Pr1) complexes and five-coordinate in the monomeric Ti(OBut)2 (SSP) and (h5-C5H5)TiCl(SSP) compounds.