Titanium(IV) Complexes of Bifunctional Tridentate or Tetradentate Schiff Bases

Abstract

Reactions of titanium isopropoxide with bifunctional tridentate Schiff bases, such as salicylidene-o-aminophenol, acetylacetone-o-aminophenol and benzoylacetone-o-aminophenol and bifunctional tetradentate Schiff bases, such as bis-acetylacetone ethylenediimine, bis-benzoylacetone ethylenediimine, bis-salicylaldehyde ethylenediamine and glyoxal-o-aminohpenol have been investigated in different stoichiometrc ratios. The resulting products Ti (OPri) 2 (SB), Ti (SB) 2, Ti (OPri) 2 (S′B′), Ti (OPri) 2 (S″B″) and Ti (OPri) (S″B″) (S″B″H) (where SBH2 = bifunctional tridentate Schiff base, S′B′H2 = bis-acetylacetone or bis-benzoylacetone ethylenediimine and S″B″H2 = bis-salicylaldehyde ethylenediamine or glyoxal-o-aminophenol) have been isolated in almost quantitative yields. The molecular weights of the products soluble in benzene have been determined ebullioscopically and plausible structure indicated. The thermogravimetric analysis of the salicylidine-o-aminophenol derivatives has also been carried out.