METAL AND ORGANOMETAL COMPLEXES OF OXY-AND THIOPHOSPHORUS ACIDS. PART II. REACTIONS OF O,O-ALKYLENE DITHIOPHOSPHORIC ACIDS WITH TITANIUM(IV) ISOPROPOXIDE

Abstract

Abstract Replacement reactions of titanium(IV) isopropoxide with O,O-alkylene dithiophosphoric acids proceed in 1:1 and 1:2 molar ratios in refluxing benzene to yield tri-and diisopropoxytitanium alkylene dithiophosphates, (n = 1 and 2; G = °CMe2CMe2[sbnd], [sbnd]CH2CMe2CH2[sbnd], [sbnd]CH2CEt2CH2[sbnd], and [sbnd]CHMeCHMe[sbnd]) as hydrolysable, orange solids or viscous liquids, soluble in common organic solvents and monomeric in nature. Further replacement of isopropoxy groups to give tris and tetrakis dithiophosphates does not occur. The isopropoxy groups in the mixed derivatives, however, can be replaced by tert-butoxy groups. All these compounds have been characterized by elemental analyses, molecular weight determinations and IR and NMR (1H, 13C and 31P) spectral data which are consistent with bidentate chelating behaviour of the dithiophosphate ligands.