Redox reactions in the formation of titanium complexes with aromatic Schiff's bases

Abstract

Reaction of TiCl₃,3thf (thf = tetrahydrofuran) with potentially quadridentate Schiff's bases gives the complexes trichloro[NN′-ethylenebis(salicylideneimine)]tetrahydrofurantitanium(III), (I), dichloro[NN′-ethylenebis(salicylideneiminato)]titanium(IV), (II), dichloro[NN′-o-phenylenebis(salicylideneiminato)]titanium(IV), (III), and trichloro[NN′-(o-hydroxybenzylamino-o-phenylene)salicylideneiminato]tetrahydrofurantitanium(IV), (IV). Hydrogenation of one of the CN bonds of the Schiff's base occurs in formation of complex (IV).