Axially substituted titanium(IV) phthalocyanines

An easy synthesis of phthalocyaninatotitanium(IV) compounds substituted with bidentate ligands in the axial position is described. Using strongly chelating oxygen or sulfur donor ligands, the reaction of PcTiO with chelating agents leads to the formation of PcTiX complexes with X ≡ oxalate () (2a), catecholate () (2b), dithiocatecholate () (2j), 2,3-dihydroxynaphthalene () (2i) and other functionalized catechols (2c–2h). The new compounds possess an enhanced solubility in comparison to PcTiO. Copyright © 2000 John Wiley & Sons, Ltd.