Synthesis and Characterization of Soluble Phthalocyanines: Structure-Property Relationship

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Abstract
(μ-Oxo)bis[octakis(alkoxy)phthalocyaninatoiron (III)] 6a-c are obtained by treatment of the cyclotetramerisation product of 4,5-bis(alkoxy)-phthalonitriles in lithium pentanolate with iron(II) acetate. Compounds 6a-c are reduced to bisaxially coordinated octaalkoxyphthalocyaninatoiron(II) in the presence of ligands such as pyridine and t-butylisocyanide. Reaction of 6a with bidentate bridging ligands (e.g. pyrazine, 1,4-diisocyanobenzene) yields the bridged complexes 8a and 9a. The Mößbauer spectroscopic data are described and compared with the analogous unsubstituted phthalocyaninatoiron derivatives.