New aspects of the chemistry of transition metal phthalocyanines

Abstract

Electron variability and complex formation of transttton metal phthalocyanine are discussed. Under proper conditions the well-known metal(n) phthalocyanines [MPc J (M = Cr, Mn, Fe, Co, Ni, Cu, Zn) can take up four or, in two cases, five electrons. To elucidate the electronic structure of the isolated anionic complexes Li [MPcl.m THF a simple LCAO-MO modelwas dcrived which proved weil sui’ted to ihe interpretation of the chemical constitution of the various transition metal phthalocyanines. Properties like the oxidation potential, different multiplicities between isoelectronic species (e.g. manganese and iron phthalocyanines) and the Mössbauer spectra of iron phthalocyanines are explained. Further, preparation and properties of metal(m) phthalocyanines, complex formation of metal(n) phthalocyanines with pyridine and tetrahydrofuran and of iron(n) phthalocyanine with amines and various n-acid ligands, and the formation of a-organyl transition metal phthalocyanines are treated. © 1974, Walter de Gruyter. All rights reserved.