Coordination and electrochemistry of new substituted manganese phthalocyanines

A number of substituted manganese phthalocyanines PcMn have been synthesized from the corresponding phthalonitriles with rather good yields (up to 67%) and high purity. All complexes were characterized by elemental analysis, electronic absorption spectra, and some of them by redox potentials. Three coordination forms — PcMn(II), PcMn(III)X and [LPcMn(III)] 2 O were fixed for all complexes. The equilibrium of three electronic isomers — Pc +· Mn(I) × L, PcMn(II) × L n and Pc -· Mn(III) × 2L — has been observed in solutions of all PcMn(II) in the presence of organic base L.