Synthesis and coordination properties of nitro derivatives of 5,15-diphenyl-3,7,13,17-tetramethyl-2,8,12,18-tetraethylporphyrin

Abstract

Methods were developed for the synthesis of nitro derivatives of 5,15-diphenyl-3,7,13,17-tetramethyl-2,8,12,18-tetraethylporphyrin containing nitro groups at the meso positions of the porphyrin core and at the para positions of the phenyl substituents. The formation kinetics of the zinc, copper, and cobalt complexes of the resultant porphyrins in pyridine and in an acetic acid–benzene (7 : 3) mixed solvent was studied. It was found that the properties of the porphyrin ligands are determined both by the electronic effect of the nitro groups and by the effects of spatial distortion of the porphyrin core.