Coordination of pyridine and piperidine by cobalt complexes of water-soluble porphyrin and phthalocyanines

The extracoordination reactions of nitrogen-containing bases pyridine and piperidine with cobalt complexes of water-soluble porphyrin and phthalocyanines were studied. The stability constants of the axial complexes of cobalt porphyrins and cobalt phthalocyanines with pyridine and piperidine were determined.