Synthesis and physicochemical properties of girded porphyrins

-Alkyl-substituted 5,15-diphenylporphyrins are synthesized, whose phenyl rings are connected through the ortho positions by bridging groups of various length. The resulting porphyrins were characterized by the electronic absorption and ¹H NMR spectra, and their structure was calculated by the molecular mechanics method. The kinetics of complex formation of the synthesized porphyrins with copper(II) acetate in acetic acid and pyridine depend on the degree of shielding of the reaction center in the tetrapyrrole ligand and its planarity.Translated from Zhurnal Obshchei Khimii, Vol. 74, No. 10, 2004, pp. 1733–1738.Original Russian Text Copyright © 2004 by Kuvshinova, Pukhovskaya, Semeikin, Golubchikov.This revised version was published online in April 2005 with a corrected cover date.