Interaction of chelates with macrocyclic ligands. Porphyrins and Hg(II) chelate salts

The complex formation of different porphyrins (5,10,15,20-tetraphenylporphine (I), N-methyl-5,10,15,20-tetraphenylporphine (II), 2,3,7,8,12,13,17,18-octaphenyltetraazaporphyrin (III), and tert-butylphthalocyanine (IV)) with mercury(II) valinate (Hg(Val)₂) in DMSO was studied. The rates of reactions of macrocycles I, II, and IV with mercury(II) valinate were found to be higher than those with valinates of other d metals, and the complex formation rates of III with Hg(Val)₂ were comparable with these characteristics for other valinates. Mechanisms for binding of different porphyrins by Hg(II) chelate salts were proposed.Translated from Koordinatsionnaya Khimiya, Vol. 31, No. 2, 2005, pp. 93–97. Original Russian Text Copyright © 2005 by Mamardashvili, Berezin.