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

Abstract

The complex formation of different porphyrins (5,10,15,10,15,2,3,7,8,12,13,17,, and tertbutylphthalocyanine ( 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.Kinetic parameters of coordination of porphyrins I -III with Hg(II) chelate salts in DMSO ( c por = 1 × 10 -5 mol/l) Porphyrin c salt × 10 4 , mol/l ( T = 298 K) ( T = 288 K)