Abstract
Composition and thermodynamic stability of complexes of 1-[5-(hydrazidomethylsulfinyl)pentyl]-3,5-dimethylisocyanurate with cobalt(ii), nickel(ii), and iron(iii) in H2O—DMSO medium (60 vol.% DMSO) was studied by spectrophotometry, potentiometric titration, and mathematical modeling (CPESSP program). The geometries of all studied structures were optimized by the MM2 molecular mechanics method to obtain the primary target data (estimates) on coordination pattern of 1-[5-(hydrazidomethylsulfinyl)pentyl]-3,5-dimethylisocyanurate in complexes with cobalt(ii), nickel(ii), and iron(iii). Cobalt(ii) and nickel(ii) formed the 1 : 1 complexes; while iron(iii) under experimental conditions excluding redox reactions gave the 1 : 1 and 1 : 2 complexes. All complexes contain ligands in neutral form.
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