Syntheses of Co(II), Ni(II), Cu(II), Fe(III) and Cr(III) Complexes of Ortho-Substituted Benzenes: Model Complexes of Natural Organic Matter

This paper describes the syntheses of several model complexes for the metal complexes formed between aquatic or soil organic matter and metal ions. Based on functional group analyses of the natural organic matter, we chose ortho-substituted benzenes as chelating agents. They are salicylaldehyde, 2′-hydroxyaceto-phenone, methylsalicylate, and 2-methoxyphenol. A variety of cobalt(II), nickel(II), copper(II), iron(III), and chromium(III) complexes were prepared.