Dithiooxamide metal complexes

In addition to stabilizing organic products by reaction with metal-exchanged clays, as indicated above, aluminosilicate minerals may enable the preparation of metal organic complexes that cannot be formed in solution. Thus a complex of Cu(II) with rubeanic acid (dithiooxamide) could be prepared by soaking Cu montmorillonite in an acetone solution of rubeanic acid (93). The intercalated complex was monomeric, aligned with Its molecular plane parallel to the interlamellar surfaces, and had a metal ligand ratio of 1 2 despite the tetradentate nature of the rubeanic acid. 

Method 1. Polymerization of Bis(thiooxamides) with Metal Salts Dithiooxamide, or rubeanic acid as it is commonly referred to in the literature, has been widely used for the quantitative analysis of metals. In particular, copper, nickel, and cobalt form complexes that can be analyzed gravimetrically... 

---