Mild template synthesis in the ternary system Co(II)-dithiooxamide-acetone in gelatin-immobilized Co2[Fe(CN)6] matrix implantates

Complexation processes occurring on contact of gelatin-immobilized cobalt(II) hexacyanoferrate(II) Co-2[Fe(CN)(6)] with alkaline (pH > 10) aqueous solutions containing dithiooxamide and acetone were studied. A template synthesis occurs in the system. Its product is a polycyclic cobalt(III) chelate [CoX(H2O)-(OH)] (H2X is 4,6,6-trimethyl-1,9-diimino-1,9-disulfanyl-3,7-diazanon-3-ene-2,8-dithione) in which dithiooxamide and acetone act as ligand synthons. The reaction scheme is suggested. This ligand is not formed from dithiooxamide and acetone in solution in the absence of Co(II).