Synthetic procedures and structural features of new di- and tri-nuclear chelate compounds of Cd(II) with sulfur and nitrogen donor ligands

Abstract Cd(dmpymt) 2 reacts with CdCl 2 , CdBr 2 ·4H 2 O, CdI 2 , 2,2′-bipyridine and 1,10-phenanthroline to give the dimeric chelates [Cd(dmpymt)(bpy)Cl] 2 and [Cd(dmpymt)(phen)Cl] 2 , as well as the tri-nuclear complexes [Cd 3 (dmpymt) 4 (bpy) 2 Br 2 ] and [Cd 3 (dmpymt) 4 (bpy) 2 I 2 ] (dmpymtH = 4,6-dimethylpyrimidine-2-thione; bpy = 2,2′-bipyridine; phen = 1,10-phenantroline). In all complexes the Cd(II) centers present the coordination number six. The new compounds are examples of the managing of the final aggregation state of thiolate metal complexes by introducing co-ligands to block specific coordination sites of the metal center.