Synthetic procedures and structural features of new di- and tri-nuclear chelate compounds of Cd(II) with sulfur and nitrogen donor ligands
摘要:
Cd(dmpymt)(2) reacts with CdCl2, CdBr2 center dot 4H(2)O, Cdl(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. (C) 2009 Elsevier Ltd. All rights reserved.