Other metal-nucleobase ID Extended Systems

FIGURE 17. (a) A fragment of the polymeric compound showing the coordination mode of the adeninato bridge, (b) Perspective view of the 3D framework along the 

A similar synthetic approach has been also employed to obtain a discrete hexameric (H20)2Cu2(p3-ade-KA KA KA )4[Cu(oda)(H20)]4 6H2O (oda = oxydiacetato) entity, in which the central dimeric core is bonded to four monomeric units. The 3D polymerization is precluded by the blocking tridentate oda ligands. 

FIGURE 20. Polymeric chain found in compound [HgCl2(l,9-Megu-KA )] 2HgCl2 . 

Lippert and co-workers synthesized a ID polymeric Hg(II)-nucleobase complex with a guanine derivative (l,9-DiMeG= 1,9-dimethylguanine) by the reaction of HgCl2 with the guanine ligand in a water-alcohol mixture (Fig. 20). The Hg(II) ion is coordinated to one guanine (via N7 position) and three 

Cl ligands. Two of these Cl act as bridging ligands. The polymeric structure is co-crystallized with HgCl2 molecules.  

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