Oligonuclear Complexes as Nodes

Coordination polymers can be constructed from oligonuclear nodes as well. The metal ions interact with the divergent ligand through their easily accessible coordination sites. The presence of two or more metal ions (identical or different) confers a higher geometrical flexibility to the node. Moreover, the metal-metal intranode and internode interactions can lead to new redox. 

FIGURE 2. (a) Connection of the square-grid layers through SiFs ions in [Zn(4,4 -bipy)2]SiF6 (b) Packing diagram showing the formation of channels. 

FIGURE 3. Perspective view of a ladder-like coordination polymer, [Cu3(na)4(dca)2 (H20)s] 2H2O, constructed from two different bridging ligands (nicotinato and 

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