Bridging bgands

Triazine acts as a bridging bgand between Ru2(02CPh)4 molecules to give a 2-dimensional coordination polymer. Surest how triazine coordinates to Ru2(02CPh)4, and predict the structure of the repeat motif that appears in one layer of the structure of the crystalline product. 

An example of this type of dendrimer is the polynuclear species that can be prepared from 2,3-bis(2-pyridyl)pyrazine as bridging ligands, bipyridines as terminal bgands, and either Ru(II) or Os(II) as the metal centre. 

FIGURE 14.20 Structures of titanium complexes 95-100 with dithioalkanediyl-bridged bis(phenolate) bgands. 

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