From five to infinity: The pentameric cluster-based supramolecular units {[Mn(L)]4[Nb6Cl12(CN)6]} (H2L=7-Me-salen) can be extended into two 1D coordination polymers through either the formation of manganese dimers or through ditopic ligands (see picture). In 1 the supramolecular units are linked through phenoxo bridges between the Mn complexes, while in 2 a trans-1,2-bis(4-pyridyl)ethylene ligand connects the pentameric assemblies.
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Zhang et al. (2007) studied this question.
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