Coordination polymers of flexible tetracarboxylic acids with metal ions. II. Supramolecular assemblies of 5,5 '-methylene- and 5,5 '-(ethane-1,2-diyl)-bis(oxy)diisophthalic acid ligands with d-transition metals

This report evaluates the coordination patterns of the 5,5'-methylene-bis(oxy)diisophthalic acid and 5,5'-(ethane-1,2-diyl)-bis(oxy)diisophthalic acid ligands, bearing flexible spacers between the two isophthalic acid fragments, with a series of d-metal ions. Thirteen new binary and ternary (with additional bipyridyl components) hybrid organic-inorganic coordination-driven assemblies were investigated in detail by X-ray crystallography. In most cases they exhibit polymeric architectures of three-dimensional connectivity, the formation of which is facilitated by the conformational flexibility of the ligands.