Novel Self-Assembled Chain of Water Molecules in a Metal-Organic Framework Structure of Co(II) with Tartrate Acid

1-D water chains constructed by dimer water clusters and edge-sharing cyclic pentamer have been observed in the compound [Co(C₄H₄O₆)(2,2‘-bipy)·5H₂O] (<b>1</b>), in which the water chains join the 1-D coordination polymeric chains to a 3-D network through hydrogen-bond interactions.