Two-dimensional CuII and first PbII coordination polymers based on a flexible 1,4-cyclohexanedicarboxylate ligand displaying different conformations and coordination modes

The preparation and crystal structures of two new coordination polymers based on a flexible 1,4-cyclohexanedicarboxylic acid (H2chdc) ligand, including a 2-D grid-like network {[Cu(bpo)(chdc)(H2O)](H2O)0.5}n (1) with large porous cavities and a 2-D close-knit framework [Pb(chdc)(H2O)]n (2), representing the first PbII complex of H2chdc, are described. The differences between the conformation and coordination fashions of chdc in two cases may be due to the distinct nature of the metal centers.