Macrocyclic Zinc(II) Coordination Polymers Constructed from Aromatic and Cyclohexane Dicarboxylate Ligands

Two zinc(II) complexes [Zn(L1)(bpdc)].0.75H2O (1) and [Zn(L1)(e,e-trans-1,4-chdc)].2H2O (2)were prepared and structurally characterized. The complex 1 which contains the macrocycle L1 and bridging bpdc ligands exhibits a 2D zinc(II) supramolecular coordination polymer in crystalline solid. One of the chains runs along the crystallographic c axis with pairing up to form a double stranded supramolecular polymer. The other chain along the crystallographic b direction runs over the 1D double stranded polymers in a slanted fashion, resulting in the formation of 2D sheets. The structure 2 exhibits a 1D coordination polymer with a basic [Zn(L1) (e,e-trans-1,4- chdc)] unit. The 1D coordination polymer chain is connected to each other by the mediation of lattice water molecules to form 2D sheet, but neither direct inter chain interactions nor interactions between the sheets are observed in [Zn(L1)(e,e-trans-1,4-chdc)]?2H2O.