One 1D T4(0)A(0) water tape embedded in a 1D Cu(II) coordination polymer with 1,3-bis(4-pyridyl)propane

The reaction of Cu(OH)2 (in situ synthesized from CuCl2·2H2O and NaOH), bpp and H2ox gave rise to a novel Cu(II) coordination polymer under ultrasonic irradiation at ambient temperature, namely [Cu(bpp)(ox)(H2O)·5H2O]n (1) (bpp = 1,3-bis(4-pyridyl)propane, H2ox = oxalic acid). In the complex 1, Cu(II) cations are bridged by bpp ligands to form a one-dimensional (1D) infinite wave-like polymeric chain. The coordinated ox2− anions and water molecules interact with each other by six different hydrogen-bonding motifs and extend the 1D polymeric chain into a two-dimensional (2D) bilayer pattern. Of further interest, one 1D T4(0)A(0) water tape consisting of alternate cyclic water tetramers resides in the channel structure of 1.