Synthesis and Crystal Structures of Two Novel Copper(II) Coordination Polymers Constructed from Different Ligands

Two novel coordination polymers of [Cu(4-Pya)(2,4-PydcH)]n (1) and [Cu2(2,6-Ndc)2(Bpobp)]n (2) (4-Hpya= 4-pyridinecarboxylic acid, 2,4-pydcH2 =pyridine-2,4-dicarboxylic acid, 2,6-Ndc =2,6-naphthalenedicarboxylate, Bpobp=4,4′-bis(3-pyridoxy)-biphenyl)) have been hydrothermally prepared by the reaction of Cu(NO3)2·3H2O and mixed ligands, and characterized by single crystal X-ray diffraction. 1 crystallizes in the orthorhombic system, and the space group is Pna21, with the crystal cell parameters a=2.138 20(2) nm, b=0.990 60(1) nm, c=0.608 40(1) nm, V=1.288 65(3) nm3, Z=4, R1=0.023, wR2=0.067. 2 crystallizes in the triclinic system with space group P1, a=0.810 2(3) nm, b=0.997 9(4) nm, c=1.270 5(5) nm, α=86.282(6)°, β=73.517(5)°, γ=89.107(6)°, and V=0.982 9(7) nm3, Z=2, R1= 0.082, wR2=0.160 2. Complex 1 displays a three-dimensional framework, in which the five-coordinated Cu2+ shows distorted square pyramidal geometry. Complex 2 reveals a noninterpenetrating three-dimensional framework structure based on the dicopper paddle-wheel building units.