A novel 1D coordination ploymer [{Cd(hmbdc)2(2,2′-bipy)2}·H2O]n (hmbdc=5-hydroxybenzene-1,3-dioic acid) was synthesized by the hydrothermal reaction of hmbdc, CdSO4·8H2O and 2,2′-bipy. The structure was characterized by elemental analysis, IR and single crystal X-ray diffraction. The title coordination ploymer crystallized in monoclinic with space group P2/c, a=0.857 96(19) nm, b=1.113 8(3) nm, c=1.858 8(4) nm, β=104.259(9)°. The coordination polymer has an infinite chain structure and its luminescent property has also been studied. CCDC: 294519.
A novel pyrazolato-bridged di-palladium髤 complex, {[(phen)Pd(Me2Pz-H)]2(μ-Me2Pz)}(NO3)(BF4)2(MeCN)(Me2Pz-H=3,5-dimethyl pyrazole; μ-Me2Pz=3,5-dimethyl pyrazolate), was synthesized and characterized by the element analysis and single crystal X-ray diffraction. It crystallizes in the monoclinic space group P21/c with unit cell parameters: a=1.131 6(3) nm, b=1.858 5(4) nm, c=2.127 0(5) nm, β=90.037(4)°, and V=4.473 2(18) nm3, Z=4, R=0.043 3, wR=0.123 7. The X-ray crystal structure analysis revealed that two Pd髤 atoms were bridged by one pyrazolate, and the other two pyrazole molecules were coordinated to the two Pd髤 atoms, respectively. The Pd...Pd separation within the complex is 0.349 2(1)nm, indicating quite weak interaction. CCDC: 290065.
A Zn(II) coordination polymer [Zn(pht)(pzH)2]n (where pht2-=dianion of o-phthalic acid, pzH=pyrazole) has been synthesized and the structure was determined by X-ray diffraction. The complex crystallizes in the monoclinic space group P21/c, a=0.821 39(10) nm, b=1.662 2(2) nm, c=1.156 42(14) nm, β=100.349(2)°, V=1.553 2(3) nm3, Z=4. Both carboxylate groups of the phthalate dianion coordinated in a monodentate mode bridged two Zn(II) atoms forming the structure of 1-D chain. The pyrazole ligands play two different roles: one only coordinates the metal atom and the other joins the coordination polymer into a 2-D sheet via N-H...O and C-H...O hydrogen bonds besides the coordination property. A blue photoluminescence peak at 435 nm was observed in solid state at room temperature. CCDC: 227946.
The transition metal and alkaline earth metal tetranuclear complex Cu2Ca2L2(H2O)6·2H2O where H4L represents the Schiff base N-3-carboxylsalicylideneglycylglycine was prepared and its crystal structure was determined by the single-crystal X-ray diffraction method at room temperature. It crystallizes in the monoclinic system, space group C2/c. The lattice parameters are a=2.128 2(2) nm, b=1.231 73(14) nm, c=1.323 42(15) nm, β=93.619(2)°, Mr=939.81, Dc=1.803 Mg·m-3, F(000)=1 928, Z=4 with R1=0.046 6. Each copper atom is coordinated by two nitrogen atoms, one carboxylate oxygen atom and one phenolic oxygen atom, in a square-planner manner. And each calcium atom is coordinated by three water oxygen atoms, three carboxylate oxygen atoms and one phenolic oxygen atom in a distorted pentagonal bipyramid. Two pentagonal bipyramids are connected by two carboxyl groups. CCDC: 239969.
