The crystal of 2D cadmium polymer [Cd(bix)2Cl2]n [bix=1,4-bis(imidazole-1-ylmethyl)-benzene] was obtained in DMF.Its crystal belongs to monoclinic system,space group P21/n,with a=0.779 83(3) nm,b=1.282 74(6) nm,c=1.441 90(6) nm,β=105.642 0(10)°,V=1.388 94(10) nm3,Dc=1.578 g·cm-3,F(000)=668,Z=4,μ(Mo Kα)=1.013 mm-1,and R1 =0.023 8,wR2 =0.055 4.It possesses a two-dimensional grid-type structure,the Cd(Ⅱ) center is coordinated by four nitrogen atoms from four bix ligands and two Cl atoms to furnish a slightly distorted octahedral geometry.The fluorescence spectra in DMF of the complex and bix ligand were studied.
The crystal of binuclear zinc complex Zn2(dhaash)2(py)4 was obtained in DMF and pyridine, where H2dhaash is 2,4-dihydroxy-5-acetylacetophenone-N-salicylhydrazone. It has been characterized by IR, UV, element analysis and X-ray single crystal diffraction. The crystallographic data were as follows: monoclinic system, space group P21 / c, a=1.108 98(11) nm, b=1.640 84(16) nm, c=1.445 14(14) nm, β=108.617(2)°, Z=2, V=2.492 1(4) nm3, Dc=1.466 g·cm-3, Mr=1 099.74, μ=1.031 mm-1, F(000)=1 136 and the final R=0.044 8 and wR=0.105 8 for 4 143 observed reflections with I≥2σ(I), respectively. The X-ray crystal structure analysis revealed that, in the centrosymmetric binuclear complex molecule, two zinc髤 centers are linked by two oxygen atoms (O(3) and O(3A)), respectively. Zn(1)...Zn(1A) distance is 0.314 81(6) nm, O(3)...O(3A) distance is 0.270 4(2) nm. Every zinc髤 ion has an elongated octahedral coordination. For example, the two pyridine nitrogen atoms, one oxygen atom and one nitrogen atom from salicylhydrazone, one oxygen atom from 2,4-dihydroxy-5-acetylacetophenone in one dhaash2- ligand and one oxygen atom from 2,4-dihydroxy-5-acetylacetophenone in another dhaash2- ligand coordinated to zinc髤 ion, respectively. Two zinc髤 ions and all the 72 non-hydrogen atoms in the two dhaash2- ligands are in the same plane. CCDC: 261929.
