Construction of two Cd(II) complexes by flexible adipic acid plus 2-((benzoimidazol-yl)methyl)-1H-tetrazole ligand

Crystal structure of catena-poly[(μ2-1-((benzotriazol-1-yl)methyl)-1H-1,3-imdazole-κ2 N:N′)-(1-((benzotriazol-1-yl)methyl)-1H-1,3-imdazole-κ1N)-(methanol-κ1 O)mercury(II)] dinitrate, C21H22N12O7Hg

C21H22N12O7Hg, monoclinic, P2/n (no. 13), a = 13.655(3) Å, b = 8.7038(17) Å, c = 23.260(5) Å, β = 102.51(3)°, V = 2698.8(10) Å3, Z = 4, R gt(F) = 0.0446, wR ref(F 2) = 0.0875, T = 293(2) K.

Effect of pH on the construction of CdII coordination polymers involving the 1,1'-[1,4-phenylenebis(methylene)]bis(3,5-dicarboxylatopyridinium) ligand

Changing the pH value of a reaction system can result in polymers with very different compositions and architectures. Two new coordination polymers based on 1,1'-[1,4-phenylenebis(methylene)]bis(3,5-dicarboxylatopyridinium) (L^2-), namely catena-poly[[[tetraaquacadmium(II)]-μ₂-1,1'-[1,4-phenylenebis(methylene)]bis(3,5-dicarboxylatopyridinium)] 1.66-hydrate], {[Cd(C₂₂H₁₄N₂O₈)(H₂O)₄]·1.66H₂O}_n, (I), and poly[{μ₆-1,1'-[1,4-phenylenebis(methylene)]bis(3,5-dicarboxylatopyridinium)}cadmium(II)], [Cd(C₂₂H₁₄N₂O₈)]_n, (II), have been prepared in the presence of NaOH or HNO₃ and structurally characterized by single-crystal X-ray diffraction. In polymer (I), each Cd^II ion is coordinated by two halves of independent L^2- ligands, forming a one-dimensional chain structure. In the crystal, these chains are further connected through O-H...O hydrogen bonds, leading to a three-dimensional hydrogen-bonded network. In polymer (II), each hexadentate L^2- ligand coordinates to six Cd^II ions, resulting in a three-dimensional network structure, in which all of the Cd^II ions and L^2- ligands are equivalent, respectively. The IR spectra, thermogravimetric analyses and fluorescence properties of both reported compounds were investigated.

Crystal structure of bis(acetato-κO)bis{2-((1H-tetrazol-1-yl)methyl)-1H-benzo[d]imidazole-κN}zinc(II), C22H22N12O4Zn

C22H22N12O4Zn, monoclinic, P21/c (no. 14), a = 9.864(2) Å, b = 8.6657(17) Å, c = 30.803(8) Å, β = 106.67(3)°, V = 2522.3(10) Å3, Z = 4, R gt(F) = 0.0630, wR ref(F 2) = 0.1625, T = 293(2) K.

A new one-dimensional CuII complex with a three-dimensional supramolecular architecture incorporating benzene-1,3-dicarboxylate and 1-[(1H-benzotriazol-1-yl)methyl]-1H-imidazole

Subtle modifications of N-donor ligands can result in complexes with very different compositions and architectures. In the complex catena-poly[[bis{1-[(1H-benzotriazol-1-yl)methyl]-1H-imidazole-κN³}copper(II)]-μ-benzene-1,3-dicarboxylato-κ³O¹,O^1':O³], {[Cu(C₈H₄O₄)(C₁₀H₉N₅)₂(H₂O)]·2H₂O}_n, each Cu^II ion is six-coordinated by two N atoms from two crystallographically independent 1-[(1H-benzotriazol-1-yl)methyl]-1H-imidazole (bmi) ligands, by three O atoms from two symmetry-related benzene-1,3-dicarboxylate (bdic^2-) ligands and by one water molecule, leading to a distorted CuN₂O₄ octahedral coordination environment. The Cu^II ions are connected by bridging bdic^2- anions to generate a one-dimensional chain. The bmi ligands coordinate to the Cu^II ions in monodentate modes and are pendant on opposite sides of the main chain. In the crystal, the chains are linked by O-H...O and O-H...N hydrogen bonds, as well as by π-π interactions, into a three-dimensional network. A thermogravimetric analysis was carried out and the fluorescence behaviour of the complex was also investigated.

A one-dimensional zinc(II) coordination polymer with a three-dimensional supramolecular architecture incorporating 1-[(1H-benzimidazol-2-yl)methyl]-1H-tetrazole and adipate

The synthesis of coordination polymers or metal-organic frameworks (MOFs) has attracted considerable interest owing to the interesting structures and potential applications of these compounds. It is still a challenge to predict the exact structures and compositions of the final products. A new one-dimensional coordination polymer, catena-poly[[[bis{1-[(1H-benzimidazol-2-yl)methyl]-1H-tetrazole-κN³}zinc(II)]-μ-hexane-1,6-dicarboxylato-κ⁴O¹,O^1':O⁶,O^6'] monohydrate], {[Zn(C₆H₈O₄)(C₉H₈N₆)₂]·H₂O}_n, has been synthesized by the reaction of Zn(Ac)₂ (Ac is acetate) with 1-[(1H-benzimidazol-2-yl)methyl]-1H-tetrazole (bimt) and adipic acid (H₂adi) at room temperature. In the polymer, each Zn^II ion exhibits an irregular octahedral ZnN₂O₄ coordination geometry and is coordinated by two N atoms from two symmetry-related bimt ligands and four O atoms from two symmetry-related dianionic adipate ligands. Zn^II ions are connected by adipate ligands into a one-dimensional chain which runs parallel to the c axis. The bimt ligands coordinate to the Zn^II ions in a monodentate mode on both sides of the main chain. In the crystal, the one-dimensional chains are further connected through N-H...O hydrogen bonds, leading to a three-dimensional supramolecular architecture. In addition, the title polymer exhibits fluorescence, with emissions at 334 and 350 nm in the solid state at room temperature.