Diaqua­bis(1,3-propane­diamine)nickel(II) squarate tetrahydrate

The asymmetric unit of the title compound, [Ni(C3H10N2)2(H2O)2](C4O4)·4H2O, contains one-half of the diaqua­bis(1,3-propane­diamine)nickel(II) cation, one-half of the centrosymmetric squarate anion and two uncoordinated water mol­ecules. In the cation, the NiII atom is located on a crystallographic inversion centre and has a slightly distorted octa­hedral coordination geometry. The six-membered chelate ring adopts a chair conformation. O—H⋯O hydrogen bonds link the cation and anion through the water mol­ecule, while N—H⋯O hydrogen bonds link the cation and anion and cation and water mol­ecules. In the crystal structure, inter­molecular O—H⋯O and N—H⋯O hydrogen bonds link the mol­ecules into a three-dimensional network structure

Hydrothermal synthesis and characterization of cobalt(II), nickel(II) and zinc(II) coordination polymers with 2,2 '-dimethylglutarate and 1,2-bis (4-pyridyl)ethane

The mixed-ligand coordination polymers containing 2,2'-dimethylglutarate (dmg) and 1,2-bis(4-pyridyl) ethane (dpetan) ligands, [Co(mu(3)-dmg)(mu-dpetan)](n) (1), [Ni-2(mu-dmg)(2) (H2O)(2) (mu-dpetan)(2)](7), (2) and [Zn(mu-dmg)(H2O)(mu-dpetan)(0.5)](n) (3), were synthesized through a hydrothermal method and characterized by single-crystal X-ray diffraction. Complexes 1 and 2 are a two-dimensional (2D) structures, in which Co (II) or Ni(II) ions were bridged by dmg and dpetan ligands. Complex 3 exhibits a one-dimensional (1D) ladder-like structure, which is further extended in 2D through hydrogen bonding interactions. dmg ligand exhibits three different coordination modes in 1-3 and the coordination mode in the complex 2 has been unprecedented up to now. The thermal properties of the complexes were investigated. Moreover, photoluminescence property of complex 3 was recorded in the solid state at the room temperature. (C) 2018 Elsevier Ltd. All rights reserved

Three dimensional manganese(II) coordination polymers constructed from 2,2-dimethylglutarate and bis(pyridyl) type ligands

Hydrothermal reactions of Mn(CH3COO)(2)center dot 4H(2)O and 2,2-dimethylglutaric acid (H(2)dmg) in the presence of pyridyl group ligands (4,4'-bipyridine (bipy) or 1,2-di(4-pyridyl)ethylene (dpeten)) are produced under the same conditional. Two new three dimensional coordination polymers, namely, [Mn-2(mu(4)-dmg)-(mu(4)-dmg)(mu-bipy)](n), (1), and [Mn-2(mu(4)-dmg)(mu(4)-dmg)(mu-dpeten)](n) (2), were characterized by IR spectroscopy, elemental analysis, single crystal and powder X-ray diffractions as well as thermal analysis techniques. The X-ray single crystal data exhibits that 1 displays 3D framework without interpenetrating, whereas 2 shows a 2-fold 3D -> 3D interpenetrating structure. The dmg anions coordinate to Mn(II) ions as a chelate and bis-bridging ligand to form 1D chain. The adjacent 1D chains are connected by bipy or dpeten ligands to generate 3D frameworks. Additionally, the dmg ligand exhibits two unprecedented coordination modes. (C) 2019 Elsevier Ltd. All rights reserved

Self-assembly of three new metal organic coordination networks based on 1,2-bis(imidazol-1yl-methyl)benzene

Three new metal organic coordination architectures from one-dimensional structures to three-dimensional frameworks, formulated as [Zn(mu-HCO2)(HCO2)(mu-o-bix)](n) (1), {[Cu(mu-o-bix)(2)(H2O)(2)]center dot 2HCO(2)}(n) (2) and {[Cd-2(mu(3)-siP)(2)(mu-o-bix)(2)Cd(mu-o-bix)(2)(H2O)(2)]center dot 5H(2)O) (3) (sip = 5-sulfoisophthalate), were synthesized using the flexible 1,2-bis(imidazole-1-ylmethyl)-benzene (o-bix) ligand in mixed-solvent media (solvothermal conditions) and characterized by single-crystal diffraction, Fr-IR and photoluminescence spectroscopy and thermogravimetric/differential thermal analysis. The X-ray crystallographic studies of 1 and 2 reveal 2D layer structures involving formate ions, which are generated in situ from the hydrolysis of DMF. Topological analysis results of the complexes show that 1 displays a honeycomb-like 6(3) layer and 2 has a hydrogen-bonded 2D structure with a 4-connected (4(4).6(2)) square lattice topology. Compound 3 exhibits a 3D 4,6-connected tcj/hc (4(2).5(2).6(2))(4(2).5(6).6(4).7(3)} net. In addition, the photoluminescence spectra of 1 and 3 show blue fluorescent emission bands; these emissions can probably be assigned to intraligand fluorescent emissions. (C) 2015 Elsevier Ltd. All rights reserved.Scientific and Technological Research Council of Turkey (TUBITAK)Turkiye Bilimsel ve Teknolojik Arastirma Kurumu (TUBITAK) [109T201]This work has been supported by the Scientific and Technological Research Council of Turkey (TUBITAK, Project No: 109T201).WOS:0003677571000012-s2.0-8494205892

Cd(II)-coordination polymers with isophthalic acid bearing a hydroxyphenylazo group and substituted bis(imidazole) linkers

Four Cd(II) coordination polymers, formulated as {(H(2)betib)(2)[Cd(mu-Hpdia)(2)]center dot H2O center dot MeOH center dot dmf}, (1), {[Cd(mu-Hpdia)(mu-dipib)]center dot dmf}(n) (2), [Cd(mu-Hpdia)(H2O)(2)(mu-betix)(0.5)](n) (3) and [Cd(mu(3)-Hpdia)(MeOH) (mu-bipix)(0.5)](n) (4) (Hpdia: 5-(4-hydroxyphenylazo)isophthalate, betib or bipib: 1,4-bis(2-x-imidazol-1-yl)butane, betix or bipix: 1,4-bis((2-x-imidazol-1-yl)methyl)benzene where x = ethyl- or isopropyl-) were synthesized under the same solvothermal conditions with 5-(4-hydroxyphenylazo)isophthalic acid and flexible or semi-flexible substituted bis(imidazole) linkers, and characterized by elemental analysis, IR spectroscopy, single crystal X-ray diffraction and thermal analysis methods. X-ray analysis results demonstrated that compounds 1-4 displayed 1D, 2D and 3D structures. In 1, the flexible betib ligand was protonated and the 2D structure formed by Hpdia was extended by hydrogen bonding to a 3D supramolecular network with the rtw topology. The hydrogen-bonded structure of 2 displayed a two-fold 3D -> 3D interpenetrated supramolecular network with the tcj/hc topology. Compounds 3 and 4, synthesized using semi-flexible bis(imidazol) ligands, exhibited 1D and 3D frameworks, respectively. The thermal, optical and photoluminescence properties of the compounds were also investigated. (C) 2020 Elsevier Ltd. All rights reserved.Scientific Research Fund of Eskisehir Osmangazi UniversityEskisehir Osmangazi University [201819D20]This work was supported by the Scientific Research Fund of Eskisehir Osmangazi University (Project No. 201819D20).WOS:0005282670000092-s2.0-8508169777