Poly[[chlorido-(1,10-phenanthroline-κ2N,N′)copper(II)]-μ3-1,1,3,3-tetra-cyano-2-eth-oxy-propenido- κ3N:N′:N′′] : coordination polymer sheets linked into bilayers by hydrogen bonds

The authors acknowledge the Algerian DG–RSDT (Direction Generale de la Recherche Scientifique et du Developpement Technologique) and the Algerian ATRST (Agence Thematique de Recherche en Sciences et Technologie; PNR project) for financial support. ZS thanks Sandra Lebaroud for her help in preparing the manuscript and the Unit of Support for Technical and Scientific Research (UATRS, CNRST) for the X-ray measurements.In the title compound, [Cu(C9H5N4O)Cl(C12H8N2)] n or [Cu(tcnoet)Cl(phen)] n , where phen is 1,10-phenanthroline and tcnoet is 1,1,3,3-tetra-cyano-2-eth- oxy-propenide, the axially elongated (4 + 2) coordination polyhedron around the CuII centre contains N atoms from three different tcnoet ligands. The resulting coordination polymer takes the form of sheets which are linked in pairs by a single C - H⋯N hydrogen bond to form bilayers. The bond lengths provide evidence for significant bond fixation in the phen ligand and extensive electronic delocalization in the tcnoet ligand, where the two -C(CN)2 units are rotated, in conrotatory fashion, out of the plane of the central C3O fragment.Publisher PDFPeer reviewe

Coordination polymer chains built from CuII and adipate ions linked by hydrogen bonds to form a three-dimensional framework structure

In the title compound, catena-poly[bis[(2,2'-bipyridine-κ2N,N')(1,1,3,3-tetracyano-2-ethoxypropenido-κN)copper(II)]-μ4- hexanedioato-κ6O1,O1:O1 :O6,O6':O6], [Cu2(C9H5N4O)2(C6H8O4)(C10H8N2)2]n , the adipate (hexanedioate) dianion lies across a centre of inversion in the space group P. The CuII centre adopts a distorted form of axially elongated (4+2) coordination, and the CuII and adipate components form a one-dimensional coordination polymer from which the 2,2'-bipyridine and 1,1,3,3-tetracyano-2-ethoxypropenide components are pendent, and where each adipate dianion is bonded to four different CuII centres. The coordination polymer chains are linked into a three-dimensional framework structure by a combination of C-H⋯N and C-H⋯O hydrogen bonds, augmented by a π-π stacking interaction.Publisher PDFPeer reviewe

Tris(2-hydroxyanilinium) hexachlorostannate(IV) chloride trihydrate

In the title compound, (C6H8NO)(3)[SnCl6]Cl center dot 3H(2)O, the asymmetric unit contains three independent cations of protonated o-aminophenol, one hexachlorostannate(IV) and one chloride anion, and three molecules of water. The crystal structure can be described as double layers of [SnCl6] octahedra and 2-hydroxyanilinium cations parallel to the ( 10 (1) over bar) plane, with the chloride ions and the water molecules sandwiched between the double layers. A myriad of hydrogen bonds, namely, cation-cation, cation-anion, cation-water and water-water, result in a complex network of intermolecular bonds reinforcing the cohesion of the ionic structure

Coordination polymer chains built from Cu^II and adipate ions linked by hydrogen bonds to form a three-dimensional framework structure

In the title compound, catena-poly[bis[(2,2'-bipyridine-κ2N,N')(1,1,3,3-tetracyano-2-ethoxypropenido-κN)copper(II)]-μ4- hexanedioato-κ6O1,O1:O1 :O6,O6':O6], [Cu2(C9H5N4O)2(C6H8O4)(C10H8N2)2]n , the adipate (hexanedioate) dianion lies across a centre of inversion in the space group P. The CuII centre adopts a distorted form of axially elongated (4+2) coordination, and the CuII and adipate components form a one-dimensional coordination polymer from which the 2,2'-bipyridine and 1,1,3,3-tetracyano-2-ethoxypropenide components are pendent, and where each adipate dianion is bonded to four different CuII centres. The coordination polymer chains are linked into a three-dimensional framework structure by a combination of C-H⋯N and C-H⋯O hydrogen bonds, augmented by a π-π stacking interaction.</p

Hydrothermal synthesis of six new lanthanides coordination polymers based on 1-H-benzimidazole-5-carboxylic acid: Structure, Hirshfeld analysis, thermal and spectroscopic properties

Six novel lanthanide metal coordination polymers (LnCPs) [Ln(Hbic)3(H2O)]n [Ln = La (1), Pr (2), Nd (3), Sm (4), Eu (5), Gd (6)] have been synthesized by reaction of 1H-benzimidazole-5-carboxylic acid (H2bic) with Ln2O3 under hydrothermal conditions, and characterized via elemental analysis, infrared spectroscopy, thermogravimetric analysis, single-crystal X-ray diffraction, and powder X-ray diffraction. The compounds 1–6 are isostructural and have a 1D layer architecture; the layers are linked by hydrogen bonding and π–π stacking interactions to form a 3D supramolecular framework. Hirshfeld surfaces and the luminescence properties of these complexes were also investigated. The 3-D Hirshfeld surfaces and 2-D fingerprint plots show that the main interactions are the O⋯H/H⋯O intermolecular interactions. Finely, preliminary emission experiments have been carried out on the compounds 3 and 5

(Adipato-2O,O')diaqua[bis(pyridin-2-yl-N)amine]cobalt(II) trihydrate

In the monomeric title complex, [Co(C6H8O4)(C10H9N3)(H2O)2]·3H2O, the distorted octahedral CoN2O4 coordination environment comprises two N-atom donors from the bidentate dipyridyldiamine ligand, two O-atom donors from one of the carboxylate groups of the bidentate chelating adipate ligand and two water molecules. In addition, there are three solvent water molecules which are involved in both intra- and inter-unit O-HO hydrogen-bonding interactions, which together with an amine-water N-HO hydrogen bond produce a three-dimensional framework

Crystal structure, characterization and chemical reactivity of novel piperazine derivative ligand for electrochemical recognition of nitrite anion

International audienceAbstract: A novel piperazine derivative (3E,3′E)-3,3′-(((piperazine-1,4-diyl bis (ethane-2,1-diyl)) bis (azanediyl)) bis (ethan1-yl-1-ylidene)) bis (6-methyl-2H-pyran-2,4(3H)-dione) (2E-Peaemp) has been synthesized and characterized by ESI-MS, Single-crystal X-ray diffraction, NMR (1H NMR, 13C NMR and 2D NMR), ATR-FTIR, UV-Visible and SEM. The theoretical study of chemical reactivity of 2E-Peaemp was investigated using DFT method. The oxidation-reduction processes and interaction between 2E-Peaemp and nitrite ions were studied using cyclic voltammetry technique. In addition, the detection of NO2− was investigated in 0.1 M PBS solution (pH = 7.0) using a carbon paste electrode modified with reduced graphene oxide-graphite carbon/2E-Peaemp system (rGO-GC/2E-Peaemp). XRD study showed that 2E-Peaemp crystallizes in a monoclinic system with P21/c space group, and the results obtained from theoretical study well support the experimental results. According to DFT study, HOMO (Highest Occupied Molecular Orbitals)-LUMO (Lowest Unoccupied Molecular Orbitals) energy gap (Egap) and other reactivity descriptors were calculated. The results showed that the ligand exhibits a high chemical reactivity and low kinetic stability. Finally, the cyclic voltammetry measurements showed significant current responses of rGO-GC/2E-Peaemp electrode towards NO2− in the concentration range of 0–4 mM with a low limit of detection (LOD = 0.83 μM). Graphic abstract: New ligand (2E-Peaemp: (3E,3′E)-3,3′-(((piperazine-1,4-diyl bis (ethane-2,1-diyl)) bis (azanediyl)) bis (ethan1-yl-1-ylidene)) bis (6-methyl-2H-pyran-2,4(3H)-dione)) has been synthesized and characterized by XRD technique. The reactivity descriptors have been calculated by DFT. The ligand was used for electrochemical recognition of nitrite anion. The cyclic voltammetry showed that the modified electrode with 2E-Peaemp exhibits low detection limit towards NO2−.[Figure not available: see fulltext.] © 2021, Indian Academy of Sciences