scholarly journals Silver(I) nitrate complexes of three tetrakis-thioether-substituted pyrazine ligands: metal–organic chain, network and framework structures

2017 ◽  
Vol 73 (3) ◽  
pp. 434-440 ◽  
Author(s):  
Tokouré Assoumatine ◽  
Helen Stoeckli-Evans
Keyword(s):  
Hydrogen Bonds ◽  
Coordination Sphere ◽  
Silver Atom ◽  
Rotation Axis ◽  
Metal Organic Framework ◽  
Chain Structure ◽  
Nitrate Anion ◽  
Asymmetric Unit ◽  
Metal Organic ◽  
Silver Atoms

The reaction of the ligand 2,3,5,6-tetrakis[(methylsulfanyl)methyl]pyrazine (L1) with silver(I) nitrate led to {[Ag(C12H20N2S4)](NO3)}n, (I),catena-poly[[silver(I)-μ-2,3,5,6-tetrakis[(methylsulfanyl)methyl]pyrazine] nitrate], a compound with a metal–organic chain structure. The asymmetric unit is composed of two half ligands, located about inversion centres, with one ligand coordinating to the silver atoms in a bis-tridentate manner and the other in a bis-bidentate manner. The charge on the metal atom is compensated for by a free nitrate anion. Hence, the silver atom has a fivefold S3N2coordination sphere. The reaction of the ligand 2,3,5,6-tetrakis[(phenylsulfanyl)methyl]pyrazine (L2) with silver(I) nitrate, led to [Ag2(NO3)2(C32H28N2S4)]n, (II), poly[di-μ-nitrato-bis{μ-2,3,5,6-tetrakis[(phenylsulfanyl)methyl]pyrazine}disilver], a compound with a metal–organic network structure. The asymmetric unit is composed of half a ligand, located about an inversion centre, that coordinates to the silver atoms in a bis-tridentate manner. The nitrate anion coordinates to the silver atom in a bidentate/monodentate manner, bridging the silver atoms, which therefore have a sixfold S2NO3coordination sphere. The reaction of the ligand 2,3,5,6-tetrakis[(pyridin-2-ylsulfanyl)methyl]pyrazine (L3) with silver(I) nitrate led to [Ag3(NO3)3(C28H24N6S4)]n, (III), poly[trinitrato{μ6-2,3,5,6-tetrakis[(pyridin-2-ylsulfanyl)methyl]pyrazine}trisilver(I)], a compound with a metal–organic framework structure. The asymmetric unit is composed of half a ligand, located about an inversion centre, that coordinates to the silver atoms in a bis-tridentate manner. One pyridine N atom bridges the monomeric units, so forming a chain structure. Two nitrate O atoms also coordinate to this silver atom, hence it has a sixfold S2N2O2coordination sphere. The chains are linkedviaa second silver atom, located on a twofold rotation axis, coordinated by the second pyridine N atom. A second nitrate anion, also lying about the twofold rotation axis, coordinates to this silver atomviaan Ag—O bond, hence this second silver atom has a threefold N2O coordination sphere. In the crystal of (I), the nitrate anion plays an essential role in forming C—H...O hydrogen bonds that link the metal–organic chains to form a three-dimensional supramolecular structure. In the crystal of (II), the metal–organic networks (lying parallel to thebcplane) stack up thea-axis direction but there are no significant intermolecular interactions present between the layers. In the crystal of (III), there are a number of C—H...O hydrogen bonds present within the metal–organic framework. The role of the nitrate anion in the formation of the coordination polymers is also examined.

scholarly journals The silver(I) nitrate complex of the ligandN-(pyridin-2-ylmethyl)pyrazine-2-carboxamide: a metal–organic framework (MOF) structure

2017 ◽  
Vol 73 (4) ◽  
pp. 535-538 ◽  
Author(s):  
Dilovan S. Cati ◽  
Helen Stoeckli-Evans
Keyword(s):  
Hydrogen Bonds ◽  
Coordination Sphere ◽  
Title Compound ◽  
Metal Organic Framework ◽  
Nitrate Complex ◽  
Screw Axis ◽  
Metal Organic ◽  
Nitrate Anions ◽  
Silver Atoms ◽  
Organic Framework

The reaction of silver(I) nitrate with the mono-substituted pyrazine carboxamide ligand,N-(pyridin-2-ylmethyl)pyrazine-2-carboxamide (L), led to the formation of the title compound with a metal–organic framework (MOF) structure, [Ag(C11H10N4O)(NO3)]n, poly[μ-nitrato-[μ-N-(pyridin-2-ylmethyl-κN)pyrazine-2-carboxamide-κN4]silver(I)]. The silver(I) atom is coordinated by a pyrazine N atom, a pyridine N atom, and two O atoms of two symmetry-related nitrate anions. It has a fourfold N2O2coordination sphere, which can be described as distorted trigonal–pyramidal. The ligands are bridged by the silver atoms forming–Ag–L–Ag–L–zigzag chains along thea-axis direction. The chains are arranged in pairs related by a twofold screw axis. They are linkedviathe nitrate anions, which bridge the silver(I) atoms in a μ2fashion, forming the MOF structure. Within the framework there are N—H...O and C—H...O hydrogen bonds present.

scholarly journals A [Cu3(μ3-O)]–pyrazolate metallacycle with terminal nitrate ligands exhibiting point group symmetry 3

2016 ◽  
Vol 72 (4) ◽  
pp. 492-494 ◽  
Author(s):  
Logesh Mathivathanan ◽  
Raquel Cruz ◽  
Raphael G. Raptis
Keyword(s):  
Hydrogen Bonds ◽  
Coordination Sphere ◽  
Title Compound ◽  
Complex Anion ◽  
Rotation Axis ◽  
Point Group ◽  
Group Symmetry ◽  
Nitrate Anion ◽  
Point Group Symmetry ◽  
Π Interactions

The trinuclear triangular cuprate anion of the title compound, tris[bis(triphenylphosphoranylidene)ammonium] tris(μ2-4-chloropyrazolato-κ2N:N′)-μ3-oxido-tris[(nitrato-κ2O,O′)cuprate(II)] nitrate monohydrate, (C36H30P2N)[Cu3(C3H2ClN2)3(NO3)3O]NO3·H2O, has point group symmetry 3., with the μ3-O atom located on the threefold rotation axis. The distorted square-pyramidal coordination sphere of the CuIIatom is completed by two N atoms oftrans-bridging pyrazolate groups and a chelating nitrate anion. The complex anion is slightly bent, with the nitrate and pyrazolate groups occupying positions above and below the Cu3plane, respectively. In the crystal, weak O—H...O and C—H...O hydrogen bonds, as well as π–π interactions, are present.

scholarly journals Silver(I) nitrate two-dimensional coordination polymers of two new pyrazinethiophane ligands: 5,7-dihydro-1H,3H-dithieno[3,4-b:3′,4′-e]pyrazine and 3,4,8,10,11,13-hexahydro-1H,6H-bis([1,4]dithiocino)[6,7-b:6′,7′-e]pyrazine

2020 ◽  
Vol 76 (4) ◽  
pp. 539-546 ◽  
Author(s):  
Tokouré Assoumatine ◽  
Helen Stoeckli-Evans
Keyword(s):  
Coordination Polymer ◽  
Silver Nitrate ◽  
Coordination Sphere ◽  
Silver Atom ◽  
Rotation Axis ◽  
Nitrate Anion ◽  
Two Dimensional ◽  
Supramolecular Framework ◽  
Inversion Center ◽  
Twist Boat

The two new pyrazineophanes, 5,7-dihydro-1H,3H-dithieno[3,4-b:3′,4′-e]pyrazine, C8H8N2S2, L1, and 3,4,8,10,11,13-hexahydro-1H,6H-bis([1,4]dithiocino)[6,7-b:6′,7′-e]pyrazine, C12H16N2S4, L2, both crystallize with half a molecule in the asymmetric unit; the whole molecules are generated by inversion symmetry. The molecule of L1, which is planar (r.m.s. deviation = 0.008 Å), consists of two sulfur atoms linked by a rigid tetra-2,3,5,6-methylenepyrazine unit, forming planar five-membered rings. The molecule of L2 is step-shaped and consists of two S–CH2–CH2–S chains linked by the central rigid tetra-2,3,5,6-methylenepyrazine unit, forming eight-membered rings that have twist-boat-chair configurations. In the crystals of both compounds, there are no significant intermolecular interactions present. The reaction of L1 with silver nitrate leads to the formation of a two-dimensional coordination polymer, poly[(μ-5,7-dihydro-1H,3H-dithieno[3,4-b;3′,4′-e]pyrazine-κ2 S:S′)(μ-nitrato-κ2 O:O′)silver(I)], [Ag(NO3)(C8H8N2S2)] n , (I), with the nitrato anion bridging two equivalent silver atoms. The central pyrazine ring is situated about an inversion center and the silver atom lies on a twofold rotation axis that bisects the nitrato anion. The silver atom has a fourfold AgO2S2 coordination sphere with a distorted shape. The reaction of L2 with silver nitrate also leads to the formation of a two-dimensional coordination polymer, poly[[μ33,4,8,10,11,13-hexahydro-1H,6H-bis([1,4]dithiocino)[6,7-b;6′,7′-e]pyrazine-κ3 S:S′:S′′](nitrato-κO)silver(I)], [Ag(NO3)(C12H16N2S4)] n , (II), with the nitrate anion coordinating in a monodentate manner to the silver atom. The silver atom has a fourfold AgOS3 coordination sphere with a distorted shape. In the crystals of both complexes, the networks are linked by C—H...O hydrogen bonds, forming supramolecular frameworks. There are additional C—H...S contacts present in the supramolecular framework of II.

scholarly journals Imidazole-containing Cd Metal-Organic Framework with Selective Adsorption Properties

2019 ◽  
Vol 118 ◽  
pp. 01044
Author(s):  
Yu-Ling Li ◽  
Zin Zheng ◽  
Hui Nie ◽  
Chun-Mei Zhao ◽  
Yu-Fei Wang ◽  
...  
Keyword(s):  
Hydrogen Bonds ◽  
Selective Adsorption ◽  
Metal Organic Framework ◽  
Chain Structure ◽  
Adsorption Properties ◽  
X Ray Diffraction ◽  
X Ray ◽  
1D Chain ◽  
Metal Organic ◽  
Organic Framework

Metal-organic framework material [Cd(tib)(dnbpdc) (H2O)]·2DMF·2H2O (1) [tib = 1, 3, 5-tris(1-imidazolyl)benzene, H2dnbpdc = 2, 2′-dinitro-4, 4′-biphenyldicarboxylic acid] was synthesized and characterized by Thermogravimetric analyses (TGA), Powder X-ray diffraction (PXRD) analyses and Bruker D8 Advance X-ray diffractometer. The results showed that 1 was a 1D chain structure to be joined together by hydrogen bonds to generate a 3D supramolecular structure. CO2 and N2 adsorption behavior of the material was studied. It is significative that 1 can selective sorption of CO2.

A fivefold interpenetrating diamond-like three-dimensional metal–organic framework: poly[(μ2-benzene-1,4-diacetato)[μ2-1,6-bis(1,2,4-triazol-1-yl)hexane]zinc(II)]

2012 ◽  
Vol 68 (11) ◽  
pp. m309-m311 ◽  
Author(s):  
Jun Wang ◽  
Xiao-Juan Xu ◽  
Jian-Qing Tao ◽  
Chun-Yun Tan
Keyword(s):  
Rotation Axis ◽  
Metal Organic Framework ◽  
Three Dimensional ◽  
Mixed Ligand ◽  
Diacetic Acid ◽  
Asymmetric Unit ◽  
Polymeric Compound ◽  
Coordination Environment ◽  
Metal Organic ◽  
Organic Framework

In the mixed-ligand metal–organic title polymeric compound, [Zn(C10H8O4)(C10H16N6)]nor [Zn(PBEA)(BTH)]n[H2PBEA is benzene-1,4-diacetic acid and BTH is 1,6-bis(1,2,4-triazol-1-yl)hexane], the asymmetric unit contains a ZnIIatom, one half of a BTH ligand and one half of a doubly deprotonated H2PBEA ligand. Each ZnIIcentre lies on a crystallographic twofold rotation axis and is four-coordinated by two O atoms from two distinct PBEA2−ligands and two N atoms from two different BTH ligands in a {ZnO2N2} coordination environment. The three-dimensional topology of the title compound corresponds to that of a fivefold interpenetrating diamond-like metal–organic framework.

scholarly journals Crystal structure of catena-poly[[gold(I)-μ-cyanido-[diaquabis(2-phenylpyrazine)iron(II)]-μ-cyanido] dicyanidogold(I)]

2019 ◽  
Vol 75 (8) ◽  
pp. 1149-1152 ◽  
Author(s):  
Olesia I. Kucheriv ◽  
Diana D. Barakhtii ◽  
Sergey O. Malinkin ◽  
Sergiu Shova ◽  
Il'ya A. Gural'skiy
Keyword(s):  
Crystal Structure ◽  
Hydrogen Bonds ◽  
Rotation Axis ◽  
Metal Organic Framework ◽  
Octahedral Geometry ◽  
Water Molecules ◽  
Stacking Interactions ◽  
Polymeric Complex ◽  
Polymeric Chains ◽  
Metal Organic

In the title polymeric complex, {[Fe(CN)2(C10H8N2)2(H2O)2][Au(CN)2]} n , the FeII ion, which is located on a twofold rotation axis, has a slightly distorted FeN4O2 octahedral geometry. It is coordinated by two phenylpyrazine molecules, two water molecules and two dicyanoaurate anions, the Au atom also being located on a second twofold rotation axis. In the crystal, the coordinated dicyanoaurate anions bridge the FeII ions to form polymeric chains propagating along the b-axis direction. In the crystal, the chains are linked by Owater—H...Ndicyanoaurate anions hydrogen bonds and aurophillic interactions [Au...Au = 3.5661 (3) Å], forming layers parallel to the bc plane. The layers are linked by offset π–π stacking interactions [intercentroid distance = 3.643 (3) Å], forming a supramolecular metal–organic framework.

Divergent Adsorption Behavior Controlled by Primary Coordination Sphere Anions in the Metal–Organic Framework Ni2X2BTDD

2021 ◽  
Author(s):  
Julius J. Oppenheim ◽  
Jenna L. Mancuso ◽  
Ashley M. Wright ◽  
Adam J. Rieth ◽  
Christopher H. Hendon ◽  
...  
Keyword(s):  
Coordination Sphere ◽  
Metal Organic Framework ◽  
Adsorption Behavior ◽  
Metal Organic ◽  
Organic Framework

scholarly journals Crystal structures of two stilbazole derivatives: bis{(E)-4-[4-(diethylamino)styryl]-1-methylpyridin-1-ium} tetraiodidocadmium(II) and (E)-4-[4-(diethylamino)styryl]-1-methylpyridin-1-ium 4-methoxybenzenesulfonate monohydrate

2018 ◽  
Vol 74 (12) ◽  
pp. 1891-1894
Author(s):  
Priya Antony ◽  
S. Antony Inglebert ◽  
Jerald V. Ramaclus ◽  
S. John Sundaram ◽  
P. Sagayaraj
Keyword(s):  
Hydrogen Bonds ◽  
Rotation Axis ◽  
Stacking Interactions ◽  
Tetrahedral Coordination ◽  
Asymmetric Unit ◽  
Methyl Group ◽  
Diethyl Amine ◽  
Molecular Salts ◽  
Benzene Rings ◽  
Distorted Tetrahedral Coordination

The title molecular salts, (C18H23N2)2[CdI4], (I), and C18H23N2 +·C7H7O4S−·H2O, (II), are stilbazole, or 4-styrylpyridine, derivatives. The cation, (E)-4-[4-(diethylamino)styryl]-1-methylpyridin-1-ium, has a methyl group attached to pyridine ring and a diethyl amine group attached to the benzene ring. The asymmetric unit of salt (I), comprises one cationic molecule and half a CdI4 dianion. The Cd atom is situated on a twofold rotation axis and has a slightly distorted tetrahedral coordination sphere. In (II), the anion consists of a 4-methoxybenzenesulfonate and it crystallizes as a monohydrate. In both salts, the cations adopt an E configuration with respect to the C=C bond and the pyridine and benzene rings are inclined to each other by 10.7 (4)° in (I) and 4.6 (2)° in (II). In the crystals of both salts, the packing is consolidated by offset π–π stacking interactions involving the pyridinium and benzene rings, with centroid–centroid distances of 3.627 (4) Å in (I) and 3.614 (3) Å in (II). In the crystal of (II), a pair of 4-methoxybenzenesulfonate anions are bridged by Owater—H...Osulfonate hydrogen bonds, forming loops with an R 2 4(8) motif. These four-membered units are then linked to the cations by a number of C—H...O hydrogen bonds, forming slabs lying parallel to the ab plane.

scholarly journals Crystal structure of a polymeric calcium levulinate dihydrate:catena-poly[[diaquacalcium]-bis(μ2-4-oxobutanoato)]

2015 ◽  
Vol 71 (5) ◽  
pp. 494-497
Author(s):  
Ananda S. Amarasekara ◽  
Dominique T. Sterling-Wells ◽  
Carlos Ordonez ◽  
Marie-Josiane Ohoueu ◽  
Marina S. Fonari
Keyword(s):  
Hydrogen Bonds ◽  
Rotation Axis ◽  
Three Dimensional ◽  
Axial Direction ◽  
Chain Structure ◽  
Dimensional Structure ◽  
Polymeric Chain ◽  
Water Molecules ◽  
Carboxylate Ligands ◽  
Length Range

In the title calcium levulinate complex, [Ca(C5H7O3)2(H2O)2]n, the Ca2+ion lies on a twofold rotation axis and is octacoordinated by two aqua ligands and six O atoms from four symmetry-related carboxylate ligands, giving a distorted square-antiprismatic coordination stereochemistry [Ca—O bond-length range = 2.355 (1)–2.599 (1) Å]. The levulinate ligands act both in a bidentate carboxylO,O′-chelate mode and in a bridging mode through one carboxyl O atom with an inversion-related Ca2+atom, giving a Ca...Ca separation of 4.0326 (7) Å. A coordination polymeric chain structure is generated, extending along thec-axial direction. The coordinating water molecules act as double donors and participate in intra-chain O—H...O hydrogen bonds with carboxyl O atoms, and in inter-chain O—H...O hydrogen bonds with carbonyl O atoms, thus forming an overall three-dimensional structure.

scholarly journals Crystal structure of the co-crystalline adduct 1,3,6,8-tetraazatricyclo[4.4.1.13,8]dodecane (TATD)–4-bromophenol (1/2)

2015 ◽  
Vol 71 (5) ◽  
pp. 463-465 ◽  
Author(s):  
Augusto Rivera ◽  
Juan Manuel Uribe ◽  
Jicli José Rojas ◽  
Jaime Ríos-Motta ◽  
Michael Bolte
Keyword(s):  
Crystal Structure ◽  
Solid State ◽  
Hydrogen Bonds ◽  
Rotation Axis ◽  
The Other ◽  
Two Dimensional ◽  
Asymmetric Unit ◽  
Species Association ◽  
Crystalline Adduct ◽  
Aminal Cage

The structure of the 1:2 co-crystalline adduct C8H16N4·2C6H5BrO, (I), from the solid-state reaction of 1,3,6,8-tetraazatricyclo[4.4.1.13,8]dodecane (TATD) and 4-bromophenol, has been determined. The asymmetric unit of the title co-crystalline adduct comprises a half molecule of aminal cage polyamine plus a 4-bromophenol molecule. A twofold rotation axis generates the other half of the adduct. The primary inter-species association in the title compound is through two intermolecular O—H...N hydrogen bonds. In the crystal, the adducts are linked by weak non-conventional C—H...O and C—H...Br hydrogen bonds, giving a two-dimensional supramolecular structure parallel to thebcplane.

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