catena‐Poly[[silver(I)‐μ‐[9,10‐bis(1H‐benzimidazol‐1‐ylmethyl)anthracene]‐κ2N3:N3′] bis(nitrato‐κO)silver(I)]

Yellow needle‐shaped crystals of the title compound, {[Ag(C₃₀H₂₂N₄)][Ag(NO₃)₂]}_n, were obtained by the reaction of AgNO₃ and 9,10‐bis(benzimidazol‐1‐ylmethyl)anthracene (L) in a 2:1 ratio. The asymmetric unit consists of two Ag^I cations, one half L ligand and one nitrate anion. One Ag^I cation occupies a crystallographic inversion centre and links two N‐atom donors of two distinct L ligands to form an infinite one‐dimensional coordination polymer. The second Ag^I cation lies on a crystallographic twofold axis and is coordinated by two O‐atom donors of two nitrate anions to form an [Ag(NO₃)₂]⁻ counter‐ion. The polymeric chains are linked into a supramolecular framework via weak Ag...O [3.124 (5) Å] and Ag...π (2.982 Å) interactions (π is the centroid of an outer anthracene benzene ring). The π interactions contain two short Ag...C contacts [2.727 (6) and 2.765 (6) Å], which can be considered to define Ag–η²‐anthracene bonding interactions. In comparison with a previously reported binuclear Ag^I complex [Du, Hu, Zhang, Zeng & Bu (2008). CrystEngComm, 10 , 1866–1874], this new one‐dimensional coordination polymer was obtained by changing the metal–ligand ratio during the synthesis.     

A three‐dimensional supramolecular framework of silver(I), 2‐phenylquinoline‐4‐carboxylate and 4,4′‐bipyridine

A novel supramolecular framework, catena‐poly[[[aqua(2‐phenylquinoline‐4‐carboxylato‐κO)silver(I)]‐μ‐4,4′‐bipyridine‐κ²N:N′] dihydrate], {[Ag(C₁₆H₁₀NO₂)(C₁₀H₈N₂)(H₂O)]·2H₂O}_n, has been synthesized and structurally characterized. The Ag^I centres are four‐coordinated and bridged by 4,4′‐bipyridine (4,4′‐bipy) ligands to form a one‐dimensional Ag–bipy chain. The Ag–bipy chains are further linked together by intermolecular O—H...O and O—H...N hydrogen‐bonding interactions between adjacent chains, resulting in a three‐dimensional framework.     

Diamminesilver(I) bis(2‐amino‐5‐nitrobenzoato‐κ2O1,O1′)silver(I): a two‐dimensional supramolecular sheet with a short intersheet distance containing a rare four‐coordinate planar silver(I) centre

The asymmetric unit of the title compound, [Ag(NH₃)₂][Ag(C₇H₅N₂O₄)₂], comprises half an [Ag(NH₃)₂]⁺ cation and half an [Ag(anbz)₂]⁻ anion (anbz is 2‐amino‐5‐nitrobenzoate). Both Ag^I ions are located on inversion centres. The cation has a linear coordination geometry with two symmetry‐related ammine ligands. The Ag^I cation in the anionic part shows a rare four‐coordinate planar geometry completed by two chelating symmetry‐related anbz ligands. Intra‐ and intermolecular N—H...O hydrogen bonds create a slightly undulating two‐dimensional supramolecular sheet. Adjacent sheets are only ca 3.3 Å apart. Ag...O, Ag...N and π–π stacking interactions consolidate the packing of the molecules in the solid state.     

catena‐Poly­[[di‐μ‐benzoato‐κ4O:O′‐disilver(I)]‐μ‐N,N′‐bis(2‐fluoro­benzyl­idene)­butane‐1,4‐di­amine‐κ2N:N′]

The title complex, [Ag₂(C₇H₅O₂)₂(C₁₈H₁₈F₂N₂)]_n, is a dinuclear silver(I) compound with one inversion centre between pairs of Ag atoms and another at the mid‐point of the central C—C bond in the butane‐1,4‐diamine moiety. Each of the smallest repeat units consists of two silver(I) cations, two benzoate anions and one N,N′‐bis(2‐fluorobenzyl­idene)­butane‐1,4‐di­amine Schiff base ligand. Each Ag^I ion is three‐coordinated in a trigonal configuration by two O atoms from two benzoate anions and one N atom from a Schiff base ligand. The di‐μ‐benzoato‐disilver(I) moieties are linked by the bridging Schiff base ligand, giving zigzag polymeric chains with an [–Ag⋯Ag—N—C—C—C—C—N–]_n backbone running along the b axis.     

catena‐Poly­[[(nitrato‐κ2O,O′)silver(I)]‐μ‐2,2′‐[1,4‐phenyl­enebis­(methyl­ene­thio)]­bis(5‐methyl‐1,3,4‐thia­diazo­le)‐κ2N3:N3′]

In the title complex, [Ag(NO₃)(C₁₄H₁₄N₄S₄)]_n, the Ag^I atom lies on a twofold axis and shows a distorted tetrahedral coordination, comprised of two N‐atom donors from two thia­diazole groups of separate ligands and two O‐atom donors from one nitrate ligand. Each bis­(thio­ether) ligand also lies on a twofold axis and bridges two adjacent Ag atoms to form an infinite chain along the c axis, with an Ag⋯Ag separation of 11.462 (4) Å. Adjacent one‐dimensional chains are further linked into double‐chain motifs through weak Ag⋯S and π–π stacking interactions.     

The coordination polymer poly[(μ3‐3‐aminocarbonylpyrazine‐2‐carboxylato‐κ3N1:O2:O2′)silver(I)]

The title compound, [Ag(C₆H₄N₃O₃)]_n or [Ag(pyzca)]_n (where pyzca is 3‐aminocarbonylpyrazine‐2‐carboxylate), (I), was obtained by silver‐catalysed partial hydrolysis of pyrazine‐2,3‐dicarbonitrile in aqueous solution. The compound has a distorted trigonal–planar coordination geometry around the Ag^I ion, with each ligand bridging three Ag^I ions to form a one‐dimensional strand of molecules parallel to the b axis. An extensive hydrogen‐bond pattern connects these strands to form a three‐dimensional network of mog topology.     

A stair‐like two‐dimensional silver(I) coordination polymer of N′‐(3‐cyanobenzylidene)nicotinohydrazide

The structure of the title compound, poly[[[μ₃‐N′‐(3‐cyanobenzylidene)nicotinohydrazide]silver(I)] hexafluoroarsenate], {[Ag(C₁₄H₁₀N₄O)](AsF₆)}_n, at 173 K exhibits a novel stair‐like two‐dimensional layer and a three‐dimensional supramolecular framework through C—H...Ag hydrogen bonds. The Ag^I cation is coordinated by three N atoms and one O atom from N′‐(3‐cyanobenzylidene)nicotinohydrazide (L) ligands, resulting in a distorted tetrahedral coordination geometry. The organic ligand acts as a μ₃‐bridging ligand through the pyridyl and carbonitrile N atoms and deviates from planarity in order to adapt to the coordination geometry. Two ligands bridge two Ag^I cations to construct a small 2+2 Ag₂L₂ ring. Four ligands bridge one Ag^I cation from each of four of these small rings to form a large grid. An interesting stair‐like two‐dimensional (3,6)‐net is formed through Ag^I metal centres acting as three‐connection nodes and through L molecules as tri‐linkage spacers.     

A two‐dimensional undulating AgI coordination polymer constructed of Ag—C and Ag—O bonds: poly[[[μ3‐(5,6‐η):κO2:κO2‐(±)‐(1S,2S,3R,4R)‐3‐carboxy‐7‐oxabicyclo[2.2.1]hept‐5‐ene‐2‐carboxylato]silver(I)] monohydrate]

The title coordination polymer, {[Ag(C₈H₇O₅)]·H₂O}_n, is built from Ag⁺ cations and singly protonated dehydronorcantharidin (SP‐DNC) anions, with a distorted trigonal‐planar geometry at the metal centre. The coordination number of Ag^I is three (with one Ag—π bond and two Ag—O bonds, one from each of three different SP‐DNC ligands), if only formal Ag–ligand bonds are considered, but can be regarded as five if longer weak Ag...O interactions are also included. The two‐dimensional corrugated‐sheet coordination polymer forms a non‐interpenetrating framework with (4.8²) topology. Disordered water molecules are sandwiched between the sheets.     

catena‐Poly[[[(iminodiacetato‐κO)silver(I)]‐μ3‐2‐aminopyrimidine‐κ3N1:N2:N3] monohydrate]: a one‐dimensional silver(I) coordination polymer with mixed ligands

The title compound, {[Ag(C₄H₆NO₄)(C₄H₅N₃)]·H₂O}_n, was synthesized by the reaction of silver(I) nitrate with 2‐aminopyrimidine and iminodiacetic acid. X‐ray analysis reveals that the crystal structure contains a one‐dimensional ladder‐like Ag^I coordination polymer and that N—H...O and O—H...O hydrogen bonding results in a three‐dimensional network. The Ag^I centre is four‐coordinated by three N atoms from three different 2‐aminopyrimidine ligands and one O atom from one iminodiacetate ligand. Comparison of the structural features with previous findings suggests that the existence of a second ligand plays an important role in the construction of such polymer frameworks.     

catena‐Poly[[disilver(I)(Ag—Ag)‐bis[μ‐1,1′‐(butane‐1,4‐diyl)diimidazole‐κ2N3:N3′]] bis(perchlorate)]: a double helix stabilized by ligand‐unsupported argentophilic interactions

The title compound, {[Ag₂(C₁₀H₁₄N₄)₂](ClO₄)₂}_n, is a one‐dimensional coordination polymer formed by Ag^I atoms linearly bridged by 1,1′‐(butane‐1,4‐diyl)diimidazole molecules. The chains have a helical arrangement and pairs of chains are held together by the rarely reported ligand‐unsupported Ag—Ag interaction [2.966 (1) Å], which results in a double‐helix structure. The double helix contains twisted 24‐membered metallomacrocycles, which are composed of four Ag atoms and two ligands. The Ag atoms lie on twofold axes.     

Bis(di‐2‐pyridylamine‐κ2N2,N2′)silver(I) trifluoromethanesulfonate: polar arrangement of trifluoromethanesulfonate anions in a pseudo‐centrosymmetric framework of coordination cations

The asymmetric unit of the title compound, [Ag(C₁₀H₉N₂)₂]CF₃SO₃ or [Ag(dpa)₂]OTf (dpa is di‐2‐pyridylamine and OTf is the trifluoromethanesulfonate anion), contains two [Ag(dpa)₂]⁺ coordination cations and two OTf anions. The coordination geometry of the Ag^I atom is intermediate between square‐planar and tetrahedral, with similar deformations at the two symmetry‐independent metal centres. The dpa ligands coordinate in a bidentate chelating mode. The OTf anions are in the outer coordination sphere and bridge the coordination cations via N—H...O interactions to form two symmetry‐independent hydrogen‐bonded chains. The [Ag(dpa)₂]⁺ cations are arranged via interactions involving the aromatic groups into a pseudo‐centrosymmetric three‐dimensional framework with two types of channels, each confining congeners of one of the symmetry‐independent anions. The most interesting feature of this structure is its bulk polarity resulting from an approximately parallel alignment of the anions in the channels.     

catena‐Poly­[1,4‐diazo­niabicyclo­[2.2.2]­octane [silver(I)‐tri‐μ‐thio­cyanato‐κ6S:S]]

The title compound, {(C₆H₁₄N₂)[Ag(NCS)₃]}_n, is a polymeric silver(I) complex. The Ag^I atom is hexacoordinated by the S atoms of six thio­cyanate anions, with each thio­cyanate S atom acting in a bridging mode to link the Ag atoms together. The unique Ag^I atom lies at a cell origin and has crystallo­graphically imposed symmetry. The diazonia[2.2.2]octane molecule lies about a site with imposed symmetry with the unique N atom on a threefold axis. The S and N atoms of the thio­cyanate ligands sit on a mirror plane and a threefold axis, respectively. The crystal structure consists of one‐dimensional chains, which are stabilized by N—H⋯N hydrogen bonds to form a three‐dimensional network.     

Bis(1,3,5‐triazine‐2,4,6‐triamine‐κN1)silver(I) nitrate

The title compound, [Ag(C₃H₆N₆)₂]NO₃, has an alternating two‐dimensional bilayer structure supported by extensive hydrogen bonds. The [Ag(melamine)₂]⁺ cationic monomers (melamine is 1,3,5‐triazine‐2,4,6‐triamine) are connected via N—H...N hydrogen bonds to form two‐dimensional sheets. Nitrate groups are sandwiched between two sheets through N—H...O hydrogen bonds. An almost perfectly linear coordination geometry is found for the Ag^I ions. The triazine ligands are slightly distorted due to π–π interactions.     

A novel one‐dimensional metal–organic framework with a μ‐cyanido‐argentate group: catena‐poly[[(5,5′‐dimethyl‐2,2′‐bipyridyl‐κ2N,N′)silver(I)]‐μ‐cyanido‐κ2N:C]

The design and synthesis of metal coordination and supramolecular frameworks containing N‐donor ligands and dicyanidoargentate units is of interest due to their potential applications in the fields of molecular magnetism, catalysis, nonlinear optics and luminescence. In the design and synthesis of extended frameworks, supramolecular interactions, such as hydrogen bonding, π–π stacking and van der Waals interactions, have been exploited for molecular recognition associated with biological activity and for the engineering of molecular solids.The title compound, [Ag(CN)(C₁₂H₁₂N₂)]_n, crystallizes with the Ag^I cation on a twofold axis, half a cyanide ligand disordered about a centre of inversion and half a twofold‐symmetric 5,5′‐dimethyl‐2,2′‐bipyridine (5,5′‐dmbpy) ligand in the asymmetric unit. Each Ag^I cation exhibits a distorted tetrahedral geometry; the coordination environment comprises one C(N) atom and one N(C) atom from substitutionally disordered cyanide bridging ligands, and two N atoms from a bidentate chelating 5,5′‐dmbpy ligand. The cyanide ligand links adjacent Ag^I cations to generate a one‐dimensional zigzag chain. These chains are linked together via weak nonclassical intermolecular interactions, generating a two‐dimensional supramolecular network.     

Tetra­kis(μ2‐1,8‐naphthyridine)‐1:2κ4N:N′;3:4κ4N:N′‐bis­(μ2‐salicylato)‐1:4κ2O:O′;2:3κ2O:O′‐tetrakis­(salicylic acid)‐1κO,2κO,3κO,4κO‐tetra­silver(I)(4 Ag—Ag)

The title complex, [Ag₄(C₇H₅O₃)₂(C₈H₆N₂)₄(C₇H₆O₃)₄], lies about an inversion centre and has a unique tetra­nuclear structure consisting of four Ag^I atoms bridged by four N atoms from two 1,8‐naphthyridine (napy) ligands to form an N:N′‐bridge and four O atoms from two salicylate (SA) ligands to form an O:O′‐bridge. The Ag atoms have distorted octa­hedral coordination geometry. The centrosymmetric Ag₄ ring has Ag—Ag separations of 2.772 (2) and 3.127 (2) Å, and Ag—Ag—Ag angles of 107.70 (4) and 72.30 (4)°. All SA hydroxy groups take part in intra­molecular O—H⋯O hydrogen bonding. In the crystal packing, the napy rings are oriented parallel and overlap one another. These π–π inter­actions, together with weak inter­molecular C—H⋯O contacts, stabilize the crystal structure.     

Poly[μ7‐sulfanediyldiacetato‐disilver(I)]

In the title coordination polymer, [Ag₂(C₄H₄O₄S)], each Ag^I cation is four‐coordinated by three of the four carboxylate O atoms and the S atom from symmetry‐related sulfanediyldiacetate ligands, thus defining a distorted tetrahedral geometry at the metal centre. The Ag^I cations are bridged by sulfanediyldiacetate groups, leading to a two‐dimensional layer structure. These layers are interconnected via Ag—S bonds to form a three‐dimensional coordination polymer network overall.     

Two novel silver(I) coordination polymers: poly[(μ2‐2‐aminopyrimidine‐κ2N1:N3)bis(μ3‐thiocyanato‐κ3S:S:S)disilver(I)] and poly[(2‐amino‐4,6‐dimethylpyrimidine‐κN)(μ3‐thiocyanato‐κ3N:S:S)silver(I)]

2‐Aminopyrimidine (L1) and 2‐amino‐4,6‐dimethylpyrimidine (L2) have been used to create the two novel title complexes, [Ag₂(NCS)₂(C₄H₅N₃)]_n, (I), and [Ag(NCS)(C₆H₉N₃)]_n, (II). The structures of complexes (I) and (II) are mainly directed by the steric properties of the ligands. In (I), the L1 ligand is bisected by a twofold rotation axis running through the amine N atom and opposite C atoms of the pyrimidine ring. The thiocyanate anion adopts the rare μ₃‐κ³S coordination mode to link three tetrahedrally coordinated Ag^I ions into a two‐dimensional honeycomb‐like 6³ net. The L1 ligands further extend the two‐dimensional sheet to form a three‐dimensional framework by bridging Ag^I ions in adjacent layers. In (II), with three formula units in the asymmetric unit, the L2 ligand bonds to a single Ag^I ion in a monodentate fashion, while the thiocyanate anions adopt a μ₃‐κ¹N,κ²S coordination mode to link the AgL2 subunits to form two‐dimensional sheets. These layers are linked by N—H...N hydrogen bonds between the noncoordinated amino H atoms and both thiocyanate and pyrimidine N atoms.     

catena‐Poly[[silver(I)‐μ‐1,3‐bis(4‐pyridyl)propane] hemi(naphthalene‐1,5‐disulfonate) dihydrate]: a three‐dimensional metallo‐supramolecular sandwich lamellar network

The title compound, {[Ag(C₁₃H₁₄N₂)](C₁₀H₆O₆S₂)_0.5·2H₂O}_n, (I), features a three‐dimensional supramolecular sandwich architecture that consists of two‐dimensional cationic layers composed of polymeric chains of silver(I) ions and 1,3‐bis(4‐pyridyl)propane (bpp) ligands, linked by Ag...Ag and π–π interactions, alternating with anionic layers in which uncoordinated naphthalene‐1,5‐disulfonate (nds²⁻) anions and solvent water molecules form a hydrogen‐bonded network. The asymmetric unit consists of one Ag^I cation linearly coordinated by N atoms from two bpp ligands, one bpp ligand, one half of an nds²⁻ anion lying on a centre of inversion and two solvent water molecules. The two‐dimensional {[Ag(bpp)]⁺}_n cationic and {[(nds)·2H₂O]²⁻}_n anionic layers are assembled into a three‐dimensional supramolecular framework through long secondary coordination Ag...O interactions between the sulfonate O atoms and Ag^I centres and through nonclassical C—H...O hydrogen bonds.     

Poly[bis(μ2‐2‐aminopyrazine‐κ2N1:N4)(μ2‐nitrato‐κ2O:O)(nitrato‐κ2O,O′)disilver(I)]: an achiral two‐dimensional coordination polymer forming chiral crystals

The solution reaction of AgNO₃ and 2‐aminopyrazine (apyz) in a 1:1 ratio gives rise to the title compound, [Ag₂(NO₃)₂(C₄H₅N₃)₂]_n, (I), which possesses a chiral crystal structure. In (I), both of the crystallographically independent Ag^I cations are coordinated in tetrahedral geometries by two N atoms from two apyz ligands and two O atoms from nitrate anions; however, the Ag^I centers show two different coordination environments in which one is coordinated by two O atoms from two different symmetry‐related nitrate anions and the second is coordinated by two O atoms from a single nitrate anion. The crystal structure consists of one‐dimensional Ag^I–apyz chains, which are further extended by μ₂‐κ²O:O nitrate anions into a two‐dimensional (4,4) sheet. N—H...O and C_apyz—H...O hydrogen bonds connect neighboring sheets to form a three‐dimensional supramolecular framework.     

catena‐Poly[bis[silver(I)‐μ2‐4,4′‐bipyridine‐κ2N:N′] naphthalene‐2,6‐dicarboxylate tetrahydrate]: self‐assembly of a supramolecular framework via coordination bonds and supramolecular interactions

The ultrasonic reaction of AgNO₃, 4,4′‐bipyridine (bipy) and naphthalene‐2,6‐dicarboxylic acid (H₂NDC) gives rise to the title compound, {[Ag₂(C₁₀H₈N₂)₂](C₁₂H₆O₄)·4H₂O}_n. The NDC dianion is located on an inversion centre. The Ag^I centre is coordinated in a linear manner by two N atoms from two bipy ligands. The crystal structure consists of one‐dimensional Ag^I–bipy cationic chains and two‐dimensional NDC–H₂O anionic sheets, constructed by coordination bonds and supramolecular interactions, respectively.