Poly­[[di­aqua­cobalt(II)]‐μ‐4,4′‐bi­pyridine‐κ2N:N′‐μ‐p‐phenyl­enebis­(oxy­acetato)‐κ2O:O′]

The title compound, [Co^II(C₁₀H₈O₆)(C₁₀H₈N₂)(H₂O)₂]_n, was obtained by the hydro­thermal reaction of CoSO₄ with benzene‐1,4‐dioxy­di­acetate [systematic name: p‐phenyl­ene­bis­(oxy­acetate)] and 4,4′‐bi­pyridine (4,4′‐bpy). The Co atom lies at an inversion center and the benzene‐1,4‐dioxydiacetate and 4,4′‐bipyridine moieties lie about other inversion centers. The benzene‐1,4‐dioxydiacetate ligands bridge the octahedral Co^II coordination centers, forming a one‐dimensional zigzag chain. The chains are further bridged by 4,4′‐bpy ligands, forming a novel two‐dimensional supramolecular architecture. Hydro­gen‐bonding interactions between the coordinated water mol­ecules and the carboxyl­ate O atoms lead to the formation of a three‐dimensional network structure.     

catena‐Poly[[[cis‐aqua­bis(4‐carboxy­cyclo­hexane‐1‐carboxyl­ato‐κ2O,O′)cadmium(II)]‐μ‐4,4′‐bipyridine‐κ2N:N] monohydrate]

The title complex, {[Cd(C₈H₁₁O₄)₂(C₁₀H₈N₂)(H₂O)]·H₂O}_n, consists of linear chains formed through 4,4′‐bipyridine ligands linking seven‐coordinated Cd^II ions. Each Cd^II ion is in a distorted penta­gonal–bipyramidal environment, coordinated by one water ligand, two 4‐carboxy­cyclo­hexane‐1‐carboxyl­ate ligands and one bridging 4,4′‐bipyridine ligand to generate linear chains. The water mol­ecules and the Cd atom on one side, and the 4,4′‐bipyridine unit on the other, are bisected by two sets of twofold axes. The carboxylate group of the 4‐carboxy­cyclo­hexane‐1‐carboxyl ligand chelates a Cd^II ion, while the (protonated) carboxyl group forms hydrogen bonds with adjacent chains, resulting in a layered structure. This is the first reported occurrence of a dicarboxycyclo­hexane ligand exhibiting a non‐bridging coordination mode.     

Aqua­(di‐2‐pyridylamine)oxalato­copper(II) monohydrate

In the structure of the title complex, [Cu(C₂O₄)(C₁₀H₉N₃)(H₂O)]·H₂O, the Cu^II atom displays a square‐pyramidal geometry, being coordinated by two N atoms from the di‐2‐pyridylamine ligand, two O atoms from the oxalate group and one O atom of a water mol­ecule. The complex mol­ecules are linked to form a three‐dimensional supra­molecular array by hydrogen‐bonding inter­actions between coordinated/uncoordinated water mol­ecules and the uncoordinated oxalate O atoms of neighboring mol­ecules.     

Bis(3‐amino­pyridine‐κN)(4,4′‐di­methyl‐2,2′‐bipyridine‐κ2N,N′)(per­chlorato‐κO)copper(II) per­chlorate

The title compound, [Cu(ClO₄)(C₅H₆N₂)₂(C₁₂H₁₂N₂)]ClO₄, was prepared by in situ partial ligand substitution between 3‐amino­pyridine and 4,4′‐dimethyl‐2,2′‐bipyridine at room temperature. The central copper(II) ion is five‐coordinated by one bidentate 4,4′‐dimethyl‐2,2′‐bipyridine mol­ecule, two monodentate pyridine‐coordinated 3‐amino­pyridine mol­ecules and one apical O atom from the perchlorate counter‐ion. Inter­molecular N—H⋯O and C—H⋯O hydrogen‐bonding inter­actions form a hydrogen‐bond‐sustained network.     

catena‐Poly­[[[aqua­copper(I)]‐μ‐4,4′‐bipyridyl‐κ2N:N′] hemi­(isophthalate) monohydrate]

The title compound, {[Cu(C₁₀H₈N₂)(H₂O)](C₈H₄O₄)_0.5·H₂O}_n, has been synthesized hydro­thermally and characterized by single‐crystal X‐ray diffraction. The compound consists of nearly linear one‐dimensional chains of [Cu(4,4′‐bipy)(H₂O)]_nⁿ⁺ cations (4,4′‐bipy is 4,4′‐bipyridyl), surrounded by isophthalate anions and free water mol­ecules. Hydro­gen‐bonding interactions involving cationic chains, isophthalate anions and free water mol­ecules lead to the formation of a three‐dimensional network structure.     

Diaqua­malonato(1,10‐phenanthro­line)­zinc(II)

In the crystal structure of the title complex, [Zn(C₃H₂O₄)(C₁₂H₈N₂)(H₂O)₂], the Zn^II atom displays a distorted octa­hedral geometry, being coordinated by two N atoms from the 1,10‐phenanthroline ligand, two O atoms from different carboxyl­ate groups of the chelating malonate dianion and two O atoms of cis water mol­ecules. The complex mol­ecules are linked to form a three‐dimensional supramolecular array by both hydrogen‐bonding inter­actions between coordinated water molecules and the uncoordinated carboxyl­ate O atoms of neighboring mol­ecules, and aromatic π–π stacking inter­actions between neighboring phenanthroline rings.     

Poly­[[[aqua­manganese(II)]‐μ2‐4,4′‐bi­pyridine‐μ3‐succinato] 4,4′‐bi­pyridine hemisolvate]

The polymeric title complex, {[Mn(C₄H₄O₄)(C₁₀H₈N₂)(H₂O)]·0.5C₁₀H₈N₂}_n, possesses a three‐dimensional open‐framework structure, with the solvate 4,4′‐bi­pyridine (bipy) mol­ecules, which lie around centers of inversion, clathrated in the channels of the framework. The Mn^II center is surrounded by three succinate (succ) ligands, one water mol­ecule and two bipy ligands, and displays a slightly distorted octahedral coordination environment, with cis angles ranging from 84.14 (12) to 96.56 (11)°. Each succ dianion coordinates to three Mn^II atoms, thus acting as a bridging tridentate ligand; in turn, the Mn^II atoms are bridged by three succ ligands, thus forming a two‐dimensional Mn–succ sheet pillared by the bridging bipy ligands. Two hydrogen‐bonding interactions, involving the water mol­ecules and the carboxy O atoms of the succ ligands, are present in the crystal structure.     

Di­aqua(2,2′‐bi­pyridine)­malonato­manganese(II)

In the crystal structure of the title compound, [Mn(C₃H₂O₄)(C₁₀H₈N₂)(H₂O)₂], the Mn^II atom demonstrates a distorted octahedral geometry, being coordinated by two N atoms of a 2,2′‐bi­pyridine ligand, two O atoms from the carboxyl­ate groups of the chelating malonate dianion and two O atoms of two cis water mol­ecules. The complex mol­ecules are linked to form a three‐dimensional supramolecular array by both hydrogen‐bonding interactions between coordinated water and the carboxyl­ate groups of neighboring mol­ecules and aromatic π–π‐stacking interactions of the bi­pyridine rings.     

Aqua(2,2′‐bipyrid­yl)­chloro­nitrato­copper(II)

In a new hydrogen‐bonded three‐dimensional complex, [CuCl(NO₃)(C₁₀H₈N₂)(H₂O)], the Cu atom has an elongated tetra­gonal octa­hedral environment, with two 2,2′‐bipyridyl N atoms, one nitrate O atom and one Cl atom forming the equatorial plane, and a second O atom of the nitrate anion and a water mol­ecule in the axial positions. The complex mol­ecules are linked to form a three‐dimensional supra­molecular array by hydrogen‐bonding inter­actions both between the water O atom and nitrate O atoms, and between the water O atom and the Cl atom of a neighboring mol­ecule.     

The cocrystal of 3‐hydroxy‐2‐naphthoic acid and 4,4′‐bipyridine

4,4′‐Bipyridine cocrystallizes with 3‐hydroxy‐2‐naphthoic acid in a 1:2 ratio to give a centrosymmetric three‐component supra­molecular adduct, namely 3‐hydroxy‐2‐naphthoic acid–4,4′‐bipyridine (2/1), C₁₁H₈O₃·0.5C₁₀H₈N₂, in which 4,4′‐bipyridine is located on an inversion center. The pyridine–carboxylic acid heterosynthon generates an infinite one‐dimensional hydrogen‐bonded chain viaπ–π inter­actions between naphthyl and 4,4′‐bipyridine groups. The one‐dimensional chains are further assembled into a three‐dimensional network by weak C—H⋯π inter­actions between pyridyl and naphthyl rings, and C—H⋯O inter­actions between 3‐hydroxy‐2‐naphthoic acid mol­ecules.     

Aqua­bis(2‐nitro­benzoato‐κO)(1,10‐phenanthroline‐κ2N,N′)­zinc(II)

The title compound, [Zn(C₇H₄NO₄)₂(C₁₂H₈N₂)(H₂O)], has been synthesized. X‐Ray analysis reveals that it is a neutral zinc(II) mononuclear carboxyl­ate complex based on mixed N‐ and O‐donor ligands. The Zn atom is five‐coordinate in a distorted trigonal–bipyramidal coordination environment involving two O atoms of two monodentate 2‐nitro­benzoate mol­ecules, two N atoms of a 1,10‐phenanthroline mol­ecule and one O atom of a water mol­ecule. The axial positions are occupied by a carboxyl­ate O atom from the 2‐nitro­benzoate ligand and an N atom from the 1,10‐phenanthroline ligand [N—Zn—O = 167.66 (9)°].     

catena‐Poly[bis[tetraaquacobalt(II)‐μ‐4,4′‐bipyridine‐κ2N:N′] benzene‐1,2,4,5‐tetracarboxylate(4−) dihydrate]

The title compound, [Co(C₁₀H₈N₂)(H₂O)₄]₂(C₁₀H₂O₈)·2H₂O, consists of two crystallographically independent Co^II atoms linked by 4,4′‐bi­pyridine ligands into one‐dimensional chains, which are further connected into a three‐dimensional framework linked by [C₆H₂(COO)₄]^4? anions and water mol­ecules, achieved through complex hydrogen bonding.     

catena‐Poly[[[triaqua­cobalt(II)]‐μ‐2,6‐dioxo‐1,2,3,6‐tetra­hydro­pyrimidine‐4‐carboxyl­ato(2–)] 1.72‐hydrate]

The Co^II ion in the title complex {[Co(C₅H₂N₂O₄)(H₂O)₃]·1.72H₂O}_n, has a distorted octa­hedral coordination geometry comprised of three water ligands, one deprotonated pyrimidine N atom and an adjacent carboxyl­ate O atom of one orotate ligand. The sixth coordination site is occupied by an exocyclic O atom from a neighbouring orotate moiety, and through this inter­action a helicoidal chain is formed. The mol­ecules are linked by intra­molecular O_water—H⋯O and inter­molecular N—H⋯O and O_water—H⋯O hydrogen bonds, forming a three‐dimensional network.     

Poly[[[bis­(N,N′‐dimethyl­formamide)­zinc(II)]‐μ3‐5‐hydroxy­benzene‐1,3‐dicarboxyl­ato] toluene solvate]

The title compound, {[Zn(C₈H₄O₅)(C₃H₇NO)₂]·0.5C₇H₈}_n, is a one‐dimensional coordination polymer in which the Zn atoms are linked by bridging 5‐hydroxy­benzene‐1,3‐dicarboxyl­ate ligands. These polymeric chains form two‐dimensional sheets via interchain hydrogen bonds, and these sheets, in turn, are stacked tightly with solvent toluene mol­ecules in the inter­layer space. The N,N′‐dimethyl­formamide ligands, coordinated axially to the Zn atoms, form van der Waals contacts with ligands in neighboring sheets, and enclose the guest mol­ecules.     

Poly[[μ‐aqua‐bis­(μ‐2,4‐dichloro­phen­oxy­acetato)barium(II)] monohydrate]

In the title coordination polymer, {[Ba(C₈H₅Cl₂O₃)₂(H₂O)]·H₂O}_n, each Ba^II atom is nine‐coordinated by six carboxyl­ate O atoms and one ether O atom from five symmetry‐related 2,4‐dichloro­phenoxy­acetate ligands, and by two O atoms from water mol­ecules, thus defining a distorted tricapped trigonal prism. The Ba^II ions are bridged by bidentate water mol­ecules and by tridentate and tetra­dentate 2,4‐dichloro­phenoxy­acetate groups, leading to a two‐dimensional layer structure. The crystal structure is further stabilized by hydrogen‐bonding inter­actions within each layer.     

Tetra‐μ‐2‐fluoro­benzoato‐bis[aqua(4,4′‐bi­pyridine)(2‐fluorobenzoato)lanthanum(III)]

Each La³⁺ ion in the title complex, tetra‐μ‐2‐fluorobenzoato‐κ¹⁰O:O′;O:O,O′;O:O′;O,O′:O′‐bis[aqua(4,4′‐bipy­ridine‐κN)(2‐fluorobenzoato‐κO)lanthanum(II)], [La(C₇H₄FO₂)₆(C₁₀H₈N₂)₂(H₂O)₂], is coordinated by six O atoms from the carboxyl­ate groups of five 2‐fluoro­benzoate ligands, one O atom from a water mol­ecule and one N atom from a 4,4′‐bi­pyridine mol­ecule, thus forming a dimeric mol­ecule. An infinite one‐dimensional dimeric supramolecular chain is formed via intermolecular hydrogen bonds.     

A two‐dimensional manganese(II) coordination polymer: poly­[[di­aqua­manganese(II)]‐μ‐4,4‐bi­pyridine‐κ2N:N′‐μ‐(p‐phenyl­ene­dioxy­diacetato)‐κ2O:O′]

In the title two‐dimensional coordination polymer, [Mn(1,4‐BDOA)(4,4‐bipy)(H₂O)₂]_n [1,4‐BDOA²⁻ is the p‐phenyl­ene­dioxy­di­acetate dianion (C₁₀H₈O₆) and 4,4‐bipy is 4,4‐bi­pyridine (C₁₀H₈N₂)], each Mn^II atom displays octahedral coordination by two O atoms of the 1,4‐BDOA²⁻ groups, two N atoms of the 4,4‐bipy ligands and two solvent water mol­ecules. The Mn^II atom, 4,4‐bipy ligand and 1,4‐BDOA²⁻ group occupy different inversion centres. Adjacent Mn^II atoms are bridged by 1,4‐BDOA²⁻ groups and 4,4‐bipy ligands, forming a two‐dimensional network with Mn⋯Mn separations of 11.592 (2) and 11.699 (2) Å. Hydro­gen bonds from a water O—H group link the layers in the third dimension.     

Poly[[[aqua­(2,2′‐bipyridine‐κ2N,N′)manganese(II)]‐μ3‐acetyl­enedicarboxylato‐κ3O:O′:O′′] monohydrate]

In the title complex, {[Mn(C₄O₄)(C₁₀H₈N₂)(H₂O)]·H₂O}_n, each Mn^II ion has a distorted octa­hedral coordination formed by two N atoms of a 2,2′‐bipyridine ligand, three carboxyl O atoms of three different acetyl­ene­dicarboxyl­ate ligands and one coordinated water mol­ecule. The acetyl­ene­dicarboxyl­ate ligands act in a tridentate mode connecting adjacent Mn^II ions and constructing a two‐dimensional structure which can be regarded as an unusual plywood‐like stacked network.     

catena‐Poly[[aqua­bis(1H‐benzimidazole‐κN3)manganese(II)]‐μ‐adipato]

In the title polymeric complex, [Mn(C₆H₈O₄)(C₇H₆N₂)₂(H₂O)]_n, the Mn^II atom is surrounded by two adipate dianions, two benzimidazole mol­ecules and one coordinated water mol­ecule. The Mn atoms and coordinated water mol­ecule are located on a twofold axis, and the bridging adipate ligand is located on an inversion center. The adipate dianions bridge neighboring Mn^II atoms to form polymeric chains. Each Mn^II atom is seven‐coordinate, the longest Mn—O bond length being 2.5356 (16) Å.     

Two novel glycine metal halogenides: catena‐poly[[[diaqua­nickel(II)]‐di‐μ‐glycine] dibromide] and catena‐poly[[[tetra­aqua­magnesium(II)]‐μ‐glycine] dichloride]

In catena‐poly[[[diaqua­nickel(II)]‐di‐μ‐glycine] dibromide], {[Ni(C₂H₅NO₂)₂(H₂O)₂]Br₂}_n, (I), the Ni atom is located on an inversion centre. In catena‐poly[[[tetra­aqua­magnesium(II)]‐μ‐glycine] dichloride], {[Mg(C₂H₅NO₂)(H₂O)₄]Cl₂}_n, (II), the Mg atom and the non‐H atoms of the glycine mol­ecule are located on a mirror plane. All other atoms are located on general positions. The atomic arrangements of both compounds are characterized by [MO₆] octa­hedra (M = Ni or Mg) connected by glycine mol­ecules, with the halogenide ions in the inter­stices. In (I), four of the coordinating O atoms are from glycine and two are from water mol­ecules, building layers of octa­hedra and organic mol­ecules. In (II), two of the coordinating O atoms are from glycine and four are from water mol­ecules. The octa­hedra and organic mol­ecules form chains.