Poly[4,4′-imino­dipyridinium [tetra-μ3-oxido-tetra­oxido-di-μ4-phosphato-κ4 O:O′:O′′:O′′′-tetra­vanadium(V)]]

In the title salt, {(C10H11N3)[V4O8(PO4)2]}n, cubane-like [V4O8]4+ clusters are connected by phosphate anions into anionic [V4P2O16]n 2n− layers. These aggregate into the three-dimensional structure via N—H⋯O hydrogen-bonding mechanisms imparted by 4,4′-imino­dipyridinium dications situated between the layers

catena-Poly[[diazido­zinc(II)]-μ-di-4-pyridylamine-κ2 N:N′]

In the title compound, [Zn(N3)2(C10H9N3)]n, tetra­hedrally coordinated ZnII ions with two monodentate azide ligands are linked into zigzag one-dimensional chain motifs by di-4-pyridylamine (dpa) tethers. Individual [Zn(N3)2(dpa)]n chains are connected into supra­molecular layers via N—H⋯N hydrogen bonding between the central amine groups of the dpa ligands and terminal unligated azide N atoms. The azide ligands in one supra­molecular layer penetrate through the neighboring layers above and below, allowing stacking into a three-dimensional structure

μ-1,4-Bis(pyridin-4-ylmeth­yl)piperazine-κ2 N:N′-bis­[aqua­bis­(3-bromo-5-carb­oxy­benzoato-κO 1)copper(II)]

In the title compound, [Cu2(C8H4BrO4)4(C16H20N4)(H2O)2], slightly distorted square-planar-coordinated CuII ions are bound by one aqua ligand and two monodentate 3-bromo-5-carb­oxy­benzoate anions, and linked into a centrosymmetric dinuclear mol­ecule by a bridging 1,4-bis­(pyridin-4-ylmeth­yl)piperazine (4-bpmp) ligand. In the crystal, mol­ecules are connected into a supra­molecular two-dimensional network parallel to (131) via O—H⋯O hydrogen bonds involving the aqua ligands and 3-bromo-5-carb­oxy­benzoate carboxyl­ate groups

catena-Poly[[diaqua­cadmium(II)]bis­(μ-2,2-dimethyl­butane­dioato-κ4 O,O′:O′′,O′′′)[diaqua­cadmium(II)]-μ-1,4-bis­(3-pyridylmeth­yl)piperazine-κ2 N 3:N 3′]

In the title compound, [Cd2(C6H8O4)2(C16H20N4)(H2O)4]n, penta­gonal-bipyramidally coordinated CdII ions are connected into {Cd2(2,2-dimethyl­succinate)2(H2O)4} centrosymmetric dimeric clusters. In turn, these clusters are linked by tethering 1,4-bis­(3-pyridylmeth­yl)piperazine (3-bpmp) ligands into [Cd2(2,2-dimethyl­succinate)2(3-bpmp)(H2O)4]n coordination polymer chains. The chain motifs are oriented parallel to [10]. Individual chains are connected into supra­molecular layers via O—H⋯N and O—H⋯O hydrogen-bonding mechanisms

Poly[1,4-bis­(4-pyridylmeth­yl)piperazine­diium [[tetra­aqua­cobaltate(II)]-μ-pyromellitato-κ2 O 1:O 4] dihydrate]

In the title compound, {(C16H22N4)[Co(C10H2O8)(H2O)4]·2H2O}n, the octa­hedrally coordinated CoII atom is situated on an inversion center and possesses four aqua ligands. The Co atoms are linked into an anionic coordination polymer chain by bis-monodentate pyromellitate ligands. The chain motifs are connected into a supra­molecular layer by hydrogen bonding mediated by uncoordinated water mol­ecules. Charge balance is provided by doubly protonated bis­(4-pyridylmeth­yl)piperazine units, which are anchored to the coordination polymer chain motifs by N—H⋯O hydrogen bonding

Poly[di-μ3-chlorido-[μ2-(3-pyrid­yl)(4-pyrid­yl)methanone-κ2 N:N′]dicopper(I)]

In the title compound, [Cu2Cl2(C11H8N2O)]n, stair-like ribbons of formula [Cu2Cl2]n are linked into coordination polymer layers by tethering (3-pyrid­yl)(4-pyrid­yl)methanone (3,4′-dpk) ligands. The two distinct CuI centres both adopt distorted CuNCl3 tetra­hedral coordinations. Individual [Cu2Cl2(3,4′-dpk)]n layers stack in an AB pattern along the c direction by way of weak C—H⋯O inter­actions between the pyridyl rings and ketone O atoms

4-(4-Pyridylamino)pyridinium perchlorate

In the title salt, C10H10N3 +·ClO4 −, the 4-(4-pyridylamino)­pyridinium cations are linked into chains via N—H⋯N hydrogen bonding and into layers by C—H⋯π inter­actions [C⋯Cg = 3.3875 (19) Å]. Perchlorate ions are anchored to the layer motifs by N—H⋯O hydrogen bonding. The perchlorate anion was found to be disordered about a Cl—O axis, with two sites, each of equal occupancy, being resolved for the three remaining O atoms

Poly[[bis­[μ-1,4-bis­(3-pyridylmeth­yl)piperazine-κ2 N:N′]dichlorido­cadmium(II)] tetra­hydrate]

In the title compound, {[CdCl2(C16H20N4)2]·4H2O}n, octa­hedrally coordinated CdII ions, situated on crystallographic inversion centres, bearing trans-disposed chloride ligands, are linked into (4,4)-grid coordination polymer layers by tethering 1,4-bis­(3-pyridylmeth­yl)piperazine ligands. The layers are aligned parallel to the (01) crystal planes and aggregate by means of O—H⋯N, O—H⋯O and O—H⋯Cl hydrogen-bonding mechanisms imparted by cyclic water mol­ecule tetra­mers

catena-Poly[[[tetra­aqua­cobalt(II)]-μ-4,4′-bipyridine-κ2 N:N′] bis­(perchlorate) 4,4′-bipyridine disolvate dihydrate]

In the title compound, {[Co(C10H8N2)(H2O)4](ClO4)2·2C10H8N2·2H2O}n, slightly distorted octa­hedrally coordinated CoII ions situated on inversion centers are linked into polycationic chains through 4,4′-bipyridine tethering ligands. These are connected into supra­molecular layers by hydrogen bonding involving aqua ligands, perchlorate anions and uncoordinated water mol­ecules. A twofold inter­penetrated primitive cubic supra­molecular network is formed by the inter­action of pseudo-layers by hydrogen bonding between aqua ligands and unligated 4,4′-bipyridine mol­ecules