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Catena-Poly[[[diaqua-nickel(II)]-di-?-glycine] dichloride].

ABSTRACT: In the polymeric title complex, {[Ni(C(2)H(5)NO(2))(2)(H(2)O)(2)]Cl(2)}(n), the Ni(II) atom lies on an inversion center and is in a distorted octa-hedral NiO(6) configuration, with four carboxyl-ate O atoms from four zwitterionic glycine mol-ecules forming the equatorial plane and two water O atoms occupying the axial positions. The Cl(-) counterions lie in the inter-stices. The Ni(II) complexes are linked into polymeric sheets parallel to the bc plane. These sheets are then further connected into a three-dimensional network by O-H?O, O-H?Cl and N-H?Cl hydrogen bonds, together with weak C-H?O inter-actions.

SUBMITTER: Ch'ng CD

PROVIDER: S-EPMC2961767 | biostudies-literature | 2008 Jun

REPOSITORIES: biostudies-literature

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catena-Poly[bis-(4-amino-pyridinium) [[diaqua-manganese(II)]-di-?-chlorido] dichloride].

Project description:Single crystals of the title organic-inorganic hybrid, {(C(5)H(7)N(2))(2)[MnCl(2)(H(2)O)(2)]Cl(2)}(n), were synthesized from an ethanol solution containing manganese(II) chloride tetra-hydrate and 4-amino-pyridine under acidic conditions. The asymmetric unit contains a disordered organic cation (occupancies in the ratio 0.72:0.28), a chloride anion and an MnCl(H(2)O) moiety with the Mn(II) atom located on an inversion center. The structure is built up of infinite chains of edge-sharing [MnCl(4)(H(2)O)(2)] octa-hedra developing parallel to the a axis which are separated by the 4-amino-pyridinium ions and discrete chloride ions. The organic cations occupy the empty space around each inorganic chain. Structural cohesion is organized through N-H?Cl and O-H?Cl hydrogen bonds, which build up a three-dimensional network.

| S-EPMC2977461 | biostudies-literature

catena-Poly[[[di-μ(2)-hydroxido-bis-[(di-2-pyridylamine)nickel(II)]]-μ-fumarato] dihydrate].

Project description:The Ni(II) ion in the one-dimensional title complex, {[Ni(2)(C(4)H(2)O(4))(OH)(2)(C(10)H(9)N(3))(2)]·2H(2)O}(n), has a distorted square-pyramidal coordination environment formed by three O atoms from two bridging hydroxide groups and one carboxyl-ate group of the fumarate ligand and two pyridine N atoms from a di-2-pyridylamine (dpa) ligand. Two hydroxide groups link adjacent metal centers, forming a centrosymmetric four-membered [Ni(2)(OH)(2)] ring. In the crystal structure, the H atoms of the bridging hydroxide groups form inter-molecular hydrogen bonds to both water mol-ecules. These are further linked to the uncoordinated O atoms of the carboxyl-ate groups and the NH group of a dpa ligand to generate a three-dimensional network from the chains of the coordination polymer.

| S-EPMC2977588 | biostudies-literature

catena-Poly[[diaqua-nickel(II)]-?-7-oxabicyclo-[2.2.1]heptane-2,3-di-carboxyl-ato].

Project description:In the crystal structure of the title compound, [Ni(C(8)H(8)O(5))(H(2)O)(2)](n), the Ni(II) cation is in a Jahn-Teller-distorted octahedral coordination environment binding to two O atoms from water molecules, the bridging O atom of the bicycloheptane unit, two carboxylate O atoms from different carboxylate groups and one carboxylate O atom from a symmetry-related bridging ligand. The crystal structure is made up from layers propagating parallel to the bc plane.

| S-EPMC2969288 | biostudies-literature

catena-Poly[[diaqua-dipyridine-zinc(II)]-μ-succinato].

Project description:In the title compound, [Zn(C(4)H(4)O(4))(C(5)H(5)N)(2)(H(2)O)(2)](n), the Zn(II) ion (site symmetry ) is coordinated in an octahedral geometry by two pyridine mol-ecules, two water mol-ecules and two bridging centrosymmetric O-monodentate succinate dianions to create one-dimensional polymeric chains. The chains are cross-linked by O-H⋯O hydrogen bonds, forming sheets.

| S-EPMC2961033 | biostudies-literature

catena-Poly[[[diaqua-(di-2-pyridylamine-?N,N')nickel(II)]-?-fumarato-?O:O] tetra-hydrate].

Project description:In the crystal structure of the title compound, {[Ni(C(4)H(2)O(4))(C(10)H(9)N(3))(H(2)O)(2)]·4H(2)O}(n), zigzag chains are built up from cis-[Ni(dpya)(H(2)O)(2)](2+) cations (dpya is di-2-pyridylamine) linked by bis-monodentate coordinated bridging fumarate ligands. The Ni(II) atom is coordinated by one chelating dpya ligand, two aqua ligands in trans positions and two monodentate fumarate ligands in cis positions in the form of a deformed octa-hedron. The water mol-ecules, O atoms of the fumarate carboxyl-ate groups and the amine group of the dpya ligand are involved in an extended network of intra- and inter-molecular O-H?O hydrogen bonds. Moreover, ?-? inter-actions between the pyridine rings of the dpya ligand contribute to the stability of the structure. Two of the five uncoordinated water molecules are half-occupied.

| S-EPMC2979031 | biostudies-literature

catena-Poly[[diaqua-(2,2'-bipyridine-κN,N')nickel(II)]-μ-biphenyl-2,2'-dicarboxyl-ato-κO:O'].

Project description:In the title compound, [Ni(C(14)H(8)O(4))(C(10)H(8)N(2))(H(2)O)(2)](n), the Ni(II) atom is coordinated in a slightly distorted octa-hedral geometry by two water mol-ecules, two N atoms from a 2,2'-bipyridine ligand and two O atoms from the carboxyl-ate groups of two 2,2'-biphenyl-dicarboxyl-ate (2,2'-dpa) ligands. The 2,2'-dpa ligand acts as a bridge between neighbouring Ni(II) atoms, forming one-dimensional coordination polymers along [100]. The coordinated water mol-ecules form hydrogen bonds to the carboxyl-ate O atoms of 2,2'-dpa within the same coordination polymer, and one O-H⋯π inter-action is also formed to 2,2'-dpa.

| S-EPMC2959859 | biostudies-literature

Poly[[[diaqua-cobalt(II)]-bis-[μ-1,1'-(butane-1,4-di-yl)diimidazole-κN:N]] dichloride tetra-hydrate].

Project description:In the title compound, {[Co(C(10)H(14)N(4))(2)(H(2)O)(2)]Cl(2)·4H(2)O}(n), the Co(II) atom and the mid-point of the 1,1'-butane-1,4-diyl-diimidazole ligands lie on inversion centers. The Co(II) atom is six-coordinated in a slightly distorted octa-hedral environment by four N atoms from four different ligands and by two O atoms from the water mol-ecules. The Co(II) atoms are bridged by the ligands into a (4,4) net. Adjacent nets are linked to the chloride anions and uncoordinated water mol-ecules via O-H⋯Cl and O-H⋯O hydrogen bonds, generating a three-dimensional supra-molecular structure.

| S-EPMC2968895 | biostudies-literature

Poly[diaqua-di-μ(4)-citrato-trizinc(II)].

Project description:The title compound, [Zn(3)(C(6)H(5)O(7))(2)(H(2)O)(2)](n), is a polymer in which the repeating unit contains three zinc atoms, two hepta-dentate Hcit ligands (Hcit = citric acid trianion) and two coordinated water mol-ecules, only half of which are independent due to one of the metal atoms lying on a centre of symmetry. The two independent cations both exhibit an octa-hedral geometry, but the way in which they are coordinate are different; while the Zn atom in a general position is bound to three Hcit ligands and one water mol-ecule, the one at the centre of symmetry is coordinated by six O atoms from two symmetry-related Hcit ligands through the (protonated) hydroxyl and carboxyl-ate groups. The three carboxyl-ate groups coordinate to the Zn centres in three different ways, viz. chelating, bridging and a mixture of both, in an unusual coordination mode for citrate. The result is a two-dimensional structure parallel to (010), built up by a square-grid motif. Intermolecular O-H⋯O hydrogen bonds are present in the crystal structure.

| S-EPMC2960923 | biostudies-literature

catena-Poly[[diaqua-calcium(II)]-di-?-2-chloro-nicotinato].

Project description:The itle compound, [Ca(C(6)H(3)ClNO(2))(2)(H(2)O)(2)](n), contains polymeric chains extending along [100] that are generated by inversion centres. The Ca(2+) ions are bridged by 2-chloronicotinate groups and exhibit an eight-coordination by six carboxylate O atoms of four different 2-chloronicotinate ligands and two O atoms of water molecules. In the crystal structure, inter-molecular O-H?O, O-H?N and C-H?O hydrogen bonds result in the formation of a supra-molecular network structure. The ?-? contacts between the 2-chloro-nicotinate rings [centroid-centroid distances = 3.875?(3) and 3.701?(3)?Å] may further stabilize the structure.

| S-EPMC2968257 | biostudies-literature

Poly[di-μ-aqua-diaqua-di-μ(6)-malonato-cobalt(II)dipotassium(I)].

Project description:In the title complex, [CoK(2)(C(3)H(2)O(4))(2)(H(2)O)(4)](n), the Co atom is located on a position with site symmetry 2/m, the K atom and one water mol-ecule are located on a mirror plane, and the malonate and one water mol-ecule are located on a twofold rotation axis. The K(I) atom is seven-coordinated by four carboxyl-ate O atoms from four malonate ligands and by three water O atoms, forming a distorted polyhedron. The Co(II) atom is in an almost octa-hedral environment formed by four carboxyl-ate O atoms from two malonate ligands and two water O atoms. The structure consists of layers parallel to (20[Formula: see text]) built up from edge-sharing KO(7) and CoO(6) polyhedra, which are connected by O-H⋯O hydrogen bonding including water mol-ecules into a three-dimensional network.

| S-EPMC3089327 | biostudies-literature

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