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Poly[disodium [diaqua-tri-μ(2)-oxalato-dimagnesium(II)]].

ABSTRACT: The title compound, {Na(2)[Mg(2)(C(2)O(4))(3)(H(2)O)(2)]}(n), is isotypic with its Co analogue. There are two crystallographically independent oxalate groups in the asymmetric unit, one lying on an inversion center and the other on a general position. Mg(2+) ions are ligated by H(2)O mol-ecules and bridged by tri- and tetra-dentate oxalate ligands, forming ladder-like double chains that are held together via O-H⋯O hydrogen bonds, with Na(+) cations located between the chains to balance the charge.

SUBMITTER: Chen XA

PROVIDER: S-EPMC2961912 | biostudies-literature |

REPOSITORIES: biostudies-literature

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Poly[diaqua-μ(4)-oxalato-di-μ(6)-phosphato-tetra-cobalt(II)].

Project description:In the structure of the title compound, [Co(4)(C(2)O(4))(PO(4))(2)(H(2)O)(2)](n), there are layers composed of the phosphate anions and two independent Co(II) cations. These layers are parallel to (001) and are bridged by the oxalate anions that are situated in special positions on centres of symmetry. One independent Co atom has an octa-hedral coordination, while the second independent Co atom is coordinated in a trigonal-bipyramidal coordination that includes the water mol-ecule. The crystal packing is stabilized by O-H⋯O hydrogen bonds between the coordinated water mol-ecules and oxalate O atoms.

| S-EPMC2960387 | biostudies-literature

Poly[[diaqua-hemi-μ(4)-oxalato-μ(2)-oxalato-praseodymium(III)] monohydrate].

Project description:In the title complex, {[Pr(C(2)O(4))(1.5)(H(2)O)(2)]·H(2)O}(n), the Pr(III) ion, which lies on a crystallographic inversion centre, is coordinated by seven O atoms from four oxalate ligands and two O atoms from two water ligands; further Pr-O coordination from tetra-dentate oxalate ligands forms a three-dimensional structure. The compound crystallized as a monohydrate, the water mol-ecule occupying space in small voids and being secured by O-H⋯O hydrogen bonding as an acceptor from ligand water H atoms and as a donor to oxalate O-acceptor sites.

| S-EPMC2969896 | biostudies-literature

Poly[diaqua-μ(2)-oxalato-di-μ(2)-pyrimidine-2-carboxyl-ato-dimanganese(II)].

Project description:In the title compound, [Mn(2)(C(2)O(4))(C(5)H(3)N(2)O(2))(2)(H(2)O)(2)](n), the Mn(II) atom exhibits a distorted octa-hedral coordination geometry, with the centrosymmetric oxalate anion and the monoanionic pyrimidine-2-carboxyl-ate ligands generating a two-dimensional honeycomb network with a (6,3)-topology.

| S-EPMC2961100 | biostudies-literature

Poly[diaqua-μ(2)-isonicotinato-μ(2)-oxalato-terbium(III)].

Project description:In the crystal structure of the title complex, [Tb(C(6)H(4)NO(2))(C(2)O(4))(H(2)O)(2)](n), the Tb(III) cation is coordinated by four O atoms from two oxalate ligands, two O atoms from two isonicotinate ligands and two O atoms from water mol-ecules within a distorted square-anti-prismatic coordination. The Tb(III) cation, the isonicotinate anion and the two crystallographically independent water mol-ecules occupy general positions, whereas one of the two crystallographically independent oxalate anions is located on a center of inversion, and the second oxalate anion is located on a twofold rotation axis. The Tb(III) cations are linked by the oxalate and isonicotinate anions into layers, which are connected via inter-molecular hydrogen-bonding and π-π stacking [with centroid-to-centroid distances of 3.509 (2) and 3.343 (3) Å] inter-actions into a three-dimensional network.

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Poly[diaqua-μ(2)-isonicotinato-μ(2)-oxalato-terbium(III)].

Project description:In the crystal structure of the title complex, [Tb(C(6)H(4)NO(2))(C(2)O(4))(H(2)O)(2)](n), the Tb(III) ion is coordinated by two O atoms from two isonicotinate (inic) anions, four O atoms of two oxalate anions, and two water mol-ecules, displaying a distorted square-antiprismatic geometry. The Tb(III) ion, the inic anion and the water mol-ecules occupy general positions. One of the two crystallographically independent oxalate anions is located on a center of inversion, whereas the second is located on the twofold rotation axis. The carboxyl-ate groups of the inic and oxalate anions link the terbium metal centres into layers. These layers are connected by O-H⋯O and N-H⋯O hydrogen bonding into a three-dimensional network.

| S-EPMC2968019 | biostudies-literature

Poly[diaqua-μ(2)-oxalato-di-μ(4)-terephthalato-diytterbium(III)].

Project description:The crystal structure of the title complex, [Yb(2)(C(8)H(4)O(4))(2)(C(2)O(4))(H(2)O)(2)](n), features an extended three-dimensional framework made up of Yb(3+) ions coordinated by terephthalate ligands, oxalate ligands and water mol-ecules. The Yb(3+) ion has a distorted square-anti-prismatic coordination formed by one aqua ligand, two O atoms from an oxalate ligand and five O atoms belonging to four terephthalate anions. Two symmetry-independent terephthalate anions, as well as the oxalate anion, occupy special positions on inversion centers. The water molecule participates in O-H⋯O hydrogen bonding with both terephthalate anions.

| S-EPMC3008045 | biostudies-literature

Poly[diaqua-μ(2)-oxalato-di-μ(4)-succinato-diyttrium(III)].

Project description:In the title compound, [Y(2)(C(4)H(4)O(4))(2)(C(2)O(4))(H(2)O)(2)](n), the flexible succinate anion assumes a gauche conformation and bridges the eight-coordinated Y atoms, generating two-dimensional layers parallel to (010). The coordination polymer layers are linked into a three-dimensional framework by the rigid oxalate ligands. The oxalate ions are located on a center of inversion. Inter-molecular O-H⋯O hydrogen bonds help to stabilize the crystal structure.

| S-EPMC2969986 | biostudies-literature

Poly[diaqua-μ-oxalato-μ-pyrazine-2-carbox-yl-ato-lanthanum(III)].

Project description:In the title complex, [La(C(5)H(3)N(2)O(2))(C(2)O(4))(H(2)O)(2)](n), the La(III) ion is coordinated by one N and three O atoms from two pyrazine-2-carboxylate ligands, by four O atoms from two oxalate ligands and by two O atoms of two water molecules, displaying a distorted bicapped square-anti-prismatic geometry. The carboxyl-ate groups of pyrazine-2-carboxyl-ate and oxalate ligands link the lanthanum metal centres, forming layers parallel to (10). The layers are further connected by inter-molecular O-H⋯O and N-H⋯O hydrogen-bonding inter-actions, forming a three-dimensional supra-molecular network.

| S-EPMC2967913 | biostudies-literature

Poly[diaqua-(μ-oxalato)(μ-2-oxidopyridinium-3-carboxyl-ato)lanthanum(III)].

Project description:In the title complex, [La(C(6)H(4)NO(3))(C(2)O(4))(H(2)O)(2)](n), the La(III) ion is coordinated by eight O atoms from two 2-oxido-pyridinium-3-carboxyl-ate ligands, two oxalate ligands and two water mol-ecules in a distorted bicapped square-anti-prismatic geometry. The carboxyl-ate groups link adjacent La(III) ions, forming two-dimensional layers that are further linked by N-H⋯O and O-H⋯O hydrogen bonds.

| S-EPMC2969809 | biostudies-literature

catena-Poly[[(1,10-phenanthroline)copper(II)]-μ-oxalato].

Project description:In the title coordination polymer, [Cu(C(2)O(4))(C(12)H(8)N(2))](n), the Cu(II) atom is six-coordinated by four O atoms from two oxalate ligands and two N atoms from one 1,10-phenanthroline (phen) ligand in a distorted octa-hedral coordination geometry. The oxalate anions act as bis-bidentate ligands, bridging the Cu-phen units in zigzag chains extending parallel to [100]. Inter-chain C-H⋯O hydrogen bonding and π-π stacking inter-actions [centroid-centroid distance = 3.7439 (17) Å] assemble neighboring chains, forming a three-dimensional supra-molecular network.

| S-EPMC2983185 | biostudies-literature

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