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Catena-Poly[[[tetraaqua(3,5-dinitro-4-oxidopyridine N-oxide-?O)neodymium(III)]-?-oxalato-?O,O:O,O] tetrahydrate].

ABSTRACT: In the title coordination polymer, {[Nd(C(5)H(2)N(3)O(6))(C(2)O(4))(H(2)O)(4)]·4H(2)O}(n), the oxalate dianions link adjacent nine-coordinate, tricapped trigonal-prismatic Nd(III) atoms into a chain running along the b axis. The 3,5-dinitropyridin-4-oxido N-oxide ligand is formally a zwitterionic anion; the anion binds to the metal atom through the N-oxide O atom. The chains are connected into a three-dimensional network by O-H?O hydrogen bonds involving the coordinated and uncoordinated water mol-ecules.

SUBMITTER: Han YF

PROVIDER: S-EPMC3009275 | biostudies-literature | 2010 Oct

REPOSITORIES: biostudies-literature

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catena-Poly[[[tetraaqua(3,5-dinitro-4-oxidopyridine N-oxide-κO)neodymium(III)]-μ-oxalato-κO,O:O,O] tetrahydrate].

Han Yin-Feng YF Ng Seik Weng SW

Acta crystallographica. Section E, Structure reports online 20101023 Pt 11

In the title coordination polymer, {[Nd(C(5)H(2)N(3)O(6))(C(2)O(4))(H(2)O)(4)]·4H(2)O}(n), the oxalate dianions link adjacent nine-coordinate, tricapped trigonal-prismatic Nd(III) atoms into a chain running along the b axis. The 3,5-dinitropyridin-4-oxido N-oxide ligand is formally a zwitterionic anion; the anion binds to the metal atom through the N-oxide O atom. The chains are connected into a three-dimensional network by O-H⋯O hydrogen bonds involving the coordinated and uncoordinated water m ...[more]

PMID: 21588856

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Poly[aqua(?(3)-5-aza-niumylisophthalato)-(?-oxalato)neodymium(III)].

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Project description:In the title coordination polymer, {[AgNd(C(5)H(3)N(2)O(2))(2)(C(2)O(4))]·H(2)O}(n), the Nd(III) atom is coordinated in a distorted monocapped square-anti-prismatic geometry by two O and two N atoms of two N,O-bidentate pyrazine-2-carboxyl-ate (2-pzc) ligands, four O atoms of two bidentate oxalate ligands, and one O atom of a monodentate carboxyl-ate group of a 2-pzc ligand. The Ag(I) ion is coordinated in a distorted tetra-hedral geometry by two N atoms from two monodentate 2-pzc ligands, one O atom from one monodentate oxalate ligand and one O atom of a bridging carboxyl-ate group of a 2-pzc ligand. The oxalate anions link neighbouring neodymium(III) metal centres into Nd-oxalate chains, which are inter-connected by Ag(2-pyz)(2) units, forming a three-dimensional polymeric framework. Inter-molecular O-H?O and C-H?O hydrogen bonds are observed in the crystal structure.

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catena-Poly[[[tetra-aqua-neodymium(III)]-di-?-isonicotinato] chloride].

Project description:In the title complex, {[Nd(C(6)H(4)NO(2))(2)(H(2)O)(4)]Cl}(n), the Nd(III) cation is located on a twofold rotation axis and coordinated by four isonicotiniate anions and four water mol-ecules in a distorted square-anti-prismatic geometry. The carboxyl-ate groups of the isonicotinate anions bridge the Nd(III) cations, forming polymeric chains running along the c axis. The Cl(-) anion is located on a twofold rotation axis and is linked to the polymeric chains via O-H?Cl hydrogen bonding. Inter-molecular O-H?O and O-H?N hydrogen bonds are also present in the crystal structure.

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catena-Poly[bis-(?(3)-2-methyl-3,5-dinitro-benzoato)disilver(I)].

Project description:In the title coordination polymer, [Ag(2)(C(8)H(5)N(2)O(6))(2)](n), the silver ion is coordinated to three O atoms from three different anions in an approximate T-shape with one bond much longer than the other two. The polyhedral connectivity leads to [100] chains containing alternating centrosymmetric four-rings and eight-rings, with a short d(10)?d(10) Ag?Ag interaction [2.8846?(4)?Å] across the latter. The nitro groups are oriented at dihedral angles of 21.2?(5) and 64.3?(3)° with respect to the aromatic ring of the ligand. A C-H?O inter-action occurs in the crystal.

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catena-Poly[[[diaqua-cobalt(II)]-μ-(3,5-dinitro-2-oxidobenzoato)-κO,O:O-[tetra-aqua-cobalt(II)]-μ-(3,5-dinitro-2-oxidobenzoato)-κO:O,O] dihydrate].

Project description:In polymeric title compound, {[Co(2)(C(7)H(2)N(2)O(7))(2)(H(2)O)(6)]·2H(2)O}(n), obtained from the reaction of 3,5-dinitro-salicylic acid with cobalt(II) acetate, both Co(II) atoms are located on inversion centres and exhibit a distorted octahedral coordination geometry. The coordin-ation sphere about one Co(II) atom comprises four O-atom donors from two bidentate chelate (O(phenolate) and O(carbox-yl)) and bridging dianionic ligands and two water mol-ecules [Co-O range = 2.0249 (11)-2.1386 (14) Å], while that about the second Co(II) atom has four water mol-ecules and two bridging carboxyl-ate O-donor atoms [Co-O range = 2.0690 (14)-2.1364 (11) Å]. The coordinated water mol-ecules as well as the water mol-ecules of solvation give O-H⋯O water-water and water-carboxyl hydrogen-bonding inter-actions in the three-dimensional framework structure.

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