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Catena-Poly[[diaqua-manganese(II)]-?-pyridine-2,4,6-tricarboxyl-ato-?N,O,O:O,O].

ABSTRACT: In the title compound, [Mn(C(8)H(2)NO(6))(H(2)O)(2)](n), each pyridine-2,4,6-tricarboxyl-ate (tpc) ligand bridges two Mn(II) ions with the formation of polymeric chains located on a twofold rotation axis. Each Mn(II) ion is coordinated by two O and one N atoms from one tpc ligand, two O atoms from another ligand and two water mol-ecules in a distorted penta-gonal-bipyramidal geometry. The Mn-N [2.243?(2)?Å] and Mn-O [2.206?(2)-2.3123?(16)?Å] bond lengths are normal. The coordinated water mol-ecules link neighbouring polymeric chains via O-H?O hydrogen bonds into a two-dimensional framework parallel to the bc plane.

SUBMITTER: Fu DW

PROVIDER: S-EPMC2919291 | biostudies-literature | 2007 Dec

REPOSITORIES: biostudies-literature

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catena-Poly[[diaqua-manganese(II)]-μ-pyridine-2,4,6-tricarboxyl-ato-κN,O,O:O,O].

Fu Da-Wei DW Xu Hai-Jun HJ

Acta crystallographica. Section E, Structure reports online 20071206 Pt 1

In the title compound, [Mn(C(8)H(2)NO(6))(H(2)O)(2)](n), each pyridine-2,4,6-tricarboxyl-ate (tpc) ligand bridges two Mn(II) ions with the formation of polymeric chains located on a twofold rotation axis. Each Mn(II) ion is coordinated by two O and one N atoms from one tpc ligand, two O atoms from another ligand and two water mol-ecules in a distorted penta-gonal-bipyramidal geometry. The Mn-N [2.243 (2) Å] and Mn-O [2.206 (2)-2.3123 (16) Å] bond lengths are normal. The coordinated water mol-ecu ...[more]

PMID: 21200609

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Poly[?(3)-hydroxido-?-(pyridine-2,4,6-tricarboxyl-ato)-dilead(II)].

Project description:The asymmetric unit of the title coordination polymer, [Pb(2)(C(8)H(2)NO(6))(OH)](n), contains two crystallographically independent Pb(II) ions, one pyridine-2,4,6-tricarboxyl-ate (ptc) trianion and one hydroxide anion. One of the Pb(II) atoms is coordinated by one pyridine N and four carboxyl-ate O atoms from the ptc trianion and a hydroxide O atom in a distorted octa-hedral geometry. The other Pb(II) atom is five-coordinated by three carboxyl-ate O atoms and two hydroxide O atoms in a distorted tetra-gonal-pyramidal geometry. Four neighbouring Pb(II) atoms are bridged through two ?(3)-hydroxide ligands, forming the centrosymmetric Pb(4)(OH)(2) core. The three-dimensional structure is further achieved through bridging carboxyl-ate groups. There are also O-H?O hydrogen bonds between the hydroxide ligand and the carboxyl-ate group.

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catena-Poly[[[diaqua-manganese(II)]-?(3)-pyridine-2,3-dicarboxyl-ato-?N,O:O:O] dihydrate].

Project description:In the title coordination polymer, {[Mn(C(7)H(3)NO(4))(H(2)O)(2)]·2H(2)O}(n), the Mn(II) ion is coordinated in a distorted octahedral environment by the O atoms of two water mol-ecules, one N and one O atoms of the chelating pyridine-2,3-dicarboxyl-ate (PDC) dianion, and two axial bridging carboxyl-ate O atoms from two adjacent PDC ligands. The fully deprotonated PDC anion acts a ?(3)-bridging ligand, establishing a chain structure along the a axis. These polymeric chains are connected into a three-dimensional framework via several inter-molecular O-H?O hydrogen bonds.

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Poly[[triaqua-(?(3)-pyridine-2,4,6-tricarboxyl-ato)terbium(III)] monohydrate].

Project description:The asymmetric unit of the title compound, {[Tb(C(8)H(2)NO(6))(H(2)O)(3)]·H(2)O}(n), contains one Tb(III) ion, one pyridine-2,4,6-tricarboxyl-ate (ptc) anion, three aqua ligands and one lattice water mol-ecule. The Tb(III) ion is nine coordinated by one N and five O atoms from three ptc ligands and by three O atoms from the three aqua ligands in a distorted bicapped trigonal-prismatic geometry. The ptc ligands bridge the Tb(III) ions into a two-dimensional polymeric framework parallel to (100). An extensive O-H?O hydrogen-bonding network consolidates the crystal packing.

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catena-Poly[[diaqua-manganese(II)]-?-7-oxabicyclo-[2.2.1]heptane-2,3-dicarboxyl-ato].

Project description:In the title polymer, [Mn(C(8)H(8)O(5))(H(2)O)(2)](n), the Mn(II) atom is in a distorted octa-hedral coordination mode, binding to the bridging O atom of the bicyclo-heptane unit, two O atoms from corresponding carboxyl-ate groups, one carboxyl-ate O atom from a symmetry-related bridging ligand and two water O atoms. This arrangement leads to the formation of polymeric chains propagating parallel to [001]. The crystal structure is stabilized by several O-H?O hydrogen-bonding inter-actions involving the coordinated water mol-ecules as donors and the carboxyl-ate O atoms as acceptors.

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catena-Poly[[diaqua-manganese(II)]-di-?-pyridine-3-sulfonato-?N:O;?O:N].

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catena-Poly[[[diaqua-iron(II)]-μ-pyridine-2,5-dicarboxyl-ato-[tetra-aqua-iron(II)]-μ-pyridine-2,5-dicarboxyl-ato] tetra-hydrate].

Project description:In the crystal structure of the title compound, {[Fe(2)(C(7)H(3)NO(4))(2)(H(2)O)(6)]·4H(2)O}(n), there are two types of coordination for the Fe(II) atoms. One Fe(II) atom is in a distorted octa-hedral N(2)O(4) environment, with two chelating rings from the pyridine-dicarboxyl-ate ligands and two O atoms from the water mol-ecules, while the other is in a distorted octa-hedral O(6) environment with two O atoms from the pyridine-dicarboxyl-ate ligands and four O atoms from the water mol-ecules. Both Fe(II) atoms lie on crystallographic centers of symmetry. The complex possesses an infinite chain structure running along the [101] direction. These chains are inter-connected by the uncoordinated water mol-ecules through O-H⋯O hydrogen bonds.

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catena-Poly[[diaqua-dibromidoman-ganese(III)]-?-pyridine-2-carboxyl-ato].

Project description:The asymmetric unit of the title compound, [MnBr(2)(C(6)H(4)NO(2))(H(2)O)(2)](n), contains one monomeric unit of the neutral linear coordination polymer. The Mn(3+) ions are bridged by anionic pyridine-2-carboxyl-ate (pic) ligands, thereby forming a chain-like structure along the c axis, and are six-coordinated in a distorted octa-hedral environment by two O atoms of the two different carboxyl-ate groups, two O atoms of two water mol-ecules and two Br atoms. The complex displays inter-molecular O-H?Br, O-H?N, O-H?O, C-H?O and C-H?Br hydrogen bonding. There may also be inter-molecular ?-? inter-actions between adjacent pyridine rings, with a centroid-centroid distance of 3.993?(8)?Å.

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catena-Poly[diimidazolium [bis-(?-pyridine-2,5-dicarboxyl-ato)bis-[diaqua-praseodymate(III)]]-bis-(?-pyridine-2,5-dicarboxyl-ato)].

Project description:The title compound {(C(3)H(5)N(2))(2)[Pr(2)(C(7)H(3)NO(4))(4)(H(2)O)(4)]}(n), has a chain structure featuring a dimeric unit consisting of two Pr(III) atoms within a dodecahedral environment. Each of the metal cations is coordinated by two N atoms and two O atoms from two pyridine-2,5-dicarboxyl-ate ligands, two O atoms from another two pyridine-2,5-dicarboxyl-ate ligands and two water O atoms. The Pr(III) ions are bridged by two ligands along the c axis, forming the dimeric unit, and these are connected by four ligands along the b axis, forming a chain. N-H?O and O-H?O hydrogen bonds are found in the structure.

| S-EPMC3089278 | biostudies-literature

catena-Poly[[[aqua-(5-nitro-benzene-1,2,3-tricarboxyl-ato-?O)nickel(II)]-di-?-aqua-[diaqua-sodium]-di-?-aqua] tetra-hydrate].

Project description:In the title complex, {[NaNi(C(9)H(2)NO(8))(H(2)O)(7)]·4H(2)O}(n), the Ni(II) atom has a distorted octa-hedral coordination, defined by five O atoms from five water mol-ecules and one O atom from one 5-nitro-benzene-1,2,3-tricarboxyl-ate ligand. The Na cation is coordinated by six water O atoms in an irregular trigonal-prismatic geometry. There are seven coordinated water mol-ecules in the asymmetic unit. The Ni and Na atoms are linked by water bridges, forming infinite chains, which are connected by strong O-H?O hydrogen bonds involving the coordinated and uncoordinated water mol-ecules into a three-dimensional network.

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catena-Poly[hemi(hexane-1,6-diammonium) [[aqua-dibromido-manganese(II)]-μ-pyridine-2-carboxyl-ato]].

Project description:The asymmetric unit of the title compound, {(C(6)H(18)N(2))(0.5)[MnBr(2)(C(6)H(4)NO(2))(H(2)O)]}(n), contains the repeat unit of the complex anion and one-half of a hexane-1,6-diammonium cation that is located on a twofold rotation axis. In the anionic polymer, the Mn(2+) ions are bridged by the pyridine-carboxyl-ate (pic) anion ligand, forming a chain structure along the c axis. The Mn(2+) ion is six-coordinated in a distorted octa-hedral environment by one N atom of the pyridine ring, two O atoms of the two carboxyl-ate groups, one O atom of the water mol-ecule and two Br atoms. The compound displays inter-molecular N-H⋯O, N-H⋯Br, O-H⋯Br and O-H⋯O hydrogen bonding. There may also be inter-molecular π-π inter-actions between adjacent pyridine rings, with a centroid-centroid distance of 3.992 (4) Å.

| S-EPMC2969818 | biostudies-literature

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