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

ABSTRACT: 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.

SUBMITTER: Kim NH

PROVIDER: S-EPMC2977438 | biostudies-literature | 2009 Jul

REPOSITORIES: biostudies-literature

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

Kim Nam-Ho NH Ha Kwang K

Acta crystallographica. Section E, Structure reports online 20090725 Pt 8

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 ...[more]

PMID: 21583426

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catena-Poly[[[diaqua-thulium(III)]-μ-6-carboxy-nicotinato-μ-pyridine-2,5-di-carboxyl-ato] dihydrate].

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| S-EPMC3200950 | 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.

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Project description:The three-dimensional title coordination polymer, {[Tb(2)(C(8)H(2)NO(6))(2)(H(2)O)(5)]·H(2)O}(n), was hydro-thermally synthesized by reacting the corresponding rare-earth salt with pyridine-2,4,6-tricarb-oxy-lic acid (H(3)ptc). There are two independent Tb(III) atoms in the structure, one of which is nine-coordinated, forming a monocapped NO(8) square-anti-prism and the other is eight-coordinated exhibiting a 4,4-bicapped NO(7) trigonal-prismatic environment. The complex units are inter-connected through the ptc(3-) anions acting in different coordination modes, resulting in a three-dimensional coordin-ation polymer. The crystal structure features extensive O-H?O hydrogen bonds.

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