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Poly[?(2)-aqua-aqua-?(4)-pyridine-2,4-dicarboxyl-ato-strontium].

ABSTRACT: In the title polymeric complex, [Sr(C(7)H(3)NO(4))(H(2)O)(2)](n), the Sr(II) atom is eight-coordinated by four O atoms and one N atom of four pyridine-2,4-dicarboxyl-ate (py-2,4-dc) ligands and three O atoms of three coordinated water mol-ecules in a dodeca-hedral geometry. These units are connected via the carboxyl-ate O atoms and water mol-ecules, building polymeric layers parallel to (100). In the crystal structure, non-covalent inter-actions consisting of O-H?O hydrogen bonds and ?-? stacking inter-actions [centroid-centroid distances = 3.862?(17) and 3.749?(17)?Å] connect the various components, forming a three-dimensional structure.

SUBMITTER: Soleimannejad J

PROVIDER: S-EPMC2977487 | biostudies-literature | 2009 Jul

REPOSITORIES: biostudies-literature

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Poly[μ(2)-aqua-aqua-μ(4)-pyridine-2,4-dicarboxyl-ato-strontium].

Soleimannejad Janet J Mohammadzadeh Yaghoub Y Aghabozorg Hossein H Derikvand Zohreh Z

Acta crystallographica. Section E, Structure reports online 20090715 Pt 8

In the title polymeric complex, [Sr(C(7)H(3)NO(4))(H(2)O)(2)](n), the Sr(II) atom is eight-coordinated by four O atoms and one N atom of four pyridine-2,4-dicarboxyl-ate (py-2,4-dc) ligands and three O atoms of three coordinated water mol-ecules in a dodeca-hedral geometry. These units are connected via the carboxyl-ate O atoms and water mol-ecules, building polymeric layers parallel to (100). In the crystal structure, non-covalent inter-actions consisting of O-H⋯O hydrogen bonds and π-π stackin ...[more]

PMID: 21583378

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Poly[tetra-aqua-μ(3)-pyridine-3,5-dicarboxyl-ato-strontium(II)].

Project description:The reaction of strontium(II) nitrate with the proton-transfer compound (pdaH(2))(py-3,5-dc)·H(2)O (where pda = propane-1,3-diamine and py-3,5-dcH(2) = pyridine-3,5-dicarboxylic acid) leads to the formation of the title polymeric compound, [Sr(C(7)H(3)NO(4))(H(2)O)(4)](n). The propane-1,3-diaminium cation is not incorporated in this crystal structure. The Sr(II) atom lies on an inversion centre and is eight-coordinated by four O atoms from three py-3,5-dc ligands and four O atoms from four coordinated water mol-ecules. The coordination polyhedron of the Sr(II) atom is a distorted dodeca-hedron. These binuclear units are connected via the carboxyl-ate O atoms to build a one-dimensional polymeric chain. In the crystal structure, non-covalant inter-actions consisting of hydrogen bonds (X-H⋯O, with X = O and C) and π-π stacking inter-actions [3.4604 (19) Å] connect the various components to form a supra-molecular structure.

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Project description:In the polymeric title compound, [Ba(C(7)H(3)NO(4))(H(2)O)(3)](n), the Ba(II) ion is ten-coordinated in an NO(9) environment by one N atom and three O atoms from three pyridine-2,4-dicarboxyl-ate (pydc) ligands and six water mol-ecules. The μ(3)-pydc ligands and the bridging water mol-ecules connect the Ba atoms into a layer parallel to (100). The crystal packing is stabilized by O-H⋯O and C-H⋯O hydrogen bonds.

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Poly[[tetra-aqua-bis-(μ(3)-pyridine-2,6-dicarboxyl-ato)(μ(2)-pyridine-2,6-dicarboxyl-ato)dilanthanum(III)] dihydrate].

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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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Poly[piperazinediium [[aqua-bismuth-ate(III)]-di-μ-pyridine-2,6-dicarboxyl-ato-bis-muthate(III)-di-μ-pyridine-2,6-dicarboxyl-ato] monohydrate].

Project description:The title compound, {(C(4)H(12)N(2))[Bi(2)(C(7)H(3)NO(4))(4)(H(2)O)]·H(2)O}(n) or {(pipzH(2))[Bi(2)(pydc)(4)(H(2)O)]·H(2)O}(n), where pydcH(2) is pyridine-2,6-dicarboxylic acid and pipz is piperazine, was obtained by reaction of Bi(NO(3))(3)·5H(2)O with (pipzH(2))(pydc-H)(2)·3H(2)O in a 1:2 molar ratio in aqueous solution. There are two independent Bi(III) atoms in the structure, one of which is eight-coordinate with a distorted bicapped trigonal-prismatic geometry, and another which is nine-coordinate with a distorted tricapped trigonal-prismatic geometry. The carboxyl-ate groups of the (pydc)(2-) ligands link dinuclear [Bi(2)(C(7)H(3)NO(4))(4)(H(2)O)](2-) units into one-dimensional coordin-ation polymers. The pipzH(2) (2+) cations (site symmetry ) and non-coordinated water mol-ecules lie between these polymers, forming N-H⋯O and O-H⋯O hydrogen bonds to the O atoms of the carboxylate groups.

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Poly[aqua-(dimethyl sulfoxide)(μ(4)-pyridine-2,5-dicarboxyl-ato)calcium(II)].

Project description:In the polymeric title compound, [Ca(C(7)H(3)NO(4))(H(2)O)(C(2)H(6)OS)](n), the Ca(II) ion is coordinated in a distorted penta-gonal-bipyramidal CdNO(6) geometry. The crystal packing is stabilized by O-H⋯O hydrogen bonds and π-π stacking inter-actions between the aromatic rings of pyridine-2,5-dicarb-oxy-late with centroid-centroid distances of 3.6166 (13) Å.

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Poly[diaqua-(?(5)-pyridine-3,5-dicarboxyl-ato)strontium].

Project description:In the structure of the title compound, [Sr(C(7)H(3)NO(4))(H(2)O)(2)](n), the Sr(II) cation is eight-coordinated in form of a distorted dodeca-hedron by two water O atoms and by five O atoms and one N atom from five pyridine-3,5-dicarboxyl-ate anions. The bridging mode of the anions leads to the formation of a layered network parallel to (100). O-H?O hydrogen bonding between the coordinating water mol-ecules and the carboxyl-ate groups of adjacent layers consolidates the crystal packing. Weak C-H?O inter-actions are also observed.

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Poly[hexa-aqua-hexa-kis-(?-pyridine-2,4-dicarboxyl-ato)tricopper(II)dieuropium(III)].

Project description:The asymmetric unit of the title heterometallic coordination polymer, [Cu(3)Eu(2)(C(7)H(3)NO(4))(6)(H(2)O)(6)](n), contains one Eu(III) and two Cu(II) atoms, three pyridine-2,4-dicarboxylate (pdc)(2-) anions and three water molecules. One Cu(II) atom is located on an inversion center and is N,O-chelated by two pdc(2-) anions in the equatorial plane and further coordinated by two carboxyl-ate O atoms from another two pdc anions in the axial positions, with an elongated octa-hedral geometry [Cu-O = 2.409?(3)?Å in the axial direction]; the other Cu atom is N,O-chelated by two pdc anions in the coordination basal plane and coordinated by a carboxyl O atom at the apical position with a distorted square-pyramidal geometry [Cu-O = 2.359?(3)?Å in the apical direction]. The Eu atom is eight-coordinated with a distorted square-anti-prismatic geometry formed by five carboxyl-ate O atoms from five pdc anions and three water mol-ecules. The carboxyl-ate anions bridge adjacent Eu and Cu atoms, forming the coordination polymer. Inter- and intra-molecular O-H?O hydrogen bonding occurs in the structure. ?-? stacking further consolidates the crystal structure, the centroid-centroid distance between parallel pyridine rings being 3.367?(2)?Å.

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Poly[?(6)-pyridine-2,4-dicarboxyl-ato-barium].

Project description:In the title complex, [Ba(C(7)H(3)NO(4))](n), the coordination geometry around the Ba(II) ion can be described as a distorted bicapped trigonal-prismatic BaNO(7) arrangement. The pyridine-2,4-dicarb-oxy-lic acid ligands exhibit a new coordination mode. Adjacent metal centers are linked by the O atoms of the pyridine-2,4-dicarb-oxy-lic acid ligands, and then form a three-dimensional supra-molecular polymeric framework.

| S-EPMC3006690 | biostudies-literature

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