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Poly[?(2)-aqua-aqua-?(5)-naphthalene-2,7-disulfonato-strontium].

ABSTRACT: In the crystal structure of the polymeric title compound, [Sr(C(10)H(6)O(6)S(2))(H(2)O)(2)](n), the naphthalene-2,7-disulfonate dianion uses one -SO(3) unit to bind to two Sr(II) cations and the other -SO(3) unit to bind to three Sr(II) cations; of the two coordinated water mol-ecules, one is monodentate to one Sr(II) cation, whereas the other bridges two Sr(II) cations. The ?(5)-bridging mode of the dianon and the ?(2)-bridging mode of the water mol-ecule generate a polymeric three-dimensional network which is consolidated by O-H?O hydrogen bonds. The Sr(II) cation exists in an undefined eight-coordinate environment.

SUBMITTER: Gao S

PROVIDER: S-EPMC3238698 | biostudies-literature | 2011 Dec

REPOSITORIES: biostudies-literature

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Poly[μ(2)-aqua-aqua-μ(5)-naphthalene-2,7-disulfonato-strontium].

Gao Shan S Ng Seik Weng SW

Acta crystallographica. Section E, Structure reports online 20111119 Pt 12

In the crystal structure of the polymeric title compound, [Sr(C(10)H(6)O(6)S(2))(H(2)O)(2)](n), the naphthalene-2,7-disulfonate dianion uses one -SO(3) unit to bind to two Sr(II) cations and the other -SO(3) unit to bind to three Sr(II) cations; of the two coordinated water mol-ecules, one is monodentate to one Sr(II) cation, whereas the other bridges two Sr(II) cations. The μ(5)-bridging mode of the dianon and the μ(2)-bridging mode of the water mol-ecule generate a polymeric three-dimensional ...[more]

PMID: 22199575

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Poly[[tetra-aqua-(?(3)-naphthalene-1,6-disulfonato-?O:O,O:O)strontium(II)] monohydrate].

Project description:In the crystal structure of the polymeric title compound, {[Sr(C(10)H(6)O(6)S(2))(H(2)O)(4)]·H(2)O}(n), the naphthalene-1,6-disulfonate dianion uses one -SO(3) unit to O,O'-chelate to an Sr(II) cation and its third O atom to bind to another Sr(II) cation. The other -SO(3) unit binds to yet another Sr(II) atom. The four coordinated water mol-ecules are monodentate but one is disordered over two positions in a 1:1 ratio. The ?(3)-bonding mode of the dianion generates a polymeric three-dimensional network; the network is consolidated by O-H?O hydrogen bonds. The Sr(II) cation exists in an undefined eight-coordinate environment.

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Poly[?-aqua-?(4)-terephthalato-strontium].

Project description:In the title compound, [Sr(C(8)H(4)O(4))(H(2)O)](n), the Sr(II) atom exhibits coordination number eight, with six O atoms from four carboxylate groups (two bidentate and two monodentate) of terephthalate ligands and two water O atoms. The SrO(8) polyhedra are linked into inorganic chains by sharing three coplanar O atoms. These inorganic chains are extended along the b axis to form layers in the ab plane by O-C-O linking. Parallel layers are connected by terephthalic groups, forming a three-dimensional framework. O-H?O hydrogen-bonding inter-actions are observed.

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Project description:In the polymeric title complex, [Pb(2)(CH(3)CO(2))(2)(C(10)H(6)O(6)S(2))](n), the acetate anion functions in a chelating mode and both O atoms also coordinate to adjacent Pb(II) atoms. The naphthalene-1,5-disulfonate dianion, which lies on a center of inversion, is connected to four Pb(II) atoms. The bridging modes of the monoanion and dianion give rise to a three-dimensional coordination polymer. The Pb(II) atom is eight-coordinate in the form of an undefined coordination polyhedron.

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Poly[aqua-(?(11)-4,6-dihy-droxy-benzene-1,3-disulfonato)-dipotassium].

Project description:In the title salt, [K(2)(C(6)H(4)O(8)S(2))(H(2)O)](n), both K(+) ions exhibit a seven-coordination with K-O bond lengths in the range 2.6600?(14) to 3.0522?(16)?Å. One K(+) ion is coordinated by seven O atoms from the sulfonate and phenolic hy-droxy groups of six 4,6-dihy-droxy-benzene-1,3-disulfonate (L(2-)) anions while the other K(+) ion is coordinated by six O atoms from the sulfonate and phenolic hy-droxy groups of five L(2-) anions and one water O atom. The L(2-) anion exhibits chelating-bridging multidentate coordination to potassium, resulting in the formation of a cross-linked three-dimensional network.

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

Project description: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.

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Poly[penta-?-aqua-?(6)-methyl-ene-disulfonato-?(5)-methyl-enedisulfonato-tetra-sodium(I)].

Project description:The title compound, [Na(4)(CH(2)O(6)S(2))(2)(H(2)O)(5)](n), was crystallized from an aqueous solution. The sodium ions are surrounded and bridged by O atoms from coordinated water mol-ecules and sulfonate ions in a three-dimensional neutral network. The crystal structure is also stabilized by an intricate system of hydrogen bonds.

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Poly[?-aqua-aqua-?4-naphthalene-1,8-dicarboxyl-ato-barium]: a layer structure.

Project description:The title compound, [Ba(C12H6O4)(H2O)2] n , is represented by a layer-like structure built of BaO8 polyhedra. The asymmetric unit contains a Ba(2+) ion, half a coordinating water mol-ecule and half a ?4-bridging naphthalene-1,8-dicarboxyl-ate (1,8-nap) ligand, the whole structure being generated by twofold rotational symmetry. The carboxyl-ate groups of the 1,8-nap ligands act as bridges linking four Ba(2+) ions, while each Ba(2+) ion is eight-coordinated by O atoms from four 1,8-nap ligands and two coordinating water mol-ecules. In the crystal, there are O-H?O hydrogen bonds involving the water mol-ecules and carboxyl-ate O atoms in the BaO8 polyhedra. Each BaO8 polyhedron is connected via corner-sharing water O atoms or edge-sharing ligand O atoms, forming a sheet parallel to the bc plane. These sheets stack along the a-axis direction and are connected via van der Waals forces only. The naphthalene groups protrude above and below the layers of the BaO8 polyhedra and there are voids of ca 208?Å(3) bounded by these groups. No residual electron density was found in this region. The crystal studied was twinned by pseudo-merohedry, with a refined twin component ratio of 0.5261?(1):0.4739?(1).

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Poly[?(2)-aqua-?(4)-naphthalene-1,8-dicarboxyl-ato-manganese(II)].

Project description:The asymmetric unit of the title complex, [Mn(C(12)H(6)O(4))(H(2)O)](n), contains one Mn(II) ion, one 1,8-naphthalene-dicarboxyl-ate (1,8-NDC) ligand and one water mol-ecule. The Mn(II) ion is six-coordinated within a distorted octa-hedral coordination geometry, in which the equatorial sites are occupied by four carboxyl-ate O atoms from four different 1,8-NDC ligands, while the axial positions are occupied by two O atoms of two coordinated water mol-ecules. Adjacent Mn(II) centres are bridged by one coordinated water and two carboxyl-ate groups in a syn-syn mode to form infinite chains along the b axis, which are further cross-linked by the naphthalene spacers of the 1,8-NDC ligands to produce a two-dimensional extended network.

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Poly[?6-(naphthalene-2,6-di-carboxyl-ato)-bis-(aqua-lithium)].

Project description:The title compound, [Li2(C12H6O4)(H2O)2] n , crystallizes with one half of the molecular entities in the asymmetric unit. The second half is gererated by inversion symmetry. The crystal structure has a layered arrangement built from distorted edge-sharing LiO3(OH)2 tetra-hedra parallel to (100), with naphthalenedi-carboxyl-ate bridging the LiO3(OH)2 layers along the [100] direction. Hydrogen bonding between the water molecule and adjacent carboxylate groups consolidates the packing.

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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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