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Poly[(?6-4-amino-3,5,6-trichloro-pyridine-2-carboxyl-ato)aqua-caesium].

ABSTRACT: In the structure of the title complex, [Cs(C6H2Cl3N2O2)(H2O)] n , the caesium salt of the commercial herbicide picloram, the Cs(+) cation lies on a crystallographic mirror plane, which also contains the coordinating water mol-ecule and all non-H atoms of the 4-amino-3,5,6-trichloro-picolinate anion except the carboxyl-ate O-atom donors. The irregular CsCl4O5 coordination polyhedron comprises chlorine donors from the ortho-related ring substituents of the picloramate ligand in a bidentate chelate mode, with a third chlorine bridging [Cs-Cl range 3.6052?(11)-3.7151?(11)?Å] as well as a bidentate chelate carboxyl-ate group giving sheets extending parallel to (010). A three-dimensional coordination polymer structure is generated through the carboxyl-ate group, which also bridges the sheets down [010]. Within the structure, there are intra-unit water O-H?Ocarboxyl-ate and amine N-H?Npyridine hydrogen-bonding inter-actions.

SUBMITTER: Smith G

PROVIDER: S-EPMC3588279 | biostudies-literature | 2013 Jan

REPOSITORIES: biostudies-literature

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Poly[[penta-aqua-(?(4)-pyridine-2,4,6-tri-carboxyl-ato)(?(3)-pyridine-2,4,6-tri-carboxyl-ato)diterbium(III)] mono-hydrate].

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Poly[[penta-aqua-(?(4)-pyridine-2,4,6-tri-carboxyl-ato)(?(3)-pyridine-2,4,6-tri-carboxyl-ato)disamarium(III)] mono-hydrate].

Project description:The asymmetric unit of the title compound, {[Sm(2)(C(8)H(2)NO(6))(2)(H(2)O)(5)]·H(2)O}(n), contains two independent Sm(III) ions, two pyridine-2,4,6-tricarboxyl-ate (ptc) ligands, five aqua ligands and one lattice water mol-ecule. One Sm(III) ion is nine-coordinated by one N and five O atoms from the three ptc ligands and three aqua ligands in a distorted monocapped square antiprismatic geometry, and the other is eight-coordinated by one N and five O atoms from three ptc ligands and two aqua ligands in a 4,4'-bicapped trigonal anti-prismatic geometry. The ptc ligands brigde the Sm(III) ions into a three-dimensional polymeric framework. Extensive O-H?O hydrogen bonding is observed in the crystal structure.

| S-EPMC3297243 | biostudies-literature

Crystal structure of poly[[di-μ2-aqua-aqua-sodium] 4-amino-3,5,6-tri-chloro-pyridine-2-carboxyl-ate trihydrate], the sodium salt of the herbicide picloram.

Project description:In the structure of the title complex, {[Na(H2O)3](C6H2Cl3N2O2)·3H2O} n , the sodium salt of the herbicide picloram, the cation adopts a polymeric chain structure, based on μ2-aqua-bridged NaO5 trigonal-bipyramidal complex units which have, in addition, a singly bonded water mol-ecule. Each of the bridges within the chain, which extends parallel to the a axis, is centrosymmetric, with Na⋯Na separations of 3.4807 (16) and 3.5109 (16) Å. In the crystal, there are three water mol-ecules of solvation and these, as well as the coordinating water mol-ecules and the amino group of the 4-amino-3,5,6-tri-chloro-picolinate anion, are involved in extensive inter-species hydrogen-bonding inter-actions with carboxyl and water O atoms, as well as the pyridine N atom. Among these associations is a centrosymmetric cyclic tetra-water R 4 (4)(8) motif, resulting in an overall three-dimensional structure.

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Project description:In the title complex, [Zn(C(10)H(12)NO(2))(2)(H(2)O)]·H(2)O, the Zn(II) ion is coordinated by two N and two O atoms from two 5-n-butyl-pyridine-2-carboxyl-ato ligands and one O atom from a water mol-ecule in a distorted square-pyramidal geometry. In the crystal, inter-molecular O-H?O hydrogen bonds link mol-ecules into a two-dimensional supramolecular structure parallel to (001).

| S-EPMC3151896 | biostudies-literature

Poly[(?(6)-6-oxidopyridinium-2-carboxyl-ato)caesium].

Project description:The asymmetric unit of the polymeric title salt, [Cs(C(6)H(4)NO(3))](n), comprises a Cs(+) cation and a 6-oxidopyridinium-2-carboxyl-ate anion. The Cs(+) cation is six-coordinated by O atoms derived from two oxido and four carboxyl-ate O atoms; each O atom in the anion bridges two Cs(+) cations. In the crystal, inter-molecular N-H?O hydrogen bonding is present and contributes to the stability of the three-dimensional network generated by the bridging O atoms.

| S-EPMC3200864 | biostudies-other

Poly[?(2)-aqua-?(2)-(pyrazine-2-carboxyl-ato)-lithium].

Project description:The structure of the title compound, [Li(C(5)H(3)N(2)O(2))(H(2)O)](n), contains an Li(I) ion with a distorted trigonal-bipyramidal coordination environment involving the N and O atoms of pyrazine-2-carboxyl-ate ligands with a bridging carboxyl-ate group, and two aqua O atoms also in a bridging mode. The symmetry-related Li(I) ions bridged by a carboxyl-ate O atom and a coordinating water O atom form an Li(2)O(2) unit with an Li?Li distance of 3.052?(4)?Å, which generates mol-ecular ribbons propagating in the c-axis direction. The ribbons are held together by a network of O-H?O hydrogen bonds in which the coordinating water mol-ecules act as donors and the carboxyl-ate O atoms as acceptors.

| S-EPMC3393196 | biostudies-literature

Poly[[aqua-bis-[?(2)-6-(pyridine-3-car-box-amido)-naphthalene-2-carboxyl-ato]copper(II)] dihydrate].

Project description:The title compound, {[Cu(C(17)H(11)N(2)O(3))(2)(H(2)O)]·2H(2)O}(n), is a two-dimensional polymer. The Cu(2+) ion lies on the crystallographic twofold axis. The coordination sphere of the Cu(2+) ion can be described as a distorted square pyramid. All of the H atoms in the amide group and lattice water mol-ecules participate in O-H?O or N-H?O hydrogen bonding to strengthen the two-dimensioal framework of the polymer.

| S-EPMC3515157 | biostudies-literature

Poly[?-aqua-aqua-(?-benzene-1,2,4,5-tetra-carboxyl-ato)gadolinate(III)potassium(I)].

Project description:In the title compound, [KGd(C(10)H(2)O(8))(H(2)O)(2)](n), the Gd(3+) ion is nine-coordinated by eight O atoms from five individual benzene-1,2,4,5-tetra-carboxyl-ate (btec) ligands and one water mol-ecule, and the K(+) ion is eight-coordinated by six O atoms from five individual btec ligands and two water mol-ecules. In the crystal, the btec half-mol-ecules are completed by crystallographic inversion symmetry. GdO(9) and KO(8) polyhedra are connected, forming layers in the ab plane, which are further inter-connected by ?(8)- or ?(12)-bridging btec ligands, forming a three-dimensional structure.

| S-EPMC3120476 | biostudies-literature

Poly[μ(2)-aqua-aqua-μ(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 π-π 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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