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

ABSTRACT: 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.

SUBMITTER: Kang SK

PROVIDER: S-EPMC3200864 | biostudies-other | 2011 Sep

REPOSITORIES: biostudies-other

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

Kang Sung Kwon SK Shim Yong Suk YS

Acta crystallographica. Section E, Structure reports online 20110817 Pt 9

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. ...[more]

PMID: 22064792

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

Project description: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.

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Project description:In the polymeric complex of the title compound, {[AgNi(C(5)H(3)N(2)O(2))(2)(H(2)O)(2)]NO(3)·2H(2)O}(n), the Ag(I) ion displays an angular coordination geometry with two N atoms from pyrazine-2-carboxyl-ate ligands, and the Ni(II) ion is hexa-coordinated by two O atoms from two water mol-ecules, two O and two N atoms from pyrazine-2-carboxyl-ate ligands in a distorted octa-hedral geometry. In the crystal, the Ag(I) and Ni(II) ions lie on a mirror plane and an inversion centre, respectively. The complex chains, the nitrate ions and the uncoordinated water mol-ecules are linked together through O-H?O hydrogen bonds and weak Ag?O inter-actions [2.619?(17)-2.749?(17)?Å] into a three-dimensional network.

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

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