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Diammonium diaqua-bis(methyl-enediphospho-nato-?O,O')cobaltate(II).

ABSTRACT: In the salt, (NH(4))(2)[Co(CH(4)O(6)P(2))(2)(H(2)O)(2)], the methyl-ene-diphospho-nate acts as a bidentate ligand and the Co(II) ion (site symmetry ) assumes an octa-hedral CoO(6) coordination geometry. The acid H atom of the ligand is distributed over two O atoms. In the crystal, a three-dimensional network is formed through O-H?O and N-H?O hydrogen bonds between the cations and anions.

SUBMITTER: Van der Merwe KA

PROVIDER: S-EPMC2971074 | biostudies-literature | 2009 Oct

REPOSITORIES: biostudies-literature

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Diammonium diaqua-bis(methyl-enediphospho-nato-κO,O')cobaltate(II).

Van der Merwe K A KA Visser Hendrik G HG Venter J A JA

Acta crystallographica. Section E, Structure reports online 20091017 Pt 11

In the salt, (NH(4))(2)[Co(CH(4)O(6)P(2))(2)(H(2)O)(2)], the methyl-ene-diphospho-nate acts as a bidentate ligand and the Co(II) ion (site symmetry ) assumes an octa-hedral CoO(6) coordination geometry. The acid H atom of the ligand is distributed over two O atoms. In the crystal, a three-dimensional network is formed through O-H⋯O and N-H⋯O hydrogen bonds between the cations and anions. ...[more]

PMID: 21578138

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Poly[bis-[μ(2)-(dimethyl-aza-nium-yl)methyl-enediphospho-nato]magnesium].

Project description:The title compound, [Mg(C(3)H(10)NO(6)P(2))(2)](n), synthesized by a hydro-thermal method, adopts a one-dimensional polymeric chain structure and is isotypic with the previously reported Cd complex based on the ligand N,N-dimethyl-amino-methane-1,1-diphospho-nic acid (H(4)L). The asymmetric unit contains one half Mg(2+) ion and one H(3)L(-) anion. The unique Mg(2+) ion lies on an inversion center and is octa-hedrally coordinated by O atoms from six phospho-nate groups of four different H(3)L(-) anions. Each H(3)L(-) anion, with one protonated N atom and two phospho-nate OH groups, serves as a tridentate ligand. Two of its six phospho-nate O atoms chelate to a Mg(2+) cation in a bidentate fashion, while a third O atom bridges to a neighbouring Mg(2+) ion. The inter-connection of Mg(2+) ions by the H(3)L(-)anions leads to the formation of a polymer chain along the a axis in which the adjacent Mg(2+) ions are doubly bridged by two equivalent H(3)L(-) anions. These discrete chains are further assembled into a three-dimensional supra-molecular network via O-H⋯O and N-H⋯O hydrogen bonds involving the non-coordin-ated phospho-nate O atoms and the protonated N atoms.

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Bis(guanidinium) trans-diaqua-bis(malonato-?O,O')cobaltate(II).

Project description:In the title compound, (CH(6)N(3))(2)[Co(C(3)H(2)O(4))(2)(H(2)O)(2)], the anions lie on crystallographic centres of inversion. The crystal structure adopts a layered structure, stabilized by an extensive network of N-H?O and O-H?O hydrogen bonds. One H atom of the guanidinium cation does not participate in any strong hydrogen bonds.

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