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

ABSTRACT: 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.

SUBMITTER: Najafpour MM

PROVIDER: S-EPMC2915119 | biostudies-literature | 2007 Dec

REPOSITORIES: biostudies-literature

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

Najafpour M Mahdi MM Hołyńska Małgorzata M Lis Tadeusz T

Acta crystallographica. Section E, Structure reports online 20071218 Pt 1

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. ...[more]

PMID: 21200534

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Diammonium diaqua-bis(malonato-?O,O')cobaltate(II) dihydrate.

Project description:The title complex, (NH(4))(2)[Co(C(3)H(3)O(4))(2)(H(2)O)(2)]·2H(2)O, features a six-coordinate Co atom located on a center of symmetry. The octa-hedral O(6) coordination geometry is defined by two bidentate malonate ligands and two water mol-ecules, with the latter in a trans configuration. The mol-ecules are linked through O-H?O and N-H?O hydrogen-bonding inter-actions, forming a three-dimensional supra-molecular network.

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Project description:The title compound, (C(13)H(10)N)(2)[Co(C(6)H(2)N(2)O(4))(2)(H(2)O)(2)]·6H(2)O, consists of mononuclear trans-[Co(pz-2,3-dc)(2)(H(2)O)(2)](2-) complex anions, (acrH)(+) cations and uncoordinated water mol-ecules (acr is acridine and pz-2,3-dcH(2) is pyrazine-2,3-dicarboxylic acid). The Co(II) atom, which lies on a crystallographic center of symmetry, has a slightly distorted octa-hedral coordination environment, with two N and two O atoms from the (pz-2,3-dc)(2-) ligands in the equatorial plane and with two water mol-ecules in axial positions. In the crystal, the components are held together by two distinct N-H?O and C-H?O hydrogen bonds with R(2) (2)(8) graph-sets. The coordinated and uncoordinated water mol-ecules are also involved in O-H?O hydrogen bonds, which lead to the formation of layers with R(3) (3)(12) graph-set motifs. Extensive ?-? stacking inter-actions between parallel aromatic rings of the acridinium ions, with distances ranging from 3.533?(1) to 3.613?(1)?Å, occur in the structure.

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Project description:The title compound, (C(6)H(9)N(2))(2)[Co(C(6)H(2)N(2)O(4))(2)(H(2)O)(2)]·8H(2)O, was obtained by the reaction of CoCl(2)·6H(2)O with 1,4-pyrazine-2,3-dicarb-oxy-lic acid and 2-amino-6-methyl-pyridine in aqueous solution (molar ratio 1:2:2). The Co(II) ion is situated on an inversion centre and is coordinated by two O and two N atoms of two symmetry-related 1,4-pyrazine-2,3-dicarboxyl-ate ligands and two water mol-ecules and has a disorted octa-hedral coordination environment. The asymmetric unit also contains four water mol-ecules. In the crystal, extensive inter-molecular classical N-H?O, O-H?O and O-H?N hydrogen bonds and ?-? stacking inter-actions [centroid-centroid distance = 3.490?(1)?Å] connect the various components, forming a three-dimensional network.

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Bis(2-amino-4-methyl-pyrimidin-3-ium) trans-diaqua-bis-(pyrazine-2,3-di-car-boxylato)cobaltate(II) hexa-hydrate.

Project description:In the crystal structure of the mononuclear title compound, (C(5)H(8)N(3))(2)[Co(C(6)H(2)N(2)O(4))(2)(H(2)O)(2)]·6H(2)O or (ampymH)(2)[Co(pyzdc)(2)(H(2)O)(2)]·6H(2)O (ampym = 2-amino-4-methyl pyrimidine, pyzdcH(2) = pyrazine-2,3-dicarb-oxy-lic acid), the Co(II) ion is hexa-coordinated by two (pyzdc)(2-) groups in the equatorial plane and two water mol-ecules in axial positions, giving an N(2)CoO(4) bound set. The (pyzdc)(2-) anion acts as a bidentate ligand through one carboxyl-ate group O atom and pyrazine ring N atom. There are diverse N-H? O and O-H?O and O-H?N hydrogen-bonding inter-actions, which lead to the formation of a three-dimensional supra-molecular architecture. Off-set or slipped ?-? stacking inter-actions are also observed between adjacent pyrimidine rings with face-to-face distances of 3.6337?(9)?Å.

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Dicaesium diaqua-bis-(methyl-ene-diphospho-nato-?O,O')cobaltate(II).

Project description:The asymmetric unit of the title compound, Cs(2)[Co(CH(4)O(6)P(2))(2)(H(2)O)(2)], is comprised of one bidentate methyl-enediphospho-nate ligand and one water mol-ecule which are coordinated to the Co(II) atom, as well as a caesium counter-cation. The Co atom occupies a special position on a crystallographic inversion center. The caesium ion is octa-hedrally coordinated by six O atoms with Cs-O distances ranging from 3.119?(2) to 3.296?(2)?Å. A three-dimensional network is formed through O-H?O hydrogen bonds.

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Dipotassium diaqua-bis(methyl-enedi-phospho-nato-?O,O')cobaltate(II).

Project description:In the title complex, K(2)[Co(CH(4)O(6)P(2))(2)(H(2)O)(2)], the asymmetric unit contains two K(+) cations and two half-anions in which the Co atoms lie on inversion centers. The Co(II) ions assume an octa-hedral CoO(6) coordination geometry. In the crystal, a three-dimensional network is formed through O-H?O hydrogen-bond inter-actions as well as inter-molecular inter-actions between the K(+) cations and neighbouring O atoms.

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trans,trans,trans-Diaqua-bis(nicotin-amide-κN)bis-(2-nitro-benzoato-κO)copper(II).

Project description:The water-coordinated metal atom in the title compound, [Cu(C(7)H(4)NO(4))(2)(C(6)H(6)N(2)O)(2)(H(2)O)(2)], lies on a center of inversion in an all-trans octa-hedral environment with slight distortions. The mol-ecule inter-acts with adjacent mol-ecules through O-H⋯O and N-H⋯O hydrogen bonds, forming a layered network parallel to (010).

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Disodium diaqua-bis-(methyl-enedi-phos-pho-nato-?O,O')cobaltate(II) dihydrate.

Project description:In the title compound, Na(2)[Co(CH(4)O(6)P(2))(2)(H(2)O)(2)]·2H(2)O, the asymmetric unit is composed of one methyl-enediphospho-nate ligand and one water mol-ecule, which both are coordinated to a Co(II) atom, as well as a non-coordinated water mol-ecule and a sodium cation. The Co(II) atom occupies a special position on a crystallographic inversion centre. The slightly distorted Co(II)O(6) octa-hedral coordination environment is composed of two bidentate methyl-enediphospho-nate ligands and two coordinated water mol-ecules in trans positions. The sodium ion is octa-hedrally coordinated to six O atoms with Na-O distances ranging from 2.3149?(12) to 2.6243?(12)?Å. An extensive three-dimensional network of inter-molecular as well as intra-molecular O-H?O and C-H?O hydrogen bonding inter-acions is present.

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