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Bis(3-amino-pyrazine-2-carboxyl-ato-?N,O)diaqua-manganese(II).

ABSTRACT: The Mn(II) atom in the title compound, [Mn(C(5)H(4)N(3)O(2))(2)(H(2)O)(2)], exhibits an octa-hedral geometry comprising the two O atoms and two N atoms from two 3-amino-pyrazine-2-carboxyl-ate ligands, which act as chelating ligands, and two water mol-ecules. An intra-molecular N-H?O hydrogen bond occurs. In the crystal, N-H?O, O-H?N and O-H?O hydrogen bonds link adjacent mol-ecules into a three-dimensional network. The mol-ecule lies on a twofold rotation axis.

SUBMITTER: Zheng MY

PROVIDER: S-EPMC2983285 | biostudies-literature | 2010 Sep

REPOSITORIES: biostudies-literature

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Bis(3-amino-pyrazine-2-carboxyl-ato-κN,O)diaqua-manganese(II).

Zheng Min-Yan MY Wei Yong-Sheng YS Geng Wei W Fan Guang G

Acta crystallographica. Section E, Structure reports online 20100908 Pt 10

The Mn(II) atom in the title compound, [Mn(C(5)H(4)N(3)O(2))(2)(H(2)O)(2)], exhibits an octa-hedral geometry comprising the two O atoms and two N atoms from two 3-amino-pyrazine-2-carboxyl-ate ligands, which act as chelating ligands, and two water mol-ecules. An intra-molecular N-H⋯O hydrogen bond occurs. In the crystal, N-H⋯O, O-H⋯N and O-H⋯O hydrogen bonds link adjacent mol-ecules into a three-dimensional network. The mol-ecule lies on a twofold rotation axis. ...[more]

PMID: 21587383

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Diaqua-bis(pyrazine-2-carboxyl-ato-?N,O)manganese(II) dihydrate.

Project description:In the title compound, [Mn(C(5)H(3)N(2)O(2))(2)(H(2)O)(2)]·2H(2)O, the Mn(II) atom, lying on an inversion centre, has a distorted octa-hedral environment and the molecules are linked by O-H?O and N-H?O hydrogen bonds to form a three-dimensional supra-molecular structure.

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Diaqua-bis-(pyridine-2-carboxyl-ato-κN,O)manganese(II) dimethyl-formamide hemisolvate.

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Bis(3-amino-pyrazine-2-carboxyl-ato-?(2)N(1),O)diaqua-cobalt(II).

Project description:In the title compound, [Co(C(5)H(4)N(3)O(2))(2)(H(2)O)(2)], the Co(II) atom is situated on a twofold rotation axis and is N,O-chelated by two 3-amino-pyrazine-2-carboxyl-ate anions and additionally bonded to the O atoms of two water mol-ecules, leading to a slightly distorted octa-hedral coordination environment. The crystal packing is dominated by inter-molecular O-H?O, O-H?N and N-H?O hydrogen bonding involving the water mol-ecules and amino groups as donors and carboxyl-ate O atoms, as well as the non-coordinating heterocyclic N atoms as acceptors, resulting in a three-dimensional network. An intra-molecular N-H?O hydrogen bond is also observed.

| S-EPMC3569217 | biostudies-other

Diaqua-bis-(5-methyl-pyrazine-2-carboxyl-ato-?N,O)cadmium.

Project description:In the title compound, [Cd(C(6)H(5)N(2)O(2))(2)(H(2)O)(2)], the Cd(II) ion is coordinated in a severely distorted octa-hedral geometry. The N atoms are cis to each other, while the water O atoms and ligand O atoms are mutually trans. The crystal structure is stabilized by a network of O-H?O, O-H?N and C-H?O hydrogen bonds and ?-? stacking inter-actions [centroid-centroid distances = 3.730?(3) and 3.652?(3)?Å] between the 5-methyl-pyrazine-2-carboxyl-ate ligands. The structure is isotypic with the manganese analog.

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Diaqua-bis-(1H-imidazole-4-carboxyl-ato-?(2) N (3),O (4))manganese(II).

Project description:In the title compound, [Mn(C4H3N2O2)2(H2O)2], the Mn(II) ion is located on a twofold rotation axis and displays a distorted octa-hedral coordination environment, defined by two N,O-bidentate 1H-imidazole-4-carboxyl-ate ligands in the equatorial plane and two water mol-ecules in axial positions. In the crystal, O-H?O and N-H?O hydrogen bonds link the mol-ecules into a three-dimensional supra-molecular network. ?-? stacking inter-actions between the imidazole rings [centroid-centroid distances = 3.5188?(15) and 3.6687?(15)?Å] further stabilize the structure.

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