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Bis(3-hydroxy-pyridine-?N)bis-(3-nitro-benzoato-?O)zinc(II).

ABSTRACT: The title complex, [Zn(C(7)H(4)NO(4))(2)(C(5)H(5)NO)(2)], has site symmetry 2. The Zn(II) ion is located on a crystallographic twofold rotation axis and assumes a distorted tetra-hedral ZnN(2)O(2) coordination geometry. Mol-ecules are linked by an inter-molecular O-H?O hydrogen bond and ?-? stacking inter-actions between pyridine rings [centroid-centroid speparation 3.594?(1)?Å].

SUBMITTER: Li JH

PROVIDER: S-EPMC2977432 | biostudies-literature | 2009 Jul

REPOSITORIES: biostudies-literature

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Bis(3-hydroxy-pyridine-κN)bis-(3-nitro-benzoato-κO)zinc(II).

Li Jun-Hua JH Nie Jing-Jing JJ Xu Duan-Jun DJ

Acta crystallographica. Section E, Structure reports online 20090715 Pt 8

The title complex, [Zn(C(7)H(4)NO(4))(2)(C(5)H(5)NO)(2)], has site symmetry 2. The Zn(II) ion is located on a crystallographic twofold rotation axis and assumes a distorted tetra-hedral ZnN(2)O(2) coordination geometry. Mol-ecules are linked by an inter-molecular O-H⋯O hydrogen bond and π-π stacking inter-actions between pyridine rings [centroid-centroid speparation 3.594 (1) Å]. ...[more]

PMID: 21583382

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Tetra-kis(?-4-methyl-benzoato-?O:O')bis-{[4-(dimethyl-amino)pyridine-?N]zinc(II)}.

Project description:In the centrosymmetric title binuclear complex, [Zn(2)(C(8)H(7)O(2))(4)(C(7)H(10)N(2))(2)], the Zn atoms [Zn?Zn = 3.0287?(6)?Å] are bridged by four 4-methyl-benzoate ligands. The four nearest O atoms around each Zn(II) atom form a distorted square-planar arrangement with the distorted square-pyramidal coordination completed by the pyridine N atom of the 4-(dimethyl-amino)pyridine ligand. In the crystal structure, weak inter-molecular C-H?O inter-actions link the mol-ecules into infinite chains. The chains are further linked by weak C-H?? inter-actions, forming a three-dimensional network.

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Crystal structure of bis-(?-4-nitro-benzoato-?2O:O')bis-[bis-(4-methyl-pyridine-?N)(4-nitro-benzoato-?2O,O')manganese(II)].

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Bis(?-3-hydroxy-benzoato)-?O:O;?O:O-bis-[bis-(1H-benzimidazole-?N)(3-hydroxy-benzoato-?O)nickel(II)] bis-(1H-benzimidazole-?N)bis-(3-hy-droxy-benzoato-?O)nickel(II) hexa-hydrate.

Project description:The title compound, [Ni(2)(C(7)H(5)O(3))(4)(C(7)H(6)N(2))(4)][Ni(C(7)H(5)O(3))(2)(C(7)H(6)N(2))(2)]·6H(2)O, is a mononuclear/dinuclear nickel(II) cocrystal, the two mol-ecular species inter-acting through hydrogen bonds that involve the uncoordinated water mol-ecules. In the mononuclear species, the Ni(II) ion, located on an inversion center, is coordinated by two 1H-benzimidazole (bzim) ligands and two 3-hydroxy-benzoate (hba) anions in a square-planar geometry. In the centrosymmetric dinuclear species, the Ni(II) ion is coordinated by two bzim ligands and three hba anions in a square-pyramidal geometry; of the two independent hba anions, one bridges two Ni(II) ions with both carboxylate and hydroxyl groups whereas the other coordin-ates in a unidentate manner to the Ni(II) ion. The apical Ni-O(hydrox-yl) bond is 0.39?Å longer than the basal Ni-O(carbox-yl) bonds. The face-to-face separation of 3.326?(9)?Å indicates the existence of ?-? stacking between parallel bzim ligands of adjacent dinuclear entities. Extensive N-H?O and O-H?O hydrogen bonds help to stabilize the crystal structure.

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