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Di-?-acetato-?O,O':O;?O:O,O'-bis-[(acetato-?O,O')(1,10-phenan-throline-?N,N')cadmium(II)].

ABSTRACT: The title compound, [Cd(2)(C(2)H(3)O(2))(4)(C(12)H(8)N(2))(2)], consists of dimeric units built up around a crystallographic symmetry centre. Each cadmium(II) unit is chelated by a 1,10-phenanthroline (phen) group and two acetate ligands, one of which also acts as a bridge, linking both seven-coordinated cadmium(II) centres. The crystal structure is governed by a single ?-? inter-action between stacked phen groups [centroid-centroid distance 3.5209?(11)?Å], leading to a planar structure parallel to (010).

SUBMITTER: Harvey MA

PROVIDER: S-EPMC2959765 | biostudies-literature | 2008 Oct

REPOSITORIES: biostudies-literature

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Di-μ-acetato-κO,O':O;κO:O,O'-bis-[(acetato-κO,O')(1,10-phenan-throline-κN,N')cadmium(II)].

Harvey Miguel Angel MA Baggio Sergio S Garland María Teresa MT Baggio Ricardo R

Acta crystallographica. Section E, Structure reports online 20081022 Pt 11

The title compound, [Cd(2)(C(2)H(3)O(2))(4)(C(12)H(8)N(2))(2)], consists of dimeric units built up around a crystallographic symmetry centre. Each cadmium(II) unit is chelated by a 1,10-phenanthroline (phen) group and two acetate ligands, one of which also acts as a bridge, linking both seven-coordinated cadmium(II) centres. The crystal structure is governed by a single π-π inter-action between stacked phen groups [centroid-centroid distance 3.5209 (11) Å], leading to a planar structure parallel ...[more]

PMID: 21580889

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Di-μ-chromato-κO:O'-bis-[bis-(phenan-throline-κN,N')cadmium(II)] dihydrate.

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Tetra-kis(?-4-methoxy-benzoato)bis-[(4-methoxy-benzoato)(1,10-phenan-throline)terbium(III)].

Project description:In the title dinuclear complex, [Tb(2)(C(8)H(7)O(3))(6)(C(12)H(8)N(2))(2)], each Tb(III) ion is eight-coordinated by two N atoms from a 1,10-phenanthroline ligand and six O atoms from the carboxyl-ate groups of five 4-methoxy-benzoate ligands in a distorted square-anti-prismatic geometry. All six 4-methoxy-benzoate ligands act in a bidentate mode, two coordinating to one Tb center each and the other four bridging two Tb centers [Tb?Tb separation = 4.3144?(6)?Å]. In the crystal, inter-molecular ?-? inter-actions between the aromatic rings of 1,10-phenanthroline and 4-methoxy-benzoate ligands [centroid-centroid distance = 3.742?(9)?Å] link two mol-ecules into a centrosymmetric dimer. Weak inter-molecular C-H?O hydrogen bonds help to consolidate the crystal packing.

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Di-?-acetato-?O,O':O';?O:O,O'-bis-[(acetato-?O,O')bis-(5-nitro-1,10-phenanthroline-?N,N')cadmium].

Project description:In the binuclear title compound, [Cd(2)(C(2)H(3)O(2))(4)(C(12)H(7)N(3)O(2))(2)], the Cd(II) cations are linked by carboxyl-ate O atoms into a four-membered Cd(2)O(2) rhombic ring with a Cd? Cd separation of 3.7515?(5)?Å. Each Cd(II) atom is seven-coordinated by a bidentate 5-nitro-1,10-phenanthroline (5-NO(2)-phen) ligand and two bidentate acetate anions, one of which also acts as a bridge linking the two Cd atoms. The crystal packing is stabilized by ?-? inter-actions between the phen rings of neighboring mol-ecules, with centroid-centroid distances of 3.491?(2) (intra-molecular) and 3.598?(2)?Å (inter-molecular).

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Di-?-chlorido-bis-[(1,10-phenanthroline-?N,N')(trichloro-acetato-?O)copper(II)].

Project description:The title compound, [Cu(2)(C(2)Cl(3)O(2))(2)Cl(2)(C(12)H(8)N(2))(2)], features a centrosymmetric binuclear complex. The coordination geometry around the Cu(II) atom is square-pyramidal, comprising two N atoms from a symmetrically chelating 1,10-phenanthroline ligand, one O atom from a trichloro-acetate ligand and two Cl(-) anions. In addition, there is a weak intra-molecular Cu?O inter-action of 2.9403?(14)?Å involving the carbonyl O atom of the trichloro-acetate ligand. The central Cu(2)Cl(2) core takes the form of a rhombus, owing to the disparate Cu-Cl bond lengths. Mol-ecules are connected in the crystal structure by C-H?Cl and C-H?O inter-actions.

| S-EPMC3297214 | biostudies-literature

?-Pyrazine-bis-[tetra-aqua-cadmium(II)] ?-pyrazine-bis-[tetra-acetato-cadmium(II)].

Project description:In the title dinuclear ionic complex, [Cd(2)(C(4)H(4)N(2))(H(2)O)(8)][Cd(2)(CH(3)CO(2))(8)(C(4)H(4)N(2))], the cation and anion are disordered equally over a site with symmetry mmm. The Cd(II) ions and the N atoms of the bridging pyrazine ligand lie on the inter-section of two crystallographic mirror planes. The C atoms of the bridging pyrazine ligand lie on one of these mirror planes, and the acetate groups and water mol-ecules lie across the inter-secting mirror planes. Each Cd(II) atom in the cation is five-coordinated by four O atoms from four water mol-ecules and one N atom from the bridging pyrazine ligand, whereas each Cd(II) in the anion is nine-coordinated by four pairs of O atoms from the bidentate acetate ligands and one N atom from the bridging pyrazine ligand. In the crystal structure, each anion is surrounded by eight nearest-neighbour cations and vice versa. The crystal structure is stabilized by ionic inter-actions as well as by C-H?O inter-actions.

| S-EPMC2961302 | biostudies-literature

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