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Tetra-aqua-bis(1-hydr-oxy-2-naphthoato-?O)magnesium(II).

ABSTRACT: In the title mononuclear complex, [Mg(C(11)H(7)O(3))(2)(H(2)O)(4)], the Mg(II) atom is located on a centre of inversion and is coordinated by two O atoms from two 1-hydr-oxy-2-naphthoate ligands and four water mol-ecules in an octa-hedral geometry. The structure is consolidated by inter-molecular O-H?O hydrogen bonding, as well as by ?-? stacking inter-actions between adjacent naphthyl ring systems [centroid-centroid distance between parallel naphthoate rings is 3.768?(2)?Å].

SUBMITTER: Huang F

PROVIDER: S-EPMC2960898 | biostudies-other | 2008

REPOSITORIES: biostudies-other

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Tetra-aqua-bis(1-hydr-oxy-2-naphthoato-κO)magnesium(II).

Huang Fu F Song Wen-Dong WD

Acta crystallographica. Section E, Structure reports online 20080314 Pt 4

In the title mononuclear complex, [Mg(C(11)H(7)O(3))(2)(H(2)O)(4)], the Mg(II) atom is located on a centre of inversion and is coordinated by two O atoms from two 1-hydr-oxy-2-naphthoate ligands and four water mol-ecules in an octa-hedral geometry. The structure is consolidated by inter-molecular O-H⋯O hydrogen bonding, as well as by π-π stacking inter-actions between adjacent naphthyl ring systems [centroid-centroid distance between parallel naphthoate rings is 3.768 (2) Å]. ...[more]

PMID: 21202009

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Tetra-aqua-bis(1-hydr-oxy-2-naphthoato-?O)zinc(II).

Project description:In the title mononuclear complex, [Zn(C(11)H(7)O(3))(2)(H(2)O)(4)], the Zn(II) atom is located on a centre of inversion and is coordinated by two O atoms from two 1-hydr-oxy-2-naphthoate ligands and four water mol-ecules in an octa-hedral geometry. The structure is consolidated by inter-molecular O-H?O hydrogen bonding, as well as by a ?-? stacking inter-action [centroid-centroid distance 3.762?(2)Å] between adjacent naphthyl ring systems.

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Project description:The title compound, [Co(C(12)H(8)N(2))(H(2)O)(4)](2)[Co(H(2)O)(6)](C(11)H(7)O(8))(2)·4H(2)O, was obtanied by the reaction of cobalt acetate with 3,5-bis-(carb-oxy-meth-oxy)benzoic acid and 1,10-phenanthroline. The asymmetric unit contains one tetra-aqua-(1,10-phenanthroline)cobalt(II) cation, one half of a hexa-aqua-cobalt(II) cation that is completed by inversion symmetry, one 3,5-bis-(carboxyl-atometh-oxy)benzoate trianion and two lattice water mol-ecules. The two Co(II) atoms each show a slightly distorted octa-hedral coordination (CoO(6) and CoO(4)N(2)). The cations, anions and lattice water mol-ecules are linked by an intricate network of O-H?O hydrogen bonds into a three-dimensional structure.

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Project description:In the complex cation of the title compound, [Mg(C(10)H(8)N(2))(H(2)O)(4)](C(7)H(4)BrO(2))(2), the Mg(II) atom is coordinated by two N atoms from a 2,2'-bipyridine ligand and four water O atoms in a distorted MgN(2)O(4) octa-hedral geometry. The cation is located on a special position on a twofold rotation axis which passes through the Mg(II) atom and the centroid of the 2,2'-bipyridine ligand. The 2,2'-bipyridine ligands exhibit nearly perfect coplanarity (r.m.s. deviation = 0.0035?Å) . In the crystal, O-H?O and C-H?O, C-H?Br hydrogen bonds and ?-? stacking inter-actions [mean inter-planar distance of 3.475?(6)?Å between adjacent 2,2'-bipyridine ligands] link the cations and anions into a three-dimensional supra-molecular network. One Br atom is disordered over two sites with occupancy factors of 0.55 and 0.45.

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Tetra-aqua-(2,2'-bipyridine-?N,N')magnesium(II) bis-(4-fluoro-benzoate).

Project description:The title compound, [Mg(C(10)H(8)N(2))(H(2)O)(4)](C(7)H(4)FO(2))(2), consists of a bivalent [Mg(C(10)H(8)N(2))(H(2)O)(4)](2+) cation and two 4-fluorbenzoate anions. In the complex cation, the Mg(II) atom is coordinated by two N atoms from a 2,2'-bipyridine ligand and four water O atoms in a distorted MgN(2)O(4) octa-hedral geometry. The Mg(II) atom is located on a twofold rotation axis and thus a cation exhibits C(2) mol-ecular symmetry. The 2,2'-bipyridine ligands exhibit nearly perfect planarity (r.m.s. deviations = 0.0061?Å). In the crystal, O-H?O and C-H?O hydrogen bonds link the cations and anions into a three-dimensional supra-molecular network.

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Aqua-(2-hydr-oxy-5-sulfonatobenzoato-?O)bis-(2-phenyl-1H-1,3,7,8-tetra-aza-cyclo-penta-[l]phenanthrene-?N,N)zinc(II).

Project description:In the title compound, [Zn(C(7)H(4)O(6)S)(C(19)H(12)N(4))(2)(H(2)O)], the Zn(II) ion is coordinated by two N,N'-bidentate 2-phenyl-1H-1,3,7,8-tetra-azacyclo-penta-[l]phenanthrene ligands, one O-monodentate 5-sulfosalicylate dianion and a water mol-ecule. This results in a distorted cis-ZnO(2)N(4) octa-hedral coordination geometry for the metal ion. In the crystal, mol-ecules are expanded into a three-dimensional supra-molecular motif via O-H?O, O-H?N and N-H?(O,S) hydrogen bonds. In addition, ?-? stacking inter-actions between the aromatic rings of the polycyclic ligands consolidate the sturcture [shortest centroid-centroid distance = 3.501?(2)?Å].

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Bis[hexa-aquacobalt(II)] 25,26,27,28-tetra-hydr-oxy-2,8,14,19-tetra-thia-calix[4]arene-5,11,17,23-tetra-sulfonate monohydrate.

Project description:In the crystal structure of the title compound, [Co(H(2)O)(6)](2)(C(24)H(12)O(16)S(8))·H(2)O, the thia-calix[4]arenetetra-sulfonate (= TCAS(4-)) anions adopt a cone-type conformation with an additional water mol-ecule as a guest mol-ecule in the hydro-phobic cavity. The TCAS(4-) anions are arranged in layers in an up-down fashion. These anionic layers alternate with cationic layers consisting of rather regular octahedral cations (symmetry m). Several medium O-H⋯O hydrogen-bond inter-actions exist between the aqua ligands of the [Co(H(2)O)(6)](2+) cations and the O atoms of the sulfonate groups. In addition to the two crystallographically different Co atoms, two S and four O atoms are situated on mirror planes.

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Project description:In the structure of the title compound, [Mg(C7H3N2O6)2(H2O)4]·4H2O, the slightly distorted octa-hedral MgO6 coord-in-ation polyhedron comprises two trans-related carboxyl-ate O-atom donors from mononodentate 3,5-dinitro-benzoate ligands, and four water mol-ecules. The coordinating water mol-ecules and the four water mol-ecules of solvation give both intra- and inter-unit O-H⋯O hydrogen-bonding inter-actions with carboxyl-ate, water and nitro O-atom acceptors, forming a three-dimensional structure.

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