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Tetra-aqua-(2-hy-droxy-acetato-κO,O)magnesium nitrate.

ABSTRACT: In the title complex, [Mg(C(2)H(3)O(3))(H(2)O)(4)]NO(3), the Mg(II) cation is hexa-coordinated by four O atoms from water mol-ecules and two O atoms from a 2-hy-droxy-acetate ligand in a distorted octa-hedral coordination geometry. The structure exhibits a three-dimensional supra-molecular network, which is stabilized by nine different O-H⋯O hydrogen bonds.

SUBMITTER: Liu WJ

PROVIDER: S-EPMC3052091 | biostudies-literature |

REPOSITORIES: biostudies-literature

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Tetra-aqua-bis-[2-(2-nitro-phen-yl)acetato-κO]cobalt(II).

Project description:The mol-ecule of the title compound, [Co(C8H6NO4)2(H2O)4], is centrosymmetric. It is a cobalt(II) complex, bearing two (2-nitro-phen-yl)acetate and four aqua ligands. The coordination around the Co(II) atom is distorted octa-hedral, defined by four O atoms of water mol-ecules in the equatorial plane and by two carboxyl-ate O atoms at axial positions. The dihedral angles between the benzene ring and the acetate and nitro groups are 61.90 (10) and 19.21 (11)°, respectively. The water mol-ecules form O-H⋯O hydrogen bonds with the nitro and carboxyl-ate groups, leading to a layered structural arrangement parallel to (001).

| S-EPMC4350698 | biostudies-literature

Tetra-kis[?-2-(4-hy-droxy-phenyl)-acetato]-?O,O':O;?O:O,O'-bis-{aqua-(4,4'-bi-pyridine-?N)bis-[2-(4-hy-droxy-phenyl)-acetato-?O,O]neodymium(III)} monohydrate.

Project description:The title complex, [Nd(2)(C(8)H(7)O(3))(6)(C(10)H(8)N(2))(2)(H(2)O)(2)]·H(2)O, contains two Nd atoms, six 4-hy-droxy-phenyl-acetate (hpaa) anions, two 4,4'-bipyridine mol-ecules (bipy) and two water mol-ecules; an additional water mol-ecule of solvation is also present in the crystal structure. Each of the Nd(III) ions is nine-coordinated by seven O atoms from four hpaa ligands, an N atom from a bipy ligand and an O atom from a water mol-ecule in a distorted tricapped trigonal-prismatic geometry. The hpaa ligands are coordinated to the Nd(III) ions in the bridging and bridging tridentate modes. Extensive O-H?O, O-H?N and C-H?O hydrogen bonding stabilizes the crystal structure.

| S-EPMC3009128 | biostudies-literature

Bis(μ-3-hy-droxy-benzoato)-κO,O:O;κO:O,O-bis-[(3-hy-droxy-benzoato-κO,O')(iso-nicotinamide-κN)cadmium] tetra-hydrate.

Project description:In the title centrosymmetric binuclear Cd(II) compound, [Cd(2)(C(7)H(5)O(3))(4)(C(6)H(6)N(2)O)(2)]·4H(2)O, the six-coordinated Cd(II) atom is chelated by the carboxyl-ate groups of the two 3-hy-droxy-benzoate (HB) anions; the two monomeric units are bridged through the two O atoms of the two carboxyl-ate groups. In the crystal, O-H⋯O, N-H⋯O and C-H⋯O hydrogen bonds link the mol-ecules into a three-dimensional network. π-π Contacts between the pyridine rings and between the benzene rings [centroid-centroid distances = 3.770 (1), 3.769 (1) and 3.632 (1) Å] may further stabilize the structure.

| S-EPMC3274919 | biostudies-literature

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Project description:In the title complex, [Cu(C(14)H(11)O(3))(C(10)H(8)N(2))(2)]NO(3)·2H(2)O, the Cu(II) atom is coordinated by four N atoms from two 2,2'-bipyridine ligands and two O atoms from one benzilate ligand in a distorted octa-hedral geometry. A supra-molecular network is formed via inter-molecular O-H?O and C-H?O hydrogen-bonding inter-actions. ?-? stacking inter-actions between neighboring pyridine rings are also present, the centroid-centroid distance being 3.808?(2)?Å.

| S-EPMC2983227 | biostudies-literature

Bis{2-[bis-(2-hy-droxy-eth-yl)amino]-acetato-κO,N,O'}zinc(II).

Project description:In the crystal structure of the zinc(II) complex of bicine, [Zn(C(6)H(12)NO(4))(2)], the deprotonated amino acid O,N,O'-chelates to the metal atom through a carboxyl-ate O atom, a hy-droxy O atom and the N atom, the three atoms occupying fac positions of the distorted octa-hedron surrounding the metal atom. The metal atom lies on a center of inversion. The uncoordinated carboxyl-ate O atom is hydrogen bonded to the hy-droxy groups of adjacent mol-ecules, these two hydrogen bonds leading to the formation of a three-dimensional network.

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trans-Tetra-aqua-bis-(isonicotinamide-?N)cobalt(II) bis-(3-hy-droxy-benzoate) tetra-hydrate.

Project description:The asymmetric unit of the title compound, [Co(C(6)H(6)N(2)O)(2)(H(2)O)(4)](C(7)H(5)O(3))(2)·4H(2)O, contains one-half of the complex cation with the Co(II) ion located on an inversion center, a 3-hy-droxy-benzoate counter-anion and two uncoordinated water mol-ecules. Four water O atoms in the equatorial plane around the Co(II) ion [Co-O = 2.0593?(16) and 2.1118?(16)?Å] form a slightly distorted square-planar arrangement, and the distorted octahedral geometry is completed by the two N atoms [Co-N = 2.1306?(18)?Å] from two isonicotinamide ligands. In the anion, the carboxyl-ate group is twisted from the attached benzene ring at 8.84?(17)°. In the crystal, a three-dimensional hydrogen-bonding network, formed by classical O-H?O and N-H?O hydrogen bonds, consolidates the crystal packing, which exhibits ?-? inter-actions between the benzene and pyridine rings, with centroid-centroid distances of 3.458?(1) and 3.606?(1)?Å, respectively.

| S-EPMC3297218 | biostudies-literature

trans-Tetra-aqua-bis-(isonicotinamide-?N (1))zinc bis-(3-hy-droxy-benzoate) tetra-hydrate.

Project description:The asymmetric unit of the title compound, [Zn(C6H6N2O)2(H2O)4](C7H5O3)2·4H2O, contains half of the complex cation with the Zn(II) ion located on an inversion center, a 3-hy-droxy-benzoate counter-anion and two uncoordinating water mol-ecules. Four water O atoms in the equatorial plane around the Zn(II) ion [Zn-O = 2.089?(2) and 2.128?(2)?Å] form a slightly distorted square-planar arrangement and the distorted octa-hedral geometry is completed by the two N atoms [Zn-N = 2.117?(2)?Å] from two isonicotinamide ligands. In the anion, the carboxyl-ate group is twisted from the attached benzene ring at 9.0?(2)°. In the crystal, a three-dimensional hydrogen-bonding network, formed by classical O-H?O and N-H?O and weak C-H?O hydrogen bonds, consolidates the crystal packing, which exhibits ?-? stacking between the benzene and pyridine rings, with centroid-centroid distances of 3.458?(2) and 3.609?(2)?Å. One of the two H atoms of each uncoordinating water mol-ecule is disordered over two orientations with an occupancy ratio of 0.60:0.40.

| S-EPMC3629480 | biostudies-literature

trans-Tetra-aqua-bis-(isonicotinamide-κN)nickel(II) bis-(3-hy-droxy-benzoate) tetra-hydrate.

Project description:The asymmetric unit of the title compound, [Ni(C(6)H(6)N(2)O)(2)(H(2)O)(4)](C(7)H(5)O(3))(2)·4H(2)O, contains one-half of the complex cation with the Ni(II) ion located on an inversion center, a 3-hy-droxy-benzoate counter-anion and two uncoordinated water mol-ecules. Four water O atoms in the equatorial plane around the Ni(II) ion [Ni-O = 2.052 (2) and 2.079 (2) Å] form a slightly distorted square-planar arrangement, which is completed up to a distorted octa-hedron by the two N atoms [Ni-N = 2.075 (3) Å] from two isonicotinamide ligands. In the anion, the carboxyl-ate group is twisted from the attached benzene ring by 8.8 (3)°. In the crystal, a three-dimensional hydrogen-bonding network, formed by classical O-H⋯O and N-H⋯O hydrogen bonds, consolidates the crystal packing, which also exhibits π-π inter-actions between the benzene and pyridine rings, with centroid-centroid distances of 3.455 (2) and 3.621 (2) Å, respectively.

| S-EPMC3274920 | biostudies-literature

trans-Tetra-aqua-bis-(pyridazine-4-car-box-yl-ato-κO)magnesium(II) dihydrate.

Project description:The crystal structure of the title compound, [Mg(C(5)H(3)N(2)O(2))(2)(H(2)O)(4)]·2H(2)O, is composed of centrosymmetric monomers in which an Mg(II) ion is coordinated by two carboxyl-ate O atoms from the two pyridazine-4-carboxylate ligands. The monomers linked by O-H⋯O and O-H⋯N hydrogen bonds into layers which are held together by hydrogen bonds in which solvent water O atoms act as donors and acceptors, resulting in a three-dimensional network.

| S-EPMC3051979 | biostudies-literature

Aqua-bis-(4-chloro-2-hy-droxy-benzoato-κO)(1,10-phenanthroline-κN,N')zinc(II).

Project description:In the title compound, [Zn(C(7)H(4)ClO(3))(2)(C(12)H(8)N(2))(H(2)O)], the Zn(II) cation is coordinated by two 4-chloro-2-salicylate anions, one 1,10-phenanthroline ligand and one water mol-ecule in a square-pyramidal coordination geometry; the Zn cation lies 0.4591 (11) Å from the basal plane. The benzene rings of the anions are involved in π-π stacking. The centroid-centroid distance between parallel benzene rings of adjacent mol-ecules is 3.9017 (17) Å, and the centroid-centroid distance between benzene and pyridine rings of adjacent mol-ecules is 3.584 (2) Å. Intra-molecular O-H⋯O hydrogen bonding is present.

| S-EPMC3151932 | biostudies-literature

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