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Diaqua-bis-(2-hy-droxy-5-meth-oxy-benzoato-κO)zinc.

ABSTRACT: The title compound, [Zn(C(8)H(7)O(4))(2)(H(2)O)(2)], has been synthesized by hydro-thermal methods. The Zn(II) atom, whose symmetry element is a twofold axis, is four coordinated by two O atoms from 5-meth-oxy-salicylate anions and two aqua O atoms in a distorted tetra-hedral geometry. In the crystal, mol-ecules are linked into a layer by O-H⋯O hydrogen bonds, which stabilize the packing.

SUBMITTER: Li T

PROVIDER: S-EPMC3200808 | biostudies-literature | 2011 Sep

REPOSITORIES: biostudies-literature

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Diaqua-bis-(2-hy-droxy-5-meth-oxy-benzoato-κO)zinc.

Li Tao T Tang Li-Rong LR Yang Lin L Huang Biao B

Acta crystallographica. Section E, Structure reports online 20110817 Pt 9

The title compound, [Zn(C(8)H(7)O(4))(2)(H(2)O)(2)], has been synthesized by hydro-thermal methods. The Zn(II) atom, whose symmetry element is a twofold axis, is four coordinated by two O atoms from 5-meth-oxy-salicylate anions and two aqua O atoms in a distorted tetra-hedral geometry. In the crystal, mol-ecules are linked into a layer by O-H⋯O hydrogen bonds, which stabilize the packing. ...[more]

PMID: 22058870

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Bis(4-meth-oxy-benzoato)-κO,O';κO-bis-(nicotinamide-κN)zinc(II).

Project description:The asymmetric unit of the title complex, [Zn(C(8)H(7)O(3))(2)(C(6)H(6)N(2)O)(2)], contains three crystallographically independent mol-ecules with similar configurations. The Zn(II) cation is coordinated by two N atoms of two nicotinamide ligands and three O atoms from two 4-meth-oxy-benzoate anions in a distorted trigonal-bipyramidal geometry. In each independent mol-ecule, one Zn-O bond distance [2.5181 (12), 2.5931 (12) and 2.4085 (12) Å for the three mol-ecules] is significantly longer than the other two. In the crystal structure, extensive N-H⋯O and C-H⋯O hydrogen bonding links the mol-ecules into a three-dimensional network. π-π contacts between the pyridine rings and between the pyridine and benzene rings [centroid-centroid distances = 3.7655 (9) and 3.8453 (10) Å, respectively] further stabilize the crystal structure.

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Diaqua-bis-(4-meth-oxy-benzoato-κO)bis-(nicotinamide-κN)cobalt(II) dihydrate.

Project description:In the mononuclear title compound, [Co(C(8)H(7)O(3))(2)(C(6)H(6)N(2)O)(2)(H(2)O)(2)]·2H(2)O, the Co(II) ion is located on a crystallographic inversion center. The asymmetric unit is completed by one 4-meth-oxy-benzoate anion, one nicotinamide (NA) ligand and one coordinated and one uncoordinated water mol-ecule. All ligands act in a monodentate mode. The four O atoms in the equatorial plane around the Co(II) ion form a slightly distorted square-planar arrangement, while the slightly distorted octa-hedral coordination is completed by the two pyridine N atoms of the NA ligands in the axial positions. The dihedral angle between the carboxyl-ate group and the attached benzene ring is 6.47 (7)°, while the pyridine and benzene rings are oriented at a dihedral angle of 72.80 (4)°. An O-H⋯O hydrogen bond links the uncoordinated water mol-ecule to one of the carboxyl-ate groups. In the crystal structure, inter-molecular O-H⋯O, N-H⋯O and C-H⋯O hydrogen bonds link the mol-ecules into a three-dimensional network.

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Triaqua-bis-[4-(meth-oxy-carbon-yl)benzoato-κO]zinc dihydrate.

Project description:In the crystal structure of the title complex, [Zn(C(9)H(7)O(4))(2)(H(2)O)(3)]·2H(2)O, the Zn atom and the apical aqua ligand are located on a crystallographic twofold axis, with the Zn(II) ion in a distorted square-pyramidal coordination geometry composed of five O atoms, two from the monodentate methyl-terephthalato group and three from water mol-ecules. The resulting complex and the two hydrate water mol-ecules are inter-connected by O-H⋯O hydrogen bonds.

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Diaqua-bis(4-methyl-benzoato-κO)zinc(II).

Project description:The Zn atom in the title mononuclear complex, [Zn(C(8)H(7)O(2))(2)(H(2)O)(2)], lies on a special position of site symmetry 2. The carboxyl-ate group binds in a monodentate manner so that the geometry is best described as tetra-hedral. Adjacent mol-ecules are linked by O-H⋯O hydrogen bonds into a three-dimensional network.

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Diaqua-bis-(2-hy-droxy-benzoato-κO (1))bis-(nicotinamide-κN (1))cadmium-diaqua-bis-(2-hy-droxy-benzoato-κ(2) O (1),O (1'))(nico-tin-amide-κN)cadmium-water (1/2/4).

Project description:The crystal structure of the title compound, [Cd(C7H5O3)2(C6H6NO)2(H2O)2]·2[Cd(C7H5O3)2(C6H6NO)(H2O)2]·4H2O, consists of two kinds of Cd(II) complexes (A and B) and lattice water mol-ecules. In complex A, [Cd(C7H5O3)2(C6H6NO)2(H2O)2], the Cd(II) cation is located on an inversion center and is coordinated by two salicylate anions, two nicotinamide (NA) ligands and two water mol-ecules in a slightly distorted octa-hedral geometry. In complex B, [Cd(C7H5O3)2(C6H6NO)(H2O)2], the Cd(II) cation is coordinated by two salicylate anions, one nicotinamide (NA) ligand and two water mol-ecules in an irregular seven-coordinate geometry. There are extensive intra-molecular O-H⋯O and weak C-H⋯O hydrogen bonds as well as extensive inter-molecular O-H⋯O and N-H⋯O hydrogen bonding in the crystal structure. π-π stacking between the pyridine and benzene rings, between the benzene rings, between the benzene and pyridine rings and between the pyridine rings [centroid-centroid distances = 3.5989 (10), 3.6005 (10), 3.5800 (9) and 3.5205 (10) Å, respectively] further stabilize the crystal structure. A weak N-H⋯π inter-action also occurs. One of the lattice water mol-ecules is disordered over two positions with an occupancy ratio of 0.70:0.30.

| S-EPMC3629475 | 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

Diaqua-bis(2-bromo-benzoato-κO)bis-(nicotinamide-κN)zinc(II).

Project description:The title Zn(II) complex, [Zn(C(7)H(4)BrO(2))(2)(C(6)H(6)N(2)O)(2)(H(2)O)(2)], is centrosymmetric with the Zn atom on an inversion center. The mol-ecule contains two 2-bromo-benzoate (BB) and two nicotinamide (NA) ligands and two coordinated water mol-ecules, all ligands being monodentate. The four O atoms in the equatorial plane around the Zn atom form a slightly distorted square-planar arrangement, while the slightly distorted octa-hedral coordination is completed by the two N atoms of the NA ligands in the axial positions. The dihedral angle between the carboxyl group and the adjacent benzene ring is 31.14 (12)°, while the pyridine and benzene rings are oriented at a dihedral angle of 83.54 (5)°. In the crystal structure, O-H⋯O and N-H⋯O hydrogen bonds link the mol-ecules into infinite chains. A weak C-H⋯π inter-action is also present.

| S-EPMC2977639 | biostudies-literature

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