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1.  Poly[bis­(μ7-3-sulfonato-l-alaninato)sodiumzinc] 
The hydro­thermal reaction of Zn(CH3COO)2, NaOH and l-cysteic acid produced the title compound, [Na2Zn(C3H5NO5S)2]n. The ZnII cation is situated on an inversion centre and is in a distorted octa­hedral environment, being chelated by two deprotoned l-cysteic acid ligands through two amino N atoms and two carb­oxy­lic O atoms, with the two axial positions occupied by two carb­oxy­lic O atoms from two other l-cysteic acid ligands. Each l-cysteic acid ligand bridges five NaI ions via its sulfonate group and two ZnII ions via its carboxyl group, forming a three-dimensional framework. Weak N—H⋯O hydrogen bonding is observed in the crystal structure.
PMCID: PMC3379187  PMID: 22719385
2.  N-Cyclo­hexyl-N-{[3-(4,6-dimeth­oxy­pyrimidin-2-yl­oxy)pyridin-2-yl]meth­yl}4,6-dimeth­oxy­pyrimidin-2-amine 
In the title compound, C24H30N6O5, the cyclo­hexyl ring adopts a chair conformation, while the remainder of the mol­ecule adopts a U-shape. The dihedral angles between the pyridine ring and the pendant pyrimidine rings are 69.04 (12) and 75.99 (9)°. The two pyrimidine rings, however, are nearly parallel to one another, with a dihedral angle of 8.56 (15)° between them. They are also involved in an intra­molecular π–π stacking inter­action with a distance of 3.6627 (18) Å between the ring centroids. In the crystal, C—H⋯O contacts link the mol­ecules into chains along the b axis.
PMCID: PMC3344196  PMID: 22606199
3.  2-(4-Methyl­phen­yl)-5-[({[5-(4-methyl­phen­yl)-1,3,4-thia­diazol-2-yl]sulfan­yl}meth­yl)sulfan­yl]-1,3,4-thia­diazole 
In the title compound, C19H16N4S4, the mol­ecules exhibit a butterfly conformation, where the thia­diazole and attached benzene rings in two wings are almost coplanar, with dihedral angles of 0.8 (3) and 0.9 (3)°, respectively, while the two thia­diazole rings form a dihedral angle of 46.3 (3)°.
PMCID: PMC3297906  PMID: 22412709
4.  A second polymorph of aqua­{4-chloro-2-[(pyridin-2-ylmeth­yl)imino­meth­yl]­phenolato}copper(II) nitrate mono­hydrate 
The title complex, [Cu(C13H10ClN2O)(H2O)]NO3·H2O, was obtained by the reaction of 5-chloro­salicyl­aldehyde, 2-(amino­meth­yl)pyridine and copper nitrate in methanol. The first reported polymorph of this complex was triclinic [Liang et al. (2010 ▶). Acta Cryst. E66, m40]. The present polymorph crystallized in the monoclinic space group P21/c. The CuII ion is in a square planar environment and is coordinated by one phenolate O, one imine N and one pyridine N atom of the tridentate Schiff base ligand and by one water O atom. In the crystal, mol­ecules are linked through inter­molecular O—H⋯O hydrogen bonds to form chains along the a axis.
PMCID: PMC3297234  PMID: 22412424
5.  Poly[tris­(μ3-2-amino­ethane­sulfonato)­cobalt(II)potassium] 
The title compound, [CoK(C2H6NO3S)3]n, is isotypic with its NiII analogue. The CoII atom is chelated by the three taurinate ligands in a distorted octa­hedral geometry and in a facial manner. Each taurinate ligand bridges two K+ ions via its sulfonate group, forming a three-dimensional framework. Weak N—H⋯O hydrogen bonding is observed in the crystal structure.
PMCID: PMC3201518  PMID: 22058721
6.  Bis{4-bromo-2-[(2-hy­droxy­eth­yl)imino­meth­yl]phenolato-κ3 O,N,O′}cadmium 
The centrosymmetric title compound, [Cd(C9H9BrNO2)2], was obtained by the reaction of 5-bromo­salicyl­aldehyde, 2-amino­ethanol and cadmium nitrate in ethanol. The Cd atom, located on an inversion centre, is hexa­coordinated by two Schiff base ligands in an octa­hedral coordination through the phenolate O atom, the imine N atom and the hy­droxy O atoms. In the crystal, mol­ecules are linked through inter­molecular O—H⋯O hydrogen bonds, forming chains along the b axis.
PMCID: PMC3212126  PMID: 22090828
7.  Poly[[diaqua­(μ2-1,4-dioxane-κ2 O:O′)(μ2-2,3,5,6-tetra­fluoro­benzene-1,4-dicarboxyl­ato-κ2 O 1:O 4)copper(II)] 1,4-dioxane disolvate dihydrate] 
In the title complex, {[Cu(C8F4O4)(C4H8O2)(H2O)2]·2C4H8O2·2H2O}n, the CuII ion is six-coordinated by two oxygen donors from two trans 2,3,5,6-tetra­fluoro-1,4-dicarboxyl­ate (BDC-F4) ligands, two O atoms from two chair 1,4-dioxane ligands and two O atoms from two terminal water mol­ecules, adopting a distorted octa­hedral coordinated geometry. Each BDC-F4 anion bridges two CuII ions in a bis-monodentate fashion, forming a [Cu(BDC-F4)]n chain. These chains are further linked by bridging 1,4-dioxane ligands, generating a two-dimensional net with approximately recta­ngular grids of 11.253 × 7.654 Å. Such adjacent parallel layers are connected by O—H⋯O hydrogen bonds between guest water mol­ecules and the uncoordinated carboxyl­ate O atoms and coordinated water mol­ecules into the final three-dimensional supra­molecular network.
PMCID: PMC3089286  PMID: 21754269
8.  Methyl 4-bromo-3-hy­droxy­benzoate 
In the title compound, C8H7BrO3, the meth­oxy­carbonyl group is twisted at a dihedral angle of 8.06 (4)° with respect to the benzene ring. In the crystal, mol­ecules are connected by O—H⋯O hydrogen bonds into helical chains running along the b axis.
PMCID: PMC3050187  PMID: 21522626
9.  Diaqua­[(E)-2-(2-oxidobenzyl­idene­amino)-2-phenyl­acetato]zinc(II) dimethyl sulfoxide monosolvate 
In the title compound, [Zn(C15H11NO3)(H2O)2]·C2H6OS, the Zn(II) ion is coordinated by two O atoms and one N atom of the deprotonated chelate ligand and two water mol­ecules in a distorted trigonal bipyramidal coordination environment. A linear supra­molecular structure built from O—H⋯O hydrogen bonds runs parallel to [100].
PMCID: PMC2969243  PMID: 21582676
10.  Bis{4-[(Z)-(4-fluoro­benzyl­amino)(phenyl)­methyl­ene]-3-methyl-1-phenyl-1H-pyrazol-5(4H)-onato-κ2 N 4,O}nickel(II) 
The mol­ecule of the title compound, [Ni(C24H19FN3O)2], has twofold rotation symmetry. The NiII ion is in a square-planar coordination geometry which is distorted towards tetra­hedral and is coordinated by two N atoms of imine and two O atoms of pyrazolone from two Schiff base 4-[(Z)-(4-fluoro­benzyl­amino)phenyl­methyl­ene]-3-methyl-1-phenyl-1H-pyrazol-5(4H)-onate ligands.
PMCID: PMC2961089  PMID: 21202192

Results 1-10 (10)