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1312 citations found for Yu,

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Heat treatments in the (α + β) or β phase regime and subsequent cooling induce significant microstructural changes in Zr-Excel (Zr–3.5Sn–0.8Mo–0.8Nb) by generating nondiffusional complex martensitic products. In the current study it is shown how modern whole pattern diffraction line profile analysis can individually characterize the defect structure of the martensitic and non-martensitic components of heat-treated Zr-Excel samples.

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The title compound, C12H9NO2, was prepared by an Aldol reaction of furfuraldehyde with 2,3-dihydro-1H-pyrrolizin-1-one. The mol­ecule is almost planar, with an r.m.s. deviation of 0.045 Å, excluding the methyl­ene H atoms. In the crystal structure, mol­ecules are linked via weak inter­molecular C-H...O hydrogen bonding and aromatic [pi]-[pi] stacking [centroid-centroid distance = 3.6151 (9) Å].

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The title compound, C10H14N2O4S, was synthesized by the reaction of methyl 2-amino­thia­zole-5-carboxyl­ate and di-tert-butyl carbonate. In this structure, the thia­zole ring is planar (mean deviation = 0.0011 Å). Two weak intra­molecular C-H...O hydrogen bonds are formed between two of the methyl groups and one carbonyl O atom, resulting in the formation of two twisted six-membered rings. Inter­molecular N-H...N hydrogen bonds link the mol­ecules to form centrosymmetric dimeric units, and the hydrogen-bond scheme is completed by inter­molecular C-H...O contacts.

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The UDP-N-acetylmuramoyl-tripeptide-D-alanyl-D-alanine ligase from A. baumannii has been crystallized and preliminary X-ray diffraction data have been collected.

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Acta Cryst. (2005). A61, c254
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The title compound, [Sn(C6H5)2(C12H11N4S2)Cl]·CH4O, is formed during the reaction between 2-acetyl­thia­zole 4-phenyl­thio­semicarbazone (Hacthptsc) and diphenyl­tin(IV) dichloride in methanol. In the crystal structure, the Sn atom exhibits an octa­hedral geometry with the [N2S] anionic tridentate thio­semicarbazone ligand having chloride trans to the central N and the two phenyl groups trans to each other. The Sn-Cl distance is 2.5929 (6), Sn-S is 2.4896 (6) and Sn-N to the central N is 2.3220 (16) Å. The MeOH mol­ecules link the Sn complexes into one-dimensional chains via N-H...O and O-H...Cl hydrogen bonds.

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Two 1.8 Å resolution crystal structures of the Ser205 mutant plasmepsin II from P. falciparum in complex with two Phe-Leu core inhibitors that incorporate tetrahedral transition-state mimetic hydroxypropylamine are described.

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Ca2CuO2Cl2 is the undoped parent compound of a high-temperature superconducting cuprate. Its crystal structure was re-refined from single-crystal X-ray diffraction data.


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The title compound, C8H9N3OS, crystallizes in a triclinic unit cell, with two crystallographically independent mol­ecules in the asymmetric unit. It has a two-dimensional layer structure with intermolecular hydrogen bonding.

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In the title compound, [Cd(C9H6NO2S2)(C12H8N2)2(H2O)]NO3·H2O, the Cd atom is coordinated by four N atoms [Cd-N = 2.376 (3)-2.394 (3)Å] and two O atoms [Cd-O = 2.240 (2)-2.274 (3)Å] in a distorted octa­hedral geometry. The crystal structure exhibits inter­molecular O-H...O hydrogen bonds and [pi]-[pi] stacking inter­actions.

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In the title complex, [Ni(C28H20Cl2N2O2)], the NiII atom exists in a square-planar environment, coordinated by four atoms from the tetradentate ligand. Molecules are held together by intermolecular C-H...O hydrogen bonds, which link the mol­ecules in a chain along the a axis.

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In the title complex, diaqua­bis(2-amino-3-methyl­butyrato-[kappa]2N,O)nickel(II), [Ni(C5H10NO2)2(H2O)2], the NiII atom (site symmetry 2) is octa­hedrally coordinated by two N,O-bidenate valinate ions and two water mol­ecules. A network of inter­molecular hydrogen bonds links the complex mol­ecules into a two-dimensional network.

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In the title complex, [Cu(C9H6NO2S2)2(C3H4N2)2], the CuII atom, lying on an inversion centre, is coordinated by two O atoms and two N atoms in a geometry deviating slightly from square planar. Inter­molecular hydrogen bonds link the complex mol­ecules into a layer structure.

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In the title compound, C13H10ClN3, the benzimidazole and chloropyridyl groups are planar and make a dihedral angle of 68.01 (18)°. There are two weak C-H...N hydrogen bonds, producing sheets parallel to (100).

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In the title compound, C14H10O4S2·2C3H7NO, the dithio­disalicylic acid is hydrogen bonded to dimethyl­formamide solvent mol­ecules. Within the dithio­disalicylic acid, the two benzene rings are nearly perpendicular to each other, with a dihedral angle of 77.77 (10)°.

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In the crystal structure of the title compound, C23H19NO2, the mol­ecular backbone is nearly planar, with a dihedral angle of 11.58 (12)° between the planes of the carbazole and benzene groups.

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The title compound, [CdI2(C12H8N2)2], consists of two 1,10-phenanthroline (phen) ligands, two I atoms and one Cd atom. The coordination geometry around the Cd atom, which lies on a twofold rotation axis, is slightly distorted octa­hedral. In the crystal structure, the dihedral angle between the two phen ligands is 89.03 (5)°. The crystal packing is stabilized by inter­molecular [pi]-[pi] inter­actions of phen rings, with a parallel distance of 3.362 Å, a centroid-centroid distance of 3.903 Å and a slip distance of 1.983 Å, and C-H...I hydrogen bonding [I...H = 3.091 and 2.990 Å].

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A new mixed-metal complex, [CuI(C12H8N2)2]2[CdI4], with an asymmetric unit consisting of one [CuI(phen)2]+ cation (phen = 1,10-phenanthroline) and half of a [CdI4]2- anion lying on a twofold rotation axis, has been synthesized. The Cu2+ ion in the [CuI(phen)2]+ cation is five-coordinated by two bidentate phenanthroline ligands and an iodide ligand. The crystal packing is stabilized by inter­molecular C-H...I hydrogen bonds.

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