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216 citations found for Chen, W.

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Mol­ecules of the title compound, C18H16ClN3O3S, crystallize as centrosymmetric dimers, connected by inter­molecular N-H...O hydrogen bonds. The dimers are inter­linked via C-H...Cl hydrogen bonds.

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The title compound was prepared by the reaction of N,N'-diformylhydrazine and p-phenylenediamine. The X-ray analysis revealed that there is a hydrogen-bond chain composed of water molecules and 1,4-bis(4H-1,2,4-triazol-4-yl)benzene molecules in the crystal. The dihedral angle between the 1,2,4-triazole and substituted-benzene rings is 34.2(2)°.

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Acta Cryst. (2008). A64, C162
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The cadmium cations (coordination number seven) are linked by hy­droxy­propano­ate anions into a three-dimensional network.


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Crystals of the Grb2 SH2 domain in complex with a phosphotyrosyl peptide corresponding to residues 921-930 of focal adhesion kinase (FAK) have been obtained using the sitting-drop vapour-diffusion technique. Data have been collected to 2.49 Å resolution.

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The Au atom in the title compound, [AuCl{(C6F5)3P}], exists within a P and Cl donor set that constitutes a linear geometry. There are two independent mol­ecules in the asymmetric unit; the Au-P and Au-Cl bond lengths and the P-Au-Cl angle are 2.2060 (9), 2.2688 (9) Å and 172.68 (3)°, respectively, for mol­ecule 1 and 2.2149 (9) 2.2706 (9) Å and 176.54 (3)°, respectively, for mol­ecule 2.

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In the title mol­ecule, C17H12F2O3, the dihedral angle between the benzene rings is 8.6 (2)°. In the crystal, two pairs of O-H...O hydrogen bonds connect the mol­ecules into inversion dimers. In addition, weak C-H...F hydrogen bonds link the dimers into a two-dimensional network parallel to (10-4). The carbonyl O atom is an acceptor for two weak intra­molecular hydrogen bonds.

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The asymmetric unit of the title compound, [Ni2(C25H31N4O3)(C2H3O2)2]PF6·0.5H2O, consists of two dinuclear nickel cations, two hexa­fluoro­phosphate anions and one water mol­ecule of crystallization. Within each cation, the Ni atoms are bridged by two exogenous acetate groups and an endogenous cresol O atom of a phenolate-based `end-off' compartmental ligand that possesses two pendant chelating arms attached to the ortho positions of the phenol ring. Each Ni atom is six-coordinate with a slightly distorted octa­hedral geometry. The two symmetry-independent cations are linked into a dimeric unit through O-H...O hydrogen bonds. Additional O-H...O, C-H...F and C-H...O inter­molecular inter­actions link all of the units in the structure into a three-dimensional framework.

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In the title compound, C18H21N2O6P, the dihedral angle between the benzene and phenyl rings is 85.1 (2)°. In the crystal, mol­ecules are linked via pairs of N-H...O(=P) hydrogen bonds, forming inversion dimers with graph-set notation R22(10). One of the ethyl groups is disordered over two sets of sites, with occupancies 0.746 (11) and 0.254 (11).

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Using synchrotron radiation nano-computed tomography, the three-dimensional structures of micro-voids in 1,3,5-tri­amino-2,4,6-tri­nitro­benzene crystals were obtained with high spatial resolution and excellent imaging contrast, and then the development of the voids was followed in situ under different compressive strains.

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The asymmetric unit of the title compound, C11H12N2O4S2, contains two independent mol­ecules with similar dihedral angles of 76.7 (1) and 77.3 (1)° between the mean planes of the five- and six-membered rings. In both mol­ecules, the amino groups are involved in intra­molecular N-H...O hydrogen bonds. In the crystal structure, weak inter­molecular C-H...O hydrogen bonds link mol­ecules into ribbons extended along the a axis.


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In the title complex, [Sn(CH3)2(C12H8N2O2S)], the Sn atom is in a distorted trigonal-bipyramidal configuration, with Sn-O distances in the range 2.087 (3)-2.177 (3) Å. The Schiff base mol­ecule is coordinated to the Sn atom in a tridentate fashion via the azomethine N atom, the hydroxy O atom and the carbonyl O atom.

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In the title complex, [Sn(C6H5)2(C17H11N3O2)], the Sn atom is in a distorted trigonal-bipyramidal geometry, with Sn-O distances in the range 2.074 (3)-2.141 (3) Å. The dihedral angles between the two chelated benzene rings and the O(naphthyl oxide)-Sn-N group are 75.8 (1) and 50.6 (3)°.

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In the mol­ecule of the title complex, [Sn(CH3)2(C13H10N2O3S)], the Sn atom is in a distorted trigonal-bipyramidal geometry. There are two mol­ecules in the asymmetric unit. A centrosymmetric arrangement leads to an Sn2O2 core through weak Sn...O inter­actions and causes the formation of a dimer. Inter­molecular C-H...O hydrogen bonds seem to be effective in the stabilization of the crystal structure.

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In the title complex, [Sn(C4H9)(C17H11N3O2)Cl2]·2CH4O, the Sn atom is in a distorted octa­hedral geometry, with Sn—O distances of 2.093 (3) and 2.125 (3) Å. The tridentate Schiff base coordinates to the Sn via the azomethine N atom, the hydroxyl O atom and the carbonyl O atom. The complex is stabilized by intra­molecular O—H...O hydrogen bonds, forming a one-dimensional chain.

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The crystal structure of the title compound, C14H14ClN3O3+·Cl-·0.5H2O, exhibits O-H...O, C-H...O, C-H...Cl, N-H...Cl and O-H...Cl hydrogen bonds. The chloride anions participate in extensive hydrogen bonding with the aminium cations and link mol­ecules through multiple N-H+...Cl- inter­actions.

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The title compound, C12H21NO3, is an important inter­mediate for new dopamine transporter inhibitors. The six-membered ring of the aza­bicyclo­[3.2.1]octane system adopts a chair conformation with the hydroxyl group axial. The fused five-membered ring is in an envelope conformation.

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In the mol­ecular structure of the title complex, [Sn(CH3)2(C17H11N3O2)]·CH3OH, the Sn atom is in a distorted trigonal–bipyramidal coodination, with Sn—O distances of 2.099 (6) and 2.128 (6) Å. A methanol solvent mol­ecule is O—H...N hydrogen bonded to the complex mol­ecule.

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