Newsletter

search results

results of search on CRYSTALLOGRAPHY JOURNALS ONLINE

326 citations found for Qin,

Search for Qin, in the World Directory of Crystallographers

Select bibliographic records for downloading using the checkboxes or select all button

Results 1 to 20, sorted by name:


Download citation
Download citation

link to html
The title compound, C10H24N2O2, was synthesized by N-alkyl­ation of 1,2-dichloro­ethane with racemic 2-amino-1-butanol. The mol­ecule lies on a crystallographic inversion center and the crystal structure is stabilized by inter­molecular O-H...N and N-H...O hydrogen bonds.

Download citation
Download citation

link to html
The title compound, C21H21NO4S, is the key inter­mediate in the synthesis of tazobactam. The crystal structure is stabilized by inter­molecular C-H...O hydrogen bonds.

Download citation
Download citation

link to html
The title compound, C10H26N2O22+·C2O22-·5H2O, is the oxalate salt of the drug ethambutol. Both the ethambutol cation and the oxalate anion lie about a crystallographic twofold axis which bis­ects the central C-C bonds of both ions. The O atom of one solvent water mol­ecule also lies on a twofold axis. The crystal structure is stabilized by inter­molecular O-H...N and N-H...O hydrogen bonds.

Download citation
Download citation

link to html
The title compound, C23H22N4O5S, is the key inter­mediate for the synthesis of tazobactam, a widely used [beta]-lacta­mase inhibitor. The crystal structure is stabilized by inter­molecular O-H...N and N-H...O hydrogen bonds.

Download citation
Download citation

link to html
During our research into novel nonlinear optical materials using 1,10-phenanthroline as an appending ligand on lanthanide iodates, crystals of an infinite layered DyIII iodate compound, Dy(IO3)3(H2O)·H2O, were obtained under hydro­thermal conditions. The DyIII cation has a dicapped trigonal prismatic coordination environment consisting of one water O atom and seven other O atoms from seven iodate anions. These iodate anions bridge the DyIII cations into a two-dimensional structure. Through O-H...O hydrogen bonds, all of these layers stack along [111], giving a supra­molecular channel, with the solvent water mol­ecules filling the voids.

Download citation
Download citation

link to html
In the title compound, C18H12N2O2, the carbazole ring system is essentially planar and makes a dihedral angle of 53.08 (4)° with the plane of the nitro­benzene ring. In the crystal structure, inversion-related mol­ecules form a C-H...O hydrogen-bonded dimer.

Download citation
Download citation

link to html
In the title compound, [Ir2(C16H13N2O3)4Cl2]·2CH2Cl2, the two Ir atoms, 3.7075 (6) Å apart, are bridged by two Cl atoms which straddle a twofold axis of rotation through the two Ir atoms. Each Ir centre resides in a distorted octa­hedral environment completed by two chelating 2,5-bis­(4-methoxy­phenyl)-1,3,4-oxadiazole ligands, with trans-N-N and cis-C-C dispositions. In the stacking structure, there are two types of hydrogen bonds, involving the meth­oxy substitutent, an N atom of the oxadiazole ring and the dichloro­methane solvent mol­ecules.

Download citation
Download citation

link to html
In the title compound, C16H11NO3, the quinolin-8-yl­oxy and 2-carboxy­phenyl groups are linked through an ether O atom, the angle at this atom being 116.4 (1)° in one mol­ecule and 114.8 (1)° in the other independent mol­ecule. In both mol­ecules, the carboxylic acid group inter­acts with the heterocyclic moiety through an intra­molecular hydrogen bond.

Download citation
Download citation

link to html
The title compound, [ZnCl2(bpp)]n (where bpp is 1,3-di-4-pyridyl­propane, C13H14N2), has been prepared by the hydro­thermal reaction of ZnCl2 and bpp at 433 K. The Zn, Cl and central propyl C atom lie on the mirrors of the P21/m space group. The molecular structure shows a weave-like polymeric chain. Each Zn atom is coordinated by two N atoms and two Cl atoms in a distorted tetrahedral geometry, with the Zn-N distance being 2.055 (5) Å and the Zn-Cl distances being 2.239 (3) and 2.247 (2) Å.

Download citation
Download citation

link to html
The title compound, [(C2H5)4N][Mo3Cl6O(C2H3O2)3], has been synthesized by the reaction of MoCl3·3H2O with CH3COOH. The structure is a polymorph of the structure reported by Chen, Lu, Huang, Huang & Huang [Chin. J. Struct. Chem. (1993). 12, 117-123]. The crystal contains discrete cations and anions. The mono-oxo-capped trinuclear Mo cluster anion consists of three Cl atoms and three acetate groups that bridge the three edges of the Mo triangle; each Mo atom is also coordinated by one terminal Cl atom. The coordination around Mo is a distorted octahedron.

Download citation
Download citation

link to html
The title compound, [Ag2(NO3)2(C5H5NS)]n, was obtained from the reaction of silver nitrate with bis(4-pyridyl) disufide (4-PDS) in a mixture of ethanol and water, which suggests that the di­sulfide bond of 4-PDS can be cleaved under mild conditions. The structure of the title compound is a two-dimensional infinite array in which the asymmetric unit contains two Ag atoms, a pyridinium-4-thiol­ate mol­ecule and two nitrate groups. Each pyridinium-4-thiol­ate mol­ecule acts as a [mu]4 bridge, linking four Ag atoms, with Ag-S bond distances of 2.4870 (19), 2.5791 (19), 2.5992 (19) and 2.848 (2) Å. The Ag...Ag distances lie in the range 2.889 (2)-3.049 (1) Å.

Download citation
Download citation

link to html
The title compound, C10H11Cl2NO2, consists of a benzene core functionalized by one nitro group, two methyl groups, and two chloro­methyl groups. The crystal structure is stabilized by inter­molecular C-H...O non-classical hydrogen bonds and weak C-H...Cl inter­actions.

Download citation
Download citation

link to html
The title compound, C33H28IN5O6, is a mol­ecular clip based on the glycoluril framework. A 4-pyridinylethynyl-substituted benzene ring is fused to one seven-membered ring, which binds two of the N atoms from separate rings of the glycoluril system. The second, similar, seven-membered ring is fused to an iodo­benzene ring. The orientation of these fused-benzene-ring substituents is trans with respect to the glycouril framework. The crystal structure is stabilized by weak C-H...O and C-H...N hydrogen bonds and C-H...[pi] inter­actions.

Download citation
Download citation

link to html
In the title complex, [PdCl2(C13H14N2O2)], the central PdII atom is bonded to two pyridine N atoms and two terminal Cl atoms. The coordination geometry of the Pd atom is square planar with a slight tetrahedral distortion. The two Pd-N distances are 2.029 (3) and 2.057 (3) Å, and the N-Pd-N angle is 86.56 (13)°. The Pd-Cl distances are 2.2929 (11) and 2.2959 (11) Å, and the Cl-Pd-Cl angle is 90.84 (5)°.

Download citation
Download citation

link to html
In an effort to discover novel and potential boron-dipyrromethene (BODIPY) dyes, the title compound, C19H18BF2N3O2, was prepared from 2,4-dimethyl­pyrrole, 4-nitro­benzaldehyde and BF3·Et2O in a one-pot reaction. There are two independent mol­ecules, A and B, in the asymmetric unit in which the dihedral angles between the benzene ring and boron-dipyrromethene mean plane have significantly different values [82.71 (8)° for mol­ecule A and 73.16 (8)° for mol­ecule B]. Inter­molecular C-H...[pi] inter­actions help to stabilize the crystal structure.

Download citation
Download citation

link to html
In the title compound, C12H10F3N3O2, the dihedral angle between the phenyl and pyrazole rings is 96.6 (3)°. In the crystal, pairs of O-H...N hydrogen bonds link the mol­ecules, forming inversion dimers. Weak inter­molecular C-H...F hydrogen bonds are also observed.

Download citation
Download citation

link to html
In the title compound, C19H15N3OS, the 2-(cyano­imino)thia­zolidine unit is approximately planar and makes dihedral angles of 63.74 (13) and 68.56 (15)° with the plane of the benzoyl C atoms and the benzylidene phenyl ring, respectively. In the crystal structure, a weak inter­molecular C-H...O inter­action is observed.

Download citation
Download citation

link to html
In the title compound, C19H15N3OS, the 2-(cyano­imino)thia­zolidine unit is approximately planar and makes dihedral angles of 63.74 (13) and 68.56 (15)° with the plane of the benzoyl C atoms and the benzylidene phenyl ring, respectively. In the crystal structure, a weak inter­molecular C-H...O inter­action is observed.

Download citation
Download citation

link to html
The crystal structure of the title compound, diferrocenium bis{bis[1,2-dimercaptoethene-1,2-dicarbonitrilato(2-)-S,S']- nickel(III)} ferrocene, is a 2:3 complex of [Ni{C2S2(CN)2}2] and [Fe(C5H5)2]. The structural data suggest that the formula for this compound can be written as [Fe(C5H5)2]2[Ni{C2S2(CN)2}2]2.[Fe(C5H5)2].

Download citation
Download citation

link to html
Borrelia burgdorferi β-barrel assembly machinery A (BbBamA) is an essential translocator located in the outer membrane. The N-terminal periplasmic polypeptide-transport-associated (POTRA) domains of BbBamA are vital for assembly of the BAM complex. Here, the production, crystallization and initial X-ray crystallographic analysis of the three N-terminal POTRA domains of BbBamA (BbBamA-POTRA P1–P3) are reported.

Follow IUCr Journals
Sign up for e-alerts
Follow IUCr on Twitter
Follow us on facebook
Sign up for RSS feeds