scholarly journals Tetrakis(4-chloroanilinium) hexachloridostannate(IV) dichloride

2012 ◽  
Vol 68 (6) ◽  
pp. m782-m782 ◽  
Author(s):  
Benhua Zhou ◽  
Hongxia Liu
Keyword(s):  
Hydrogen Bonds ◽  
Title Compound ◽  
Rotation Axis ◽  
Asymmetric Unit ◽  
Special Position ◽  
Compound C ◽  
Octahedral Environment

The asymmetric unit of the title compound, (C6H7ClN)4[SnCl6]Cl2, comprises two 4-chloroanilinium cations, half of an [SnCl6]2− anion and a Cl− anion. The SnIV atom, located on a special position on a twofold rotation axis, exhibits an octahedral environment. In the crystal, molecules are linked by N—H...Cl hydrogen bonds between the 4-chloroanilinium cations, [SnCl6]2− anions and Cl− anions.

2,5-Dibromopyridinium hexabromidostannate(IV)

2007 ◽  
Vol 63 (3) ◽  
pp. m892-m894 ◽  
Author(s):  
Basem Fares Ali ◽  
Rawhi Al-Far
Keyword(s):  
Crystal Structure ◽  
Hydrogen Bonds ◽  
Title Compound ◽  
Rotation Axis ◽  
Supramolecular Architecture ◽  
Asymmetric Unit ◽  
Intermolecular Hydrogen Bonds ◽  
Compound C ◽  
Distorted Octahedral

The asymmetric unit of the title compound, (C5H4Br2N)2[SnBr6], contains one cation and one half-anion. The anion exhibits a distorted octahedral arrangement about the Sn atom, which lies on a crystallographic twofold rotation axis. In the crystal structure, intermolecular hydrogen bonds and short Br...Br interactions cause the formation of a supramolecular architecture, in which they may be effective in the stabilization of the structure.

scholarly journals A neutral cubane with a ZnII4O4core: tetrabenzoatotetrakis(μ3-hydroxydi-2-pyridylmethanolato)tetrazinc(II)–acetone–methanol (1/2/1)

2009 ◽  
Vol 65 (6) ◽  
pp. m658-m659 ◽  
Author(s):  
Dong Hoon Shin ◽  
Sim-Hee Han ◽  
Pan-Gi Kim ◽  
Cheal Kim ◽  
Youngmee Kim
Keyword(s):  
Hydrogen Bonds ◽  
Title Compound ◽  
Rotation Axis ◽  
Solvent Molecule ◽  
Asymmetric Unit ◽  
Distorted Octahedral Environment ◽  
Octahedral Environment ◽  
Distorted Octahedral ◽  
Type Bond

In the title compound, [Zn4(C11H9N2O2)4(C7H5O2)4]·2(CH3)2CO·CH3OH, the tetranuclear molecule lies on a fourfold inversion axis. ZnIIions and μ3-O atoms in the cubane core occupy alternating vertices, forming two interpenetrating tetrahedra. Each ZnIIion is further coordinated by two N atoms from two different (py)2C(OH)O ligands (py is pyridyl) and one O atom from a monodentate benzoate ligand, forming a distorted octahedral environment. The (py)2C(OH)O ligand acts in an η1:η3:η1:μ3manner, forming two five-membered ZnNCCO chelating rings with two different ZnIIatoms sharing a common C—O bond, and an alkoxide-type bond to a third ZnIIion. There are four symmetry-related intramolecular O—H...O hydrogen bonds between the two types of ligands. In the asymmetric unit, there is a half-occupancy acetone solvent molecule and a half-occupancy methanol solvent molecule that lies on a twofold rotation axis.

scholarly journals Crystal structure of 1,1′-[imidazolidine-1,3-diylbis(methylene)]bis(naphthalen-2-ol)

2015 ◽  
Vol 71 (3) ◽  
pp. 258-260 ◽  
Author(s):  
Augusto Rivera ◽  
Jicli José Rojas ◽  
Jaime Ríos-Motta ◽  
Michael Bolte
Keyword(s):  
Crystal Structure ◽  
Hydrogen Bonds ◽  
Title Compound ◽  
Rotation Axis ◽  
Asymmetric Unit ◽  
Compound C ◽  
Twist Conformation ◽  
Ring Motif

The crystal structure of the title compound, C25H24N2O2, at 173 K has monoclinic (C2/c) symmetry. The molecule is located on a crystallographic twofold rotation axis with only half a molecule in the asymmetric unit. The imidazolidine ring adopts a twist conformation, with a twist about the ring C—C bond. The crystal structure shows theanticlinaldisposition of the two (2-hydroxynaphthalen-1-yl)methyl substituents of the imidazolidine ring. The structure displays two intramolecular O—H...N hydrogen bonds, each forming anS(6) ring motif.

scholarly journals rac-1,1,1,6,6,6-Hexachlorohex-3-yne-2,5-diol hemihydrate

IUCrData ◽  
2017 ◽  
Vol 2 (8) ◽  
Author(s):  
Heiner Detert ◽  
Dieter Schollmeyer
Keyword(s):  
Hydrogen Bonds ◽  
Water Molecule ◽  
Title Compound ◽  
Rotation Axis ◽  
Water Molecules ◽  
Asymmetric Unit ◽  
Compound C ◽  
Centrosymmetric Dimers

The asymmetric unit of the title compound, C6H4Cl6O2·0.5H2O, contains one molecule of 1,1,1,6,6,6-hexachlorohex-3-yne-2,5-diol and half a water molecule located on a twofold rotation axis. In the crystal, pairs of hexachlorohexynediol molecules form centrosymmetric dimers connectedviapairwise O—H...O hydrogen bonds. These dimers are connected by water molecules, resulting in layers parallel to theabplane.

scholarly journals 7,7′,8,8′-Tetramethoxy-4,4′-dimethyl-3,3′-bicoumarin

2009 ◽  
Vol 65 (6) ◽  
pp. o1294-o1295
Author(s):  
Hoong-Kun Fun ◽  
Samuel Robinson Jebas ◽  
Mehtab Parveen ◽  
Zakia Khanam ◽  
Raza Murad Ghalib
Keyword(s):  
Crystal Structure ◽  
Hydrogen Bonds ◽  
Dihedral Angle ◽  
Title Compound ◽  
Rotation Axis ◽  
The Other ◽  
Asymmetric Unit ◽  
Compound C ◽  
Related Part ◽  
Methoxy Groups

In the crystal structure, the title compound, C24H22O8, lies on a twofold rotation axis and the asymmetric unit comprises one half-molecule. The dihedral angle formed by the coumarin unit with the symmetry-related part is 74.78 (14)°. One of the methoxy groups attached to the coumarin unit is considerably twisted, making an angle of 87.17 (17)° with respect to the coumarin unit; the other is twisted by 0.66 (19)°. No classical hydrogen bonds are found in the sturcture; only a weak C—H...π interaction and short intramolecular O...O contacts [2.683 (2)–2.701 (2) Å] are observed.

scholarly journals DimethylN-cyanodithioiminocarbonate

IUCrData ◽  
2016 ◽  
Vol 1 (3) ◽  
Author(s):  
Mouhamadou Birame Diop ◽  
Libasse Diop ◽  
Allen G. Oliver
Keyword(s):  
Hydrogen Bonds ◽  
Title Compound ◽  
Triple Bond ◽  
Rotation Axis ◽  
Single Bond ◽  
Asymmetric Unit ◽  
Mean Values ◽  
Compound C ◽  
The Mean ◽  
Independent Molecules

The title compound, C4H6N2S2, crystallizes with four independent molecules in the asymmetric unit. Two of the molecules are disordered about a pseudo twofold rotation axis. The mean values of the C—N bonds are 1.143 (5) Å for C[triple-bond]N, 1.302 (5) Å for C=N and 1.341 (5) Å for the C—N single bond. In the crystal, molecules are linkedviaC—H...N hydrogen bonds, forming slabs parallel to thebcplane.

scholarly journals 2,2′-{1,1′-[Pentane-1,5-diylbis(oxynitrilo)]diethylidyne}di-1-naphthol

2009 ◽  
Vol 65 (6) ◽  
pp. o1238-o1238 ◽  
Author(s):  
Yin-Xia Sun ◽  
Jian-Chao Wu ◽  
Wen-Kui Dong ◽  
Shang-sheng Gong ◽  
Jun-Feng Tong
Keyword(s):  
Hydrogen Bonds ◽  
Dihedral Angle ◽  
Title Compound ◽  
Rotation Axis ◽  
Oxime Group ◽  
Asymmetric Unit ◽  
Naphthalene Ring ◽  
Compound C ◽  
Axis Passing

The title compound, C29H30N2O4, adopts a distortedZconfiguration with respect to the oxime group, which is almost coplanar with the adjacent naphthalene ring [dihedral angle = 4.11 (2)°]. There is one half-molecule in the asymmetric unit, with a crystallographic twofold rotation axis passing through the central C atom of the –CH=N—O-(CH)5—O—N=CH– bridge. Within the molecule, the dihedral angle formed by the two naphthalene rings is 79.08 (3)°, and there are two intramolecular O—H...N hydrogen bonds.

scholarly journals Powder study of 3-azabicyclo[3.3.1]nonane-2,4-dione form 2

2006 ◽  
Vol 62 (7) ◽  
pp. o3046-o3048 ◽  
Author(s):  
Ashley T Hulme ◽  
Philippe Fernandes ◽  
Alastair Florence ◽  
Andrea Johnston ◽  
Kenneth Shankland
Keyword(s):  
Crystal Structure ◽  
Simulated Annealing ◽  
Hydrogen Bonds ◽  
Powder Diffraction ◽  
Title Compound ◽  
Variable Temperature ◽  
Polycrystalline Sample ◽  
Asymmetric Unit ◽  
X Ray ◽  
Compound C

A polycrystalline sample of a new polymorph of the title compound, C8H11NO2, was produced during a variable-temperature X-ray powder diffraction study. The crystal structure was solved at 1.67 Å resolution by simulated annealing from laboratory powder data collected at 250 K. Subsequent Rietveld refinement yielded an R wp of 0.070 to 1.54 Å resolution. The structure contains two molecules in the asymmetric unit, which form a C 2 2(8) chain motif via N—H...O hydrogen bonds.

scholarly journals Piperazinium hydrogenarsenate monohydrate

2007 ◽  
Vol 63 (3) ◽  
pp. m905-m907 ◽  
Author(s):  
Hazel S. Wilkinson ◽  
William T. A. Harrison
Keyword(s):  
Hydrogen Bonds ◽  
Water Molecule ◽  
Title Compound ◽  
Water Molecules ◽  
Asymmetric Unit ◽  
Compound C

In the title compound, C4H12N2 2+·HAsO4 2−·H2O, the component species interact by way of N—H...O and O—H...O hydrogen bonds, the latter leading to infinite sheets of HAsO4 2− anions and water molecules containing R 6 6(18) loops. The asymmetric unit contains one anion, one water molecule and half each of two centrosymmetric cations.

Ethylammonium saccharinate

2006 ◽  
Vol 62 (5) ◽  
pp. o1800-o1801
Author(s):  
Zi-Liang Wang ◽  
Lin-Heng Wei ◽  
Ming-Xue Li ◽  
Jing-Ping Wang
Keyword(s):  
Hydrogen Bonds ◽  
Title Compound ◽  
Crystal Packing ◽  
Two Dimensional ◽  
Asymmetric Unit ◽  
Framework Structure ◽  
Compound C

The asymmetric unit of the title compound, C2H8N+·C7H4NO3S−, contains a saccharinate anion and a protonated ethylamine cation. Intermolecular N—H...O hydrogen bonds link these ions into a two-dimensional framework structure. The crystal packing is further stabilized by weak intermolecular C—H...O hydrogen bonds

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