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.

Ornidazole hemihydrate

2007 ◽  
Vol 63 (11) ◽  
pp. o4204-o4204 ◽  
Author(s):  
Liping Deng ◽  
Wei Wang ◽  
Jianguo Lv
Keyword(s):  
Crystal Structure ◽  
Hydrogen Bonds ◽  
Title Compound ◽  
Water Molecules ◽  
Asymmetric Unit ◽  
Intermolecular Hydrogen Bonds ◽  
Compound C ◽  
Independent Molecules

The asymmetric unit of the racemic title compound, C7H10ClN3O3·0.5H2O, has two independent molecules of ornidazole. The crystal structure is formed via intermolecular hydrogen bonds involving the water molecules.

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 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.

N-Benzoyl-N′-(tert-butylaminocarbonyl)thiourea

2006 ◽  
Vol 62 (7) ◽  
pp. o2700-o2701 ◽  
Author(s):  
Chuan-Wen Sun ◽  
Xiao-Dong Zhang
Keyword(s):  
Crystal Structure ◽  
Hydrogen Bonds ◽  
Title Compound ◽  
Asymmetric Unit ◽  
Intermolecular Hydrogen Bonds ◽  
Compound C ◽  
Planar Conformation

The asymmetric unit of the title compound, C13H17N3O2, contains two molecules and neither of them adopts a planar conformation. The crystal structure is stabilized by the intermolecular N—H...O and intramolecular N—H...O and N—H...S hydrogen bonds. The intermolecular hydrogen bonds link the molecules to form infinite chains along the b axis.

scholarly journals 4-(2,3-Dichlorophenyl)piperazin-1-ium picrate

IUCrData ◽  
2021 ◽  
Vol 6 (4) ◽  
Author(s):  
Udhayasuriyan Sathya ◽  
Jeyaraman Selvaraj Nirmal Ram ◽  
Sundaramoorthy Gomathi ◽  
Shyamaladevi Ramu ◽  
Samson Jegan Jennifer ◽  
...  
Keyword(s):  
Crystal Structure ◽  
Hydrogen Bonds ◽  
Title Compound ◽  
Supramolecular Interactions ◽  
Supramolecular Architecture ◽  
Asymmetric Unit ◽  
Compound C

The title compound, C6H2N3O7 −·C10H13Cl2N2 +, crystallizes with one 1-(2,3-dichloro-phenyl)piperazine (DP) cation and one picrate (PA) anion in the asymmetric unit. In the crystal structure, the DP cation and PA anion are interconnected via several N—H...O and C—H...O hydrogen bonds. The DP cation and PA anion are further connected through C—Cl...π [3.8201 (4), 3.7785 (4) Å] and N—O...π [3.7814 (4) Å] interactions. The DP cations are further interconnected via a weak intermolecular Cl...Cl [3.2613 (4) Å] halogen–halogen interaction. The combination of these supramolecular interactions leads to a herringbone like supramolecular architecture.

4-Amino-6-phenyl-3-thioxo-2,3-dihydro-1,2,4-triazin-5(4H)-one

2006 ◽  
Vol 62 (7) ◽  
pp. o2702-o2704
Author(s):  
Ray J. Butcher ◽  
H. S. Yathirajan ◽  
H.G. Anilkumar ◽  
B.V. Ashalatha ◽  
B. Narayana
Keyword(s):  
Crystal Structure ◽  
Hydrogen Bonds ◽  
Title Compound ◽  
Triazine Ring ◽  
Asymmetric Unit ◽  
Intermolecular Hydrogen Bonds ◽  
Compound C

The title compound C9H8N4OS, crystallizes with two molecules in the asymmetric unit. The crystal structure is stabilized by intermolecular hydrogen bonds between the protonated N atom of the triazine ring and the carbonyl O atom of an adjacent triazine ring, forming chains running parallel to the a axis.

scholarly journals Crystal structure of 4,4′,4′′-(1,3,5-triazine-2,4,6-triyl)tripyridinium trichloride 2.5-hydrate

2015 ◽  
Vol 71 (11) ◽  
pp. o858-o859
Author(s):  
Bo-Kai Ling ◽  
Xiao-Long Feng ◽  
Yang Li ◽  
Tian-Gang Luan
Keyword(s):  
Crystal Structure ◽  
Hydrogen Bonds ◽  
Title Compound ◽  
Three Dimensional ◽  
Organic Cations ◽  
Water Molecules ◽  
Supramolecular Architecture ◽  
Asymmetric Unit ◽  
Compound C ◽  
Centroid Distance

The asymmetric unit of the title compound, C18H15N63+·3Cl−·2.5H2O, contains two independent (1,3,5-triazine-2,4,6-triyl)tripyridinium cations. Both cations are approximately planar, the r.m.s. deviations of fitted non-H atoms being 0.045 and 0.051 Å. In the crystal, extensive O—H...Cl, O—H...O, N—H...Cl and N—H...O hydrogen bonds and weak C—H...Cl and C—H...O interactions link the organic cations, Cl−anions and water molecules into a three-dimensional supramolecular architecture. π–π stacking between the pyridine rings of adjacent cations is also observed, the centroid-to-centroid distance being 3.7578 (8) Å.

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 2,6-Bis(4-methoxybenzylidene)cyclohexanone

2006 ◽  
Vol 62 (5) ◽  
pp. o1910-o1912 ◽  
Author(s):  
Ray J. Butcher ◽  
H. S. Yathirajan ◽  
B. K. Sarojini ◽  
B. Narayana ◽  
J. Indira
Keyword(s):  
Crystal Structure ◽  
Hydrogen Bonds ◽  
Title Compound ◽  
Photon Absorption ◽  
Intermolecular Hydrogen Bonds ◽  
Two Photon Absorption ◽  
Two Photon ◽  
Compound C ◽  
Centrosymmetric Dimers

The title compound, C22H22O3, demonstrates a two-photon absorption. Its metrical parameters are similar to those of related cyclohexanone derivatives. In the crystal structure, two sets of centrosymmetric dimers formed by weak C—H...O intermolecular hydrogen bonds combine to form molecular tapes along [101].

scholarly journals Crystal structure of tetraethyl 27,30-dioxo-7,12,20,25-tetra-tert-butyl-3,16-dioxa-9,22,28,31-tetrathiaheptacyclo[21.3.1.11,5.14,8.110,14.114,18.117,21]dotriaconta-4,6,8(29),10,12,17,19,21(32),23,25-decaene-2,2,15,15-tetracarboxylate

2015 ◽  
Vol 71 (10) ◽  
pp. o778-o779
Author(s):  
Mehmet Akkurt ◽  
Jerry P. Jasinski ◽  
Shaaban K. Mohamed ◽  
Omran A. Omran ◽  
Mustafa R. Albayati
Keyword(s):  
Crystal Structure ◽  
Hydrogen Bonds ◽  
Title Compound ◽  
Membered Ring ◽  
Asymmetric Unit ◽  
Axis Direction ◽  
Tert Butyl ◽  
Envelope Conformation ◽  
Compound C ◽  
A Chain

The asymmetric unit of the title compound, C54H64O12S4, consists of one half of the molecule, which is located on an inversion centre. The heterocyclic six-membered ring adopts a distorted envelope conformation with the spiro C atom as the flap. In the crystal, molecules are linked by weak C—H...O hydrogen bonds with anR22(14) motif, forming a chain along theb-axis direction.

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