scholarly journals Tetrakis(2,6-dimethylpyridinium) dihydrogen decavanadate dihydrate

2014 ◽  
Vol 70 (6) ◽  
pp. m225-m226 ◽  
Author(s):  
Erik Rakovský ◽  
Lukáš Krivosudský
Keyword(s):  
Hydrogen Bonds ◽  
Water Molecule ◽  
Title Compound ◽  
The Other ◽  
Inversion Symmetry ◽  
Asymmetric Unit ◽  
Axis Direction ◽  
Compound C ◽  
Supramolecular Chain

The structure of the title compound, (C7H10N)4[H2V10O28]·2H2O, was solved from a non-merohedrally twinned crystal (ratio of twin components ∼0.6:0.4). The asymmetric unit consists of one-half decavanadate anion (the other half completed by inversion symmetry), two 2,6-dimethylpyridinium cations and one water molecule of crystallization. In the crystal, the components are connected by strong N—H...O and O—H...O hydrogen bonds, forming a supramolecular chain along theb-axis direction. There are weak C—H...O interactions between the chains.

scholarly journals N,N′-(Ethane-1,2-diyl)bis(2-chlorobenzamide)

IUCrData ◽  
2016 ◽  
Vol 1 (7) ◽  
Author(s):  
U. Mohamooda Sumaya ◽  
D. Reuben Jonathan ◽  
E. R. A. Dravida Thendral ◽  
B. K. Revathi ◽  
G. Usha
Keyword(s):  
Hydrogen Bonds ◽  
Benzene Ring ◽  
Dihedral Angle ◽  
Title Compound ◽  
Amide Group ◽  
Inversion Symmetry ◽  
Asymmetric Unit ◽  
Axis Direction ◽  
Compound C ◽  
Two Component

The title compound, C16H14Cl2N2O2, crystallized with one half-molecule in the asymmetric unit; the whole molecule is generated by inversion symmetry, the center of inversion being situated at the middle of the bridging –CH2—CH2– bond. The dihedral angle between the amide group and the benzene ring is 52.4 (2)°. In the crystal, molecules are linked by two pairs of N—H...O hydrogen bonds forming a ladder-like structure propagating along thea-axis direction and enclosingR22(14) ring motifs. The compound was refined as a two-component twin [BASF = 0.18 (1)].

scholarly journals (1Z,2E)-N′-{2-Chloro-1-methyl-2-[2-(4-methylphenyl)hydrazin-1-ylidene]ethylidene}-4-methoxybenzohydrazide

2012 ◽  
Vol 68 (4) ◽  
pp. o926-o926 ◽  
Author(s):  
Hatem A. Abdel-Aziz ◽  
Hazem A. Ghabbour ◽  
Madhukar Hemamalini ◽  
Hoong-Kun Fun
Keyword(s):  
Hydrogen Bonds ◽  
Title Compound ◽  
The Other ◽  
Dihedral Angles ◽  
Asymmetric Unit ◽  
Torsion Angles ◽  
Axis Direction ◽  
Compound C ◽  
Benzene Rings

The asymmetric unit of the title compound, C18H19ClN4O2, contains two molecules, in which the dihedral angles between the benzene rings are 43.60 (12) and 58.65 (13)°. The hydrazine N atoms are twisted slightly out of the planes of the tolyl and methoxybenzene rings: the C—C—N—N and N—N—C—C torsion angles are 171.1 (2) and −174.4 (2)°, respectively, for one molecule and −177.4 (2) and −170.6 (2)°, respectively, for the other. In the crystal, molecules are linked by N—H...O and C—H...O hydrogen bonds into chains propagating along theb-axis direction.

scholarly journals 2,2′-[(E,E)-cis-(Cyclohexane-1,4-diyl)bis(nitrilomethanylylidene)]diphenol

2012 ◽  
Vol 68 (6) ◽  
pp. o1905-o1905 ◽  
Author(s):  
Shaaban K. Mohamed ◽  
Mehmet Akkurt ◽  
Muhammad N. Tahir ◽  
Antar A. Abdelhamid
Keyword(s):  
Hydrogen Bonds ◽  
Title Compound ◽  
The Other ◽  
Inversion Symmetry ◽  
Asymmetric Unit ◽  
Compound C

In the title compound, C20H22N2O2, the asymmetric unit contains two independent half-molecules, which are both completed by crystallographic inversion symmetry. The cyclohexane rings of both molecules adopt chair conformations; the N atoms are in equatorial orientations in one molecule and in axial orientations in the other. Both molecules feature two intramolecular O—H...N hydrogen bonds, which generate S(6) rings.

scholarly journals 2,3-Diphenyl-1,3-thiazolidin-4-one

2014 ◽  
Vol 70 (8) ◽  
pp. o847-o847 ◽  
Author(s):  
Hemant P. Yennawar ◽  
John Tierney ◽  
Lee J. Silverberg
Keyword(s):  
Hydrogen Bonds ◽  
Title Compound ◽  
Phenyl Ring ◽  
The Other ◽  
Chiral Molecule ◽  
Asymmetric Unit ◽  
Axis Direction ◽  
Envelope Conformation ◽  
Compound C ◽  
Thiazine Ring

The title compound, C15H13NOS, is a chiral molecule crystallized as a racemate, with two molecules in the asymmetric unit. In each of the molecules, the five-membered thiazine ring has an envelope conformation, with the S atom forming the flap. In one molecule, the angle between the two phenyl-ring planes is 82.77 (7)°, while in the other it is 89.12 (6)°. In the crystal, molecules are linked into chains along theb-axis direction by C—H...O hydrogen bonds.

scholarly journals 1,4-Bis(4H-1,2,4-triazol-4-yl)benzene dihydrate

2012 ◽  
Vol 68 (8) ◽  
pp. o2394-o2394
Author(s):  
Xiu-Guang Wang ◽  
Jian-Hui Li ◽  
Bin Ding ◽  
Gui-Xiang Du
Keyword(s):  
Hydrogen Bonds ◽  
Water Molecule ◽  
Title Compound ◽  
Three Dimensional ◽  
Triazole Ring ◽  
Water Molecules ◽  
Inversion Symmetry ◽  
Asymmetric Unit ◽  
Organic Species ◽  
Compound C

The asymmetric unit of the title compound, C10H8N6·2H2O, comprises half the organic species, the molecule being completed by inversion symmetry, and one water molecule. The dihedral angle between the 1,2,4-triazole ring and the central benzene ring is 32.2 (2)°. The water molecules form O—H...N hydrogen bonds with N-atom acceptors of the triazole rings. C—H...N hydrogen bonds are also observed, giving a three-dimensional framework.

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.

scholarly journals 2,2′-Bipyridin-1-ium hemioxalate oxalic acid monohydrate

IUCrData ◽  
2018 ◽  
Vol 3 (8) ◽  
Author(s):  
Błażej Dziuk ◽  
Anna Jezuita
Keyword(s):  
Hydrogen Bond ◽  
Hydrogen Bonds ◽  
Oxalic Acid ◽  
Water Molecule ◽  
Title Compound ◽  
Water Molecules ◽  
Asymmetric Unit ◽  
Compound C ◽  
Oxalic Acids

The asymmetric unit of the title compound, C10H9N2 +·0.5C2O4 2−·C2H2O4·H2O, consists of a 2,2′-bipyridinium cation, half an oxalate dianion, one oxalic acid and one water molecule. One N atom in 2,2′-bipyridine is unprotonated, while the second is protonated and forms an N—H...O hydrogen bond. In the crystal, the anions are connected with surrounding acid molecules and water molecules by strong near-linear O—H...O hydrogen bonds. The water molecules are located between the anions and oxalic acids; their O atoms participate as donors and acceptors, respectively, in O—H...O hydrogen bonds, which form sheets arranged parallel to the ac plane.

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.

scholarly journals 2-(1,3-Benzodioxol-5-yl)-1H-benzimidazole

2014 ◽  
Vol 70 (2) ◽  
pp. o157-o157
Author(s):  
Nadir Ghichi ◽  
Mohamed Amine Benaouida ◽  
Ali Benosmane ◽  
Ali Benboudiaf ◽  
Hocine Merazig
Keyword(s):  
Hydrogen Bonds ◽  
Benzene Ring ◽  
Title Compound ◽  
Ring System ◽  
The Other ◽  
Dihedral Angles ◽  
Asymmetric Unit ◽  
Compound C ◽  
The Mean ◽  
Independent Molecules

The asymmetric unit of the title compound, C14H10N2O2, contains two independent molecules. In each molecule, the benzodioxole ring system displays an envelope conformation, with the methylene C atom located at the flap deviating by 0.081 (2) and 0.230 (2) Å from the mean plane formed by the other atoms. The dihedral angles between the benzoimidazole ring system (all atoms) and the benzodioxole benzene ring are 15.35 (6) and 10.99 (7)°. In the crystal, molecules are linked by N—H...N hydrogen bonds into chains running along the [101].

N′-(4-Hydroxy-3-methoxybenzylidene)isonicotinohydrazide monohydrate

2007 ◽  
Vol 63 (3) ◽  
pp. o1119-o1120 ◽  
Author(s):  
Xue-Fang Shi ◽  
Lei He ◽  
Guo-Zhun Ma ◽  
Cui-Cui Yuan
Keyword(s):  
Hydrogen Bonds ◽  
Water Molecule ◽  
Title Compound ◽  
Crystal Packing ◽  
Asymmetric Unit ◽  
Solvent Water Molecule ◽  
Solvent Water ◽  
Compound C

The asymmetric unit of the title compound, C14H13N3O3·H2O, contains one molecule of N′-(4-hydroxy-3-methoxybenzylidene)isonicotinohydrazide and one solvent water molecule. The crystal packing is stabilized by O—H...N and O—H...O hydrogen bonds.

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