Bis{4-[2-(2-hydroxyphenyl)ethyleneamino]phenyl} ether

2006 ◽  
Vol 62 (5) ◽  
pp. o2056-o2058
Author(s):  
Şerife Pınar ◽  
Mehmet Akkurt ◽  
Ali Asghar Jarrahpour ◽  
Shadab Rezaei ◽  
Orhan Büyükgüngör
Keyword(s):  
Crystal Structure ◽  
Hydrogen Bonding ◽  
Title Compound ◽  
Phenyl Ether ◽  
Asymmetric Unit ◽  
Bond Lengths ◽  
Compound C

In the title compound, C28H24N2O3, the two molecules in the asymmetric unit have different conformations about the ether bonds. The bond lengths and angles of the two molecules are nearly identical. The crystal structure is stabilized by intramolecular O—H...N and intermolecular C—H...O hydrogen bonding.

2,4,6-Trimethylpyridine-3,5-dicarbonitrile

2006 ◽  
Vol 62 (7) ◽  
pp. o2765-o2767
Author(s):  
Hong-Li Wang ◽  
Bin Zhang ◽  
Yi Dai
Keyword(s):  
Crystal Structure ◽  
Hydrogen Bonding ◽  
Title Compound ◽  
Asymmetric Unit ◽  
Compound C ◽  
Hydrogen Bonding Interactions

The title compound, C10H9N3, is essently planar, except for the methyl H atoms. The asymmetric unit consists of two molecules. In the crystal structure, weak intramolecular C—H...N hydrogen-bonding interactions occur, linking the molecules into chains propagating along the a axis.

3-n-Butyl-2-methoxy-1-benzothieno[3,2-d]pyrimidin-4(3H)-one

2006 ◽  
Vol 62 (4) ◽  
pp. o1319-o1320 ◽  
Author(s):  
Min-Hui Cao ◽  
Sheng-Zhen Xu ◽  
Yang-Gen Hu
Keyword(s):  
Crystal Structure ◽  
Hydrogen Bonding ◽  
Benzene Ring ◽  
Title Compound ◽  
Thiophene Ring ◽  
Stacking Interactions ◽  
Asymmetric Unit ◽  
Compound C ◽  
Π Stacking ◽  
Independent Molecules

The title compound, C15H16N2O2S, contains a five-membered thiophene ring fused to a benzene ring and a substituted pyrimidinone ring. All three rings in each of the independent molecules of the asymmetric unit lie in approximately the same plane. The crystal structure is stabilized by intermolecular C—H...O hydrogen bonding and π–π stacking interactions.

scholarly journals 2-Chloro-N-(2,4-dichlorophenyl)acetamide

2009 ◽  
Vol 65 (6) ◽  
pp. o1367-o1367
Author(s):  
B. Thimme Gowda ◽  
Sabine Foro ◽  
Hiromitsu Terao ◽  
Hartmut Fuess
Keyword(s):  
Crystal Structure ◽  
Hydrogen Bonding ◽  
Title Compound ◽  
Independent Molecule ◽  
Asymmetric Unit ◽  
Compound C ◽  
Supramolecular Chains

The structure of the title compound, C8H6Cl3NO, contains two molecules in the asymmetric unit. In each independent molecule, the conformation of the N—H bond is almostsynto theortho-chloro substituent and the conformation of the C=O bond isantito the N—H bond. The molecules in the crystal structure are linked into supramolecular chains through N—H...O hydrogen bonding along theaaxis.

scholarly journals Crystal structure of (E)-2-hydroxy-1,2-diphenylethan-1-one oxime

2017 ◽  
Vol 73 (7) ◽  
pp. 1062-1065
Author(s):  
Hans Reuter ◽  
Coco K. Y. A. Okio
Keyword(s):  
Crystal Structure ◽  
Hydrogen Bonding ◽  
Title Compound ◽  
Racemic Mixture ◽  
Oxime Group ◽  
Asymmetric Unit ◽  
Multidentate Ligand ◽  
Compound C ◽  
Hydroxy Groups

The title compound, C14H13NO2, is a commercially available material and can be used as a multidentate ligand. The molecule of the asymmetric unit has anRconfiguration, while the correspondingS-configured molecule of the racemic mixture is generated by a crystallographic centre of symmetry. Both hydroxy groups (the H atom of the oxime group is equally disordered over two positions) are involved in hydrogen bonding, leading to the formation of chains extending parallel to [001].

scholarly journals Crystal structure of the thalidomide analog (3aR*,7aS*)-2-(2,6-dioxopiperidin-3-yl)hexahydro-1H-isoindole-1,3(2H)-dione

2018 ◽  
Vol 74 (11) ◽  
pp. 1595-1598 ◽  
Author(s):  
Yousef Hijji ◽  
Ellis Benjamin ◽  
Jerry P. Jasinski ◽  
Ray J. Butcher
Keyword(s):  
Crystal Structure ◽  
Hydrogen Bonding ◽  
Aromatic Ring ◽  
Title Compound ◽  
Reciprocal Lattice ◽  
Three Dimensional ◽  
Racemic Mixture ◽  
Asymmetric Unit ◽  
Compound C ◽  
Graph Set

The title compound, C13H16N2O4, crystallizes in the monoclinic centrosymmetric space group, P21/c, with four molecules in the asymmetric unit, thus there is no crystallographically imposed symmetry and it is a racemic mixture. The structure consists of a six-membered unsaturated ring bound to a five-membered pyrrolidine-2,5-dione ring N-bound to a six-membered piperidine-2,6-dione ring and thus has the same basic skeleton as thalidomide, except for the six-membered unsaturated ring substituted for the aromatic ring. In the crystal, the molecules are linked into inversion dimers by R 2 2(8) hydrogen bonding involving the N—H group. In addition, there are bifurcated C—H...O interactions involving one of the O atoms on the pyrrolidine-2,5-dione with graph-set notation R 1 2(5). These interactions along with C—H...O interactions involving one of the O atoms on the piperidine-2,6-dione ring link the molecules into a complex three-dimensional array. There is pseudomerohedral twinning present which results from a 180° rotation about the [100] reciprocal lattice direction and with a twin law of 1 0 0 0 \overline{1} 0 0 0 \overline{1} [BASF 0.044 (1)].

scholarly journals Crystal structure of (E)-1-methyl-2-[2-(2-methoxphenyl)ethenyl]-4-nitro-1H-imidazole

2014 ◽  
Vol 70 (9) ◽  
pp. o966-o967
Author(s):  
Hayette Alliouche ◽  
Abdelmalek Bouraiou ◽  
Sofiane Bouacida ◽  
Hocine Merazig ◽  
Ali Belfaitah
Keyword(s):  
Crystal Structure ◽  
Hydrogen Bonding ◽  
Dihedral Angle ◽  
Title Compound ◽  
Crystal Packing ◽  
Three Dimensional ◽  
Stacking Interactions ◽  
Asymmetric Unit ◽  
Compound C ◽  
Dimensional Network

In the asymmetric unit of the title compound, C13H13N3O3, the 2-(2-methoxphenyl)ethenyl unit is connected to the methyl-nitroimidazole 1-methyl-4-nitro-1H-imidazole moiety. The molecule is quasi-planar and the planes of the two rings form a dihedral angle of 0.92 (11)°. The crystal packing can be described as layers parallel to the (011) plane, stabilized by intermolecular C—H...O hydrogen bonding, resulting in the formation of an infinite three-dimensional network linking these layers. Strong π–π stacking interactions are observed,viz.benzene–benzene, imidazole–imidazole and benzene–imidazole rings, with centroid–centroid distances of 3.528 (2), 3.457 (2) and 3.544 (2) Å, respectively. Intensity statistics indicated twinning by non-merohedry, with refined weighs of the twin components of 0.3687:0.6313.

2′,7′-Di-4-pyridylspiro[cyclopropane-1,9′-fluorene] hemihydrate

2006 ◽  
Vol 62 (7) ◽  
pp. o3013-o3014 ◽  
Author(s):  
Zi-Xing Wang ◽  
Hai-Yao Lin ◽  
Ping Lu
Keyword(s):  
Crystal Structure ◽  
Hydrogen Bonding ◽  
Water Molecule ◽  
Title Compound ◽  
Dihedral Angles ◽  
Asymmetric Unit ◽  
Solvent Water Molecule ◽  
One Dimensional ◽  
Solvent Water ◽  
Compound C

The asymmetric unit of the crystal structure of the title compound, C25H18N2·0.5H2O, contains two independent dipyridylspiro(cyclopropanefluorene) (CPF) molecules and one solvent water molecule. The two CPF molecules show significantly different dihedral angles between the pyridine rings and fluorene plane. The water molecule links with the CPF molecules via O—H...N hydrogen bonding to form a one-dimensional supramolecular chain.

scholarly journals Crystal structure of N,N-diisopropyl-4-methylbenzenesulfonamide

2020 ◽  
Vol 76 (7) ◽  
pp. 1018-1021
Author(s):  
Brock A. Stenfors ◽  
Richard J. Staples ◽  
Shannon M. Biros ◽  
Felix N. Ngassa
Keyword(s):  
Crystal Structure ◽  
Solid State ◽  
Hydrogen Bonds ◽  
Title Compound ◽  
Functional Group ◽  
Asymmetric Unit ◽  
Isopropyl Group ◽  
Hydrogen Atoms ◽  
Bond Lengths ◽  
Compound C

The synthesis of the title compound, C13H21NO2S, is reported here along with its crystal structure. This compound crystallizes with two molecules in the asymmetric unit. The sulfonamide functional group of this structure features S=O bond lengths ranging from 1.433 (3) to 1.439 (3) Å, S—C bond lengths of 1.777 (3) and 1.773 (4) Å, and S—N bond lengths of 1.622 (3) and 1.624 (3) Å. When viewing the molecules down the S—N bond, the isopropyl groups are gauche to the aromatic ring. On each molecule, two methyl hydrogen atoms of one isopropyl group are engaged in intramolecular C—H...O hydrogen bonds with a nearby sulfonamide oxygen atom. Intermolecular C—H...O hydrogen bonds and C—H...π interactions link molecules of the title compound in the solid state.

scholarly journals 5-Amino-1-(2′,3′-O-isopropylidene-D-ribityl)-1H-imidazole-4-carboxamide: a crystal structure withZ′ = 4

2017 ◽  
Vol 73 (2) ◽  
pp. 183-187 ◽  
Author(s):  
Vincenzo Piccialli ◽  
Nicola Borbone ◽  
Giorgia Oliviero ◽  
Gennaro Piccialli ◽  
Stefano D'Errico ◽  
...  
Keyword(s):  
Crystal Structure ◽  
Hydrogen Bonding ◽  
Title Compound ◽  
Monoclinic Space Group ◽  
Intermolecular Hydrogen Bonding ◽  
Asymmetric Unit ◽  
Compound C ◽  
Independent Molecules ◽  
Intramolecular Hydrogen ◽  
Similar Conformation

The title compound, C12H20N4O5, crystallizes in the monoclinic space groupP21, with four crystallographically independent molecules in the asymmetric unit. The four molecules have a very similar conformation that is basically determined by the formation of two intramolecular hydrogen bonds between the amino NH2donors and the carbonyl and ring O-atom acceptors, forming, respectively,R(6) andR(7) ring motifs.. In the crystal, intermolecular hydrogen bonding leads to the formation ofR22(10) ring patterns, involving one amide CONH2donor and an imidazole N-atom acceptor. The cluster of the four independent molecules has approximate non-crystallographicC2point symmetry. The structural analysis also shows that during the synthesis of the title compound, the reductive cleavage of the D-ribose ring of the inosine precursor proceeds stereoselectively, with retention of configuration.

scholarly journals Crystal structure of 1-{1-[2-(phenylselanyl)phenyl]-1H-1,2,3-triazol-4-yl}cyclohexan-1-ol

2015 ◽  
Vol 71 (3) ◽  
pp. o200-o201 ◽  
Author(s):  
Leandro R. S. Camargo ◽  
Julio Zukerman-Schpector ◽  
Anna M. Deobald ◽  
Antonio L. Braga ◽  
Edward R. T. Tiekink
Keyword(s):  
Crystal Structure ◽  
Hydrogen Bonding ◽  
Benzene Ring ◽  
Title Compound ◽  
Triazole Ring ◽  
Dihedral Angles ◽  
Asymmetric Unit ◽  
Compound C ◽  
Independent Molecules ◽  
Supramolecular Chains

Two independent molecules,AandB, comprise the asymmetric unit of the title compound, C20H21N3OSe. While the benzene ring directly bound to the central triazole ring is inclined to the same extent in both molecules [dihedral angles = 40.41 (12) (moleculeA) and 44.14 (12)° (B)], greater differences are apparent in the dihedral angles between the Se-bound rings,i.e.74.28 (12) (moleculeA) and 89.91 (11)° (B). Close intramolecular Se...N interactions of 2.9311 (18) (moleculeA) and 2.9482 (18) Å (B) are noted. In the crystal, supramolecular chains along theaaxis are formedviaO—H...N hydrogen bonding. These are connected into layersviaC—H...O and C—H...N interactions; these stack along (01-1) without directional intermolecular interactions between them.

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