scholarly journals A new polymorph ofN-(2-{N′-[(1E)-2-hydroxybenzylidene]hydrazinecarbonyl}phenyl)benzamide

2014 ◽  
Vol 70 (6) ◽  
pp. o645-o646
Author(s):  
Shaaban K. Mohamed ◽  
Joel T. Mague ◽  
Mehmet Akkurt ◽  
Herman Potgieter ◽  
Mustafa R. Albayati
Keyword(s):  
Hydrogen Bonds ◽  
Benzene Ring ◽  
Title Compound ◽  
Phenyl Ring ◽  
Three Dimensional ◽  
Supramolecular Network ◽  
Monoclinic Space Group ◽  
Acta Cryst ◽  
Space Group ◽  
Compound C

The title compound, C21H17N3O3, is a new polymorph of an already published structure [Shashidharet al.(2006).Acta Cryst.E62, o4473–o4475]. The previously reported structure crystallizes in the monoclinic space groupC2/c, whereas the structure reported here is in the tetragonal space groupI41/a. The bond lengths and angles are similar in both structures. The molecule adopts an extended conformationviaintramolecular N—H...O and O—H...N hydrogen bonds; the terminal phenyl ring and the hydroxylphenyl ring are twisted with respect to the central benzene ring by 44.43 (7) and 21.99 (8)°, respectively. In the crystal, molecules are linked by N—H...O hydrogen bonds, weak C—H...O hydrogen bonds and weak C—H...π interactions into a three-dimensional supramolecular network.

scholarly journals N′-[(E)-4-Chlorobenzylidene]-2-(2,3-dimethylanilino)benzohydrazide

IUCrData ◽  
2017 ◽  
Vol 2 (9) ◽  
Author(s):  
Jerry P. Jasinski ◽  
Mehmet Akkurt ◽  
Shaaban K. Mohamed ◽  
Evan M. Dunkley ◽  
Mustafa R. Albayati
Keyword(s):  
Hydrogen Bonds ◽  
Benzene Ring ◽  
Dihedral Angle ◽  
Title Compound ◽  
Three Dimensional ◽  
Dihedral Angles ◽  
Supramolecular Network ◽  
Π Interactions ◽  
Compound C

In the title compound, C22H20ClN3O, the dihedral angle between the planes of the chlorophenyl and dimethylphenyl rings is 66.50 (9)°. These rings make dihedral angles 47.79 (8) and 69.24 (9)°, respectively, with the central benzene ring. In the crystal, molecules are linked into a three-dimensional supramolecular network by N—H...O, C—H...O hydrogen bonds and weak C—H...π interactions.

scholarly journals 4-(4-Bromophenyl)-8-methyl-2-oxo-1,2,3,4,4a,5,6,7-octahydroquinoline-3-carbonitrile

2012 ◽  
Vol 68 (8) ◽  
pp. o2376-o2377
Author(s):  
Abdullah M. Asiri ◽  
Hassan M. Faidallah ◽  
Seik Weng Ng ◽  
Edward R. T. Tiekink
Keyword(s):  
Hydrogen Bonds ◽  
Benzene Ring ◽  
Torsion Angle ◽  
Title Compound ◽  
Phenyl Ring ◽  
Three Dimensional ◽  
Π Interactions ◽  
Envelope Conformation ◽  
Compound C ◽  
Cyclohexene Ring

In the title compound, C17H17BrN2O, the N-containing ring adopts an envelope conformation with the C atom carrying the phenyl ring displaced by −0.531 (9) Å from the plane defined by the remaining five atoms (r.m.s. deviation = 0.0099 Å). The benzene ring is almost orthogonal to the ring to which it is attached, the CCN—C—CPh—CPhtorsion angle being −101.3 (7)°. The cyclohexene ring is disordered over two conformations in a statistical ratio. The most prominent interactions in the crystal are pairs of N—H...O hydrogen bonds between inversion-related molecules. The resulting dimers are linked into a three-dimensional architecture by C—H...N, C—H...Br and C—H...π interactions.

scholarly journals 5-Hydroxy-2-phenyl-7-(prop-2-yn-1-yloxy)-4H-chromen-4-one

IUCrData ◽  
2017 ◽  
Vol 2 (4) ◽  
Author(s):  
Fan Yang ◽  
Yang Li ◽  
Shu-Jing Zhou
Keyword(s):  
Hydrogen Bond ◽  
Hydrogen Bonds ◽  
Title Compound ◽  
Phenyl Ring ◽  
Three Dimensional ◽  
Ring System ◽  
Maximum Deviation ◽  
Supramolecular Network ◽  
Stacking Interactions ◽  
Compound C

In the title compound, C18H12O4, the essentially planar chromenone ring system [the maximum deviation = 0.016 (2) Å] is nearly co-planar with the phenyl ring [dihedral angle = 3.85 (8)°]. An intramolecular O—H...O hydrogen bond occurs. In the crystal, weak C—H...O hydrogen bonds and π–π stacking interactions link the molecules into a three-dimensional supramolecular network.

scholarly journals A second polymorph of (Z)-3-amino-4-(2-phenylhydrazinylidene)-1H-pyrazol-5(4H)-one

2014 ◽  
Vol 70 (2) ◽  
pp. o141-o142
Author(s):  
Abdel-Sattar S. Hamad Elgazwy ◽  
Peter G. Jones
Keyword(s):  
Hydrogen Bond ◽  
Hydrogen Bonds ◽  
Title Compound ◽  
Monoclinic Space Group ◽  
Acta Cryst ◽  
Triclinic Space Group ◽  
Space Group ◽  
Compound C

The molecule of the title compound, C9H9N5O, is approximately planar (the r.m.s. deviation of all non-H atoms is 0.08 Å). The amine substituent is pyramidal at the N atom. An intramolecular N—Hhydrazine...O=C hydrogen bond is present. In the crystal, molecules are connectedviaN—H...N and N—H...O hydrogen bonds, forming infinite layers parallel to (010). This polymorph is triclinic, space groupP-1, whereas the previously reported form was monoclinic, space groupP21/c[Elgemeieet al.(2013).Acta Cryst. E69, o187], with stepped layers and a significantly lower density.

scholarly journals N′-[(1E)-1-(4-Chlorophenyl)ethylidene]-2-(2,3-dimethylanilino)benzohydrazide

IUCrData ◽  
2017 ◽  
Vol 2 (8) ◽  
Author(s):  
Shaaban K. Mohamed ◽  
Jerry P. Jasinski ◽  
Mehmet Akkurt ◽  
Elizabeth A. McGurk ◽  
Mustafa R. Albayati ◽  
...  
Keyword(s):  
Hydrogen Bonds ◽  
Benzene Ring ◽  
Dihedral Angle ◽  
Title Compound ◽  
Three Dimensional ◽  
Dihedral Angles ◽  
Supramolecular Network ◽  
Π Interactions ◽  
Compound C

In the title compound, C23H22ClN3O, the dihedral angle between the planes of the chlorophenyl and dimethylphenyl rings is 62.49 (10)°. These rings make dihedral angles of 21.11 (9) and 59.85 (9)°, respectively, with the central benzene ring. In the crystal, molecules are linked into a three-dimensional supramolecular network by N—H...N, N—H...O and C—H...O hydrogen bonds, and weak C—H...π interactions.

scholarly journals (Z)-1-(4-Methylphenyl)-2-(phenylsulfonyl)ethanone oxime

2012 ◽  
Vol 68 (8) ◽  
pp. o2369-o2369
Author(s):  
Hoong-Kun Fun ◽  
Tze Shyang Chia ◽  
Khalid A. Al-Rashood ◽  
Hatem A. Abdel-Aziz
Keyword(s):  
Hydrogen Bonds ◽  
Benzene Ring ◽  
Dihedral Angle ◽  
Torsion Angle ◽  
Title Compound ◽  
Phenyl Ring ◽  
Three Dimensional ◽  
Compound C ◽  
Dimensional Network

The molecule of the title compound, C15H15NO3S, has a twisted U-shaped conformation: the twist occurs at the central C—S(=O)2—C—C—C unit and the benzene ring makes a dihedral angle of 28.74 (7)° with the phenyl ring. The S—C—C=N torsion angle is −88.95 (13)°. In the crystal, inversion dimers linked by pairs of O—H...N hydrogen bonds generateR22(6) loops, and C—H...O hydrogen bonds connect the dimers into a three-dimensional network.

scholarly journals 4-Methyl-N-{2-[(E)-3-oxo-3-phenylprop-1-en-1-yl]phenyl}benzenesulfonamide

2014 ◽  
Vol 70 (8) ◽  
pp. o851-o851
Author(s):  
Sung-Gon Kim
Keyword(s):  
Hydrogen Bonds ◽  
Benzene Ring ◽  
Title Compound ◽  
Three Dimensional ◽  
Supramolecular Network ◽  
Compound C

In the title compound, C22H19NO3S, the terminal phenyl and methylphenyl rings are twisted by 37.35 (12) and 49.08 (13)°, respectively, to the central benzene ring. In the crystal, molecules are linked by classical N—H...O hydrogen bonds and weak C—H...O hydrogen bonds into a three-dimensional supramolecular network.

scholarly journals 1-(4-Methoxyphenylsulfonyl)-5-methyl-5-phenylimidazolidine-2,4-dione

2009 ◽  
Vol 65 (6) ◽  
pp. o1207-o1208 ◽  
Author(s):  
Abid Hussain ◽  
Shahid Hameed ◽  
Helen Stoeckli-Evans
Keyword(s):  
Crystal Structure ◽  
Hydrogen Bonds ◽  
Benzene Ring ◽  
Title Compound ◽  
Phenyl Group ◽  
Monoclinic Space Group ◽  
Asymmetric Unit ◽  
Space Group ◽  
Compound C ◽  
Centrosymmetric Dimers

The title compound, C17H16N2O5S, crystallized in the chiral monoclinic space groupP21, with two enantiomeric molecules (AandB) in the asymmetric unit. It is composed of a methylimidazolidine-2,4-dione unit substituted with a phenyl group and a 4-methoxyphenylsulfonyl group. The benzene ring mean planes are inclined to one another by 22.20 (14)° in moleculeAand by 15.82 (13)° in moleculeB. In the crystal structure, theAandBmolecules are linked by N—H...O hydrogen bonds, forming centrosymmetric dimers. A number of C—H...O interactions are also present in the crystal structure, leading to the formation of a three-dimensinoal network.

scholarly journals 4-Fluoro-N-(4-hydroxybenzylidene)aniline

2014 ◽  
Vol 70 (8) ◽  
pp. o860-o860
Author(s):  
L. Jothi ◽  
G. Anuradha ◽  
G. Vasuki ◽  
R. Ramesh Babu ◽  
K. Ramamurthi
Keyword(s):  
Hydrogen Bonds ◽  
Benzene Ring ◽  
Schiff Bases ◽  
Title Compound ◽  
Three Dimensional ◽  
Dihedral Angles ◽  
Axis Direction ◽  
Compound C ◽  
Dimensional Network ◽  
Phenyl Rings

In the title compound, C13H10FNO, the benzene ring planes are inclined at an angle of 50.52 (8)°. A characteristic of aromatic Schiff bases withN-aryl substituents is that the terminal phenyl rings are twisted relative to the plane of the HC=N link between them. In this case, the HC=N unit makes dihedral angles of 10.6 (2) and 40.5 (2)° with the hydroxybenzene and flurobenzene rings, respectively. In the crystal, O—H...N and C—H...F hydrogen bonds lead to the formation of chains along thec-andb-axis directions, respectively. C—H...π contacts link molecules alongaand these contacts combine to generate a three-dimensional network with molecules stacked along theb-axis direction.

scholarly journals 2-[Hydroxy(2-methoxyphenyl)methyl]acrylonitrile

2012 ◽  
Vol 68 (8) ◽  
pp. o2467-o2467
Author(s):  
M. Bakthadoss ◽  
R. Selvakumar ◽  
R. Madhanraj ◽  
S. Murugavel
Keyword(s):  
Hydrogen Bonds ◽  
Diffraction Pattern ◽  
Benzene Ring ◽  
Dihedral Angle ◽  
Title Compound ◽  
Acta Cryst ◽  
Compound C ◽  
C And N ◽  
The Mean ◽  
Solvent Molecules

In the title compound, C11H11NO2, the mean planes formed by the benzene ring and the C and N atoms of the acryl group are almost orthogonal to each other, with a dihedral angle of 85.7 (1)°. During the structure analysis, it was observed that the unit cell contains large accessible voids, with a volume of 186.9 Å3, which may host disordered solvent molecules. This affects the diffraction pattern, mostly at low scattering angles. Density identified in these solvent-accessible areas was calculated and corrected for using the SQUEEZE routine inPLATON[Spek (2009),Acta Cryst.D65, 148–155]. Despite the presence of the hydroxy group in the molecule, no classical or nonclassical hydrogen bonds are observed in the structure. This may reflect the fact that the O—H group points towards the solvent-accessible void.

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