scholarly journals Methyl 2-{[(3-methyl-5-oxo-1-phenyl-4,5-dihydro-1H-pyrazol-4-ylidene)(4-nitrophenyl)methyl]amino}-3-phenylpropanoate

2012 ◽  
Vol 68 (4) ◽  
pp. o1062-o1062
Author(s):  
Xin Zhang ◽  
Chen Sun ◽  
Fei-ran Li ◽  
Hua Zhang
Keyword(s):  
Hydrogen Bond ◽  
Hydrogen Bonds ◽  
Title Compound ◽  
Tautomeric Form ◽  
Compound C

The molecule of the title compound, C27H24N4O5, exists in the keto–enamine tautomeric form, stabilized by an intramolecular N—H...O hydrogen bond. An intramolecular C—H...·O hydrogen bond also occurs. In the crystal, C—H...O hydrogen bonds link the molecules into chains.

scholarly journals 1-{(Z)-[2-Methoxy-5-(trifluoromethyl)anilino]methylidene}naphthalen-2(1H)-one

2013 ◽  
Vol 69 (2) ◽  
pp. o163-o163
Author(s):  
Hakan Kargılı ◽  
Ayşen Alaman Ağar ◽  
Gökhan Alpaslan ◽  
Orhan Büyükgüngör ◽  
Ahmet Erdönmez
Keyword(s):  
Hydrogen Bond ◽  
Hydrogen Bonds ◽  
Benzene Ring ◽  
Dihedral Angle ◽  
Title Compound ◽  
Tautomeric Form ◽  
Ring System ◽  
Trifluoromethyl Group ◽  
Naphthalene Ring ◽  
Compound C

The title compound, C19H14F3NO2, crystallizes in the keto–amine tautomeric form, with a strong intramolecular N—H...O hydrogen bond. The molecule is almost planar; the dihedral angle between the naphthalene ring system and the benzene ring is 4.60 (7)°. In the crystal, molecules are linked into chains along thecaxis by C—H...O hydrogen bonds. The F atoms of the trifluoromethyl group are disordered over two positions with refined site occupancies of 0.668 (9) and 0.332 (9).

scholarly journals 2-((E)-{[4-(Hydroxymethyl)phenyl]imino}methyl)phenol

2012 ◽  
Vol 68 (6) ◽  
pp. o1618-o1618 ◽  
Author(s):  
Shaaban K. Mohamed ◽  
Antar A. Abdelhamid ◽  
Mehmet Akkurt ◽  
Phillip E. Fanwick ◽  
A. M. Maharramov
Keyword(s):  
Crystal Structure ◽  
Hydrogen Bond ◽  
Hydrogen Bonds ◽  
Title Compound ◽  
Tautomeric Form ◽  
Crystal Packing ◽  
Two Dimensional ◽  
Aromatic Rings ◽  
Compound C ◽  
Ring Motif

The title compound, C14H13NO2, adopts the enol–imine tautomeric form, with an intramolecular O—H...N hydrogen bond which generates an S(6) ring motif. The dihedral angle between the aromatic rings is 7.85 (7)°. The crystal structure is stabilized by O—H...O, O—H...N and C—H...O hydrogen bonds, forming a two-dimensional array that stacks along the a axis. In addition, a C—H...π interaction contributes to the stabilization of the crystal packing.

scholarly journals Crystal structure ofN-hydroxyquinoline-2-carboxamide monohydrate

2017 ◽  
Vol 73 (5) ◽  
pp. 795-797
Author(s):  
Inna S. Safyanova ◽  
Kateryna A. Ohui ◽  
Iryna V. Omelchenko ◽  
Svitlana V. Shyshkina
Keyword(s):  
Crystal Structure ◽  
Hydrogen Bond ◽  
Hydrogen Bonds ◽  
Water Molecule ◽  
Title Compound ◽  
Tautomeric Form ◽  
Maximum Deviation ◽  
Aromatic Rings ◽  
Axis Direction ◽  
Compound C

The title compound, C10H8N2O2·H2O, consists of anN-hydroxyquinoline-2-carboxamide molecule in the keto tautomeric form and a water molecule connected through an O—H...O hydrogen bond. TheN-hydroxyquinoline-2-carboxamide molecule has a nearly planar structure [maximum deviation = 0.062 (1) Å] and only the hydroxy H atom deviates significantly from the molecule plane. In the crystal, π–π stacking between the aromatic rings [intercentroid distance = 3.887 (1) Å] and intermolecular O—H...O hydrogen bonds organize the crystal components into columns extending along theb-axis direction.

scholarly journals Crystal structure ofN′-[(1E)-1-(6-methyl-2,4-dioxo-3,4-dihydro-2H-pyran-3-ylidene)ethyl]benzenesulfonohydrazide

2014 ◽  
Vol 70 (11) ◽  
pp. o1179-o1180
Author(s):  
Jonnie N. Asegbeloyin ◽  
Oguejiofo T. Ujam ◽  
Chizoba M. Ngige ◽  
Valentine I. Onwukeme ◽  
Tania Groutso
Keyword(s):  
Crystal Structure ◽  
Hydrogen Bond ◽  
Hydrogen Bonds ◽  
Title Compound ◽  
Tautomeric Form ◽  
Maximum Deviation ◽  
Compound C ◽  
Hydrazone Fragment

In the title compound, C14H14N2O5S, the molecule exists in the enamine (C=C—NH) tautomeric form. The hydrazone fragment derived from the 3-acetyl-4-hydroxy-6-methyl-2H-pyran-2-one moiety is approximately planar, with a maximum deviation of 0.1291 (11) Å for the N atom bound to the S atom of the benzensulfonohydrazide group. The latter adopts agaucheconformation relative to the hydrazone N—N bond, with an N—N—S angle of 113.54 (10)°. There is an intramolecular N—H...O=C hydrogen bond that stabilizes the tautomeric form. In the crystal, molecules are linked by N—H...O=C hydrogen bonds into chains extending parallel to [100].

scholarly journals N′-[(4Z)-1-(3-Methyl-5-oxo-1-phenyl-4,5-dihydro-1H-pyrazol-4-ylidene)hexyl]benzenesulfonohydrazide

2014 ◽  
Vol 70 (6) ◽  
pp. o730-o731 ◽  
Author(s):  
Nkechinyere N. Ukwueze ◽  
Pius O. Ukoha ◽  
Oguejiofo T. Ujam ◽  
Jonnie N. Asegbeloyin ◽  
Tania Groutso
Keyword(s):  
Hydrogen Bond ◽  
Hydrogen Bonds ◽  
Dihedral Angle ◽  
Torsion Angle ◽  
Title Compound ◽  
Tautomeric Form ◽  
Compound C ◽  
Phenyl Rings ◽  
Centrosymmetric Dimers ◽  
N Vector

In the title compound, C22H26N4O3S, the dihedral angle between the pyrazoloneand phenyl rings is 21.73 (4)°. The benzensulfonohydrazide group adopts agaucheconformation about the N—N vector. The C—N—N—S torsion angle is −109.88 (13)°. The molecule exists as the enamine tautomeric form (C=C—NH). An intramolecular N—H...O=C hydrogen bond occurs. In the crystal, molecules are linked by pairs of N—H...O=C hydrogen bonds, forming centrosymmetric dimers.

6,9-Dibromo-2a,10b-diphenyl-2a,5,10,10b-tetrahydro-2H,3H-2,3,4a,10a-tetraazabenzo[g]cyclopenta[cd]azulene-1,4-dione monohydrate

2006 ◽  
Vol 62 (5) ◽  
pp. o1754-o1755
Author(s):  
Neng-Fang She ◽  
Sheng-Li Hu ◽  
Hui-Zhen Guo ◽  
An-Xin Wu
Keyword(s):  
Crystal Structure ◽  
Hydrogen Bond ◽  
Hydrogen Bonds ◽  
Water Molecule ◽  
Title Compound ◽  
Supramolecular Structure ◽  
Hydrogen Bond Donor ◽  
Hydrogen Bond Acceptor ◽  
Compound C ◽  
Bifurcated Hydrogen Bond

The title compound, C24H18Br2N4O2·H2O, forms a supramolecular structure via N—H...O, O—H...O and C—H...O hydrogen bonds. In the crystal structure, the water molecule serves as a bifurcated hydrogen-bond acceptor and as a hydrogen-bond donor.

scholarly journals 14,15-Didehydrohellebrigenin

2012 ◽  
Vol 68 (6) ◽  
pp. o1614-o1615
Author(s):  
Tong Yu ◽  
Hai-Yan Tian ◽  
Xiao-Feng Yuan ◽  
Shu-Zhi Hu ◽  
Ren-Wang Jiang
Keyword(s):  
Hydrogen Bond ◽  
Hydrogen Bonds ◽  
Title Compound ◽  
Lactone Ring ◽  
Three Dimensional ◽  
Membered Ring ◽  
Envelope Conformation ◽  
Compound C ◽  
Dimensional Network ◽  
Hydroxy Groups

The title compound, C24H30O5, is the didehydro product of the steroid hellebrigenin (systematic name: 3β,5,14-trihydroxy-19-oxo-5β-bufa-20,22-dienolide). It consists of three cyclohexane rings (A, B and C), a five-membered ring (D) and a six-membered lactone ring (E). The stereochemistry of the ring junctions are A/B cis, B/C trans and C/D cis. Cyclohexane rings A, B and C have normal chair conformations. The five-membered ring D with the C=C bond adopts an envelope conformation. Lactone ring E is essentially planar with a mean derivation of 0.006 (4) Å and is β-oriented at the C atom of ring D to which it is attached. There is an O—H...O hydrogen bond in the molecule involving the hydroxy groups. In the crystal, O—H...O hydrogen bonds link the molecules into chains propagating along [010]. The chains are linked by C—H...O contacts into a three-dimensional network.

scholarly journals Crystal structure of 2-methyl-N-{[2-(pyridin-2-yl)ethyl]carbamothioyl}benzamide

2015 ◽  
Vol 71 (9) ◽  
pp. o636-o636
Author(s):  
Nadiah Ameram ◽  
Farook Adam
Keyword(s):  
Crystal Structure ◽  
Hydrogen Bond ◽  
Hydrogen Bonds ◽  
Title Compound ◽  
Thiourea Derivative ◽  
Π Interactions ◽  
Compound C ◽  
Benzene Rings ◽  
Ring Motif

In the title compound, C16H17N3OS, a benzoyl thiourea derivative, the planes of the pyridine and benzene rings are inclined to one another by 66.54 (9)°. There is an intramolecular N—H...O hydrogen bond present forming anS(6) ring motif. In the crystal, molecules are linkedviapairs of N—H...N hydrogen bonds, forming inversion dimers, which are reinforced by pairs of C—H...S hydrogen bonds. The dimers are linkedviaC—H...π interactions, forming ribbons along [010].

4-Bromo-N-(3,4-methylenedioxybenzyl)aniline

2007 ◽  
Vol 63 (11) ◽  
pp. o4404-o4404 ◽  
Author(s):  
Shu-Ping Yang ◽  
Li-Jun Han ◽  
Da-Qi Wang ◽  
Hai-Tao Xia
Keyword(s):  
Hydrogen Bond ◽  
Hydrogen Bonds ◽  
Network Structure ◽  
Title Compound ◽  
Three Dimensional ◽  
Compound C ◽  
Dimensional Network

In the title compound, C14H12BrNO2, the molecules are linked by one C—H...Br hydrogen bond, so forming a C(13) chain running parallel to the [010] direction, and these chains are linked by further C—H...π and C—H...Br hydrogen bonds, resulting in a three-dimensional network structure.

scholarly journals (4Z)-4-(2-Oxopropylidene)-1,3-bis(prop-2-en-1-yl)-2,3,4,5-tetrahydro-1H-1,5-benzodiazepin-2-one

IUCrData ◽  
2017 ◽  
Vol 2 (4) ◽  
Author(s):  
Jihad Sebhaoui ◽  
Youness El Bakri ◽  
Ibtissam Rayni ◽  
Khadija El Bourakadi ◽  
El Mokhtar Essassi ◽  
...  
Keyword(s):  
Hydrogen Bond ◽  
Hydrogen Bonds ◽  
Title Compound ◽  
Compound C ◽  
Acetyl Group

In the title compound, C18H20N2O2, the diazepin-2-one ring adopts a tub conformation. The conformation of the acetyl group is partially determined by an intramolecular N—H...O hydrogen bond. In the crystal, pairwise C—H...O hydrogen bonds form inversion dimers.

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