scholarly journals 4-Methyl-1H-1,5-benzodiazepin-2(3H)-one

IUCrData ◽  
2018 ◽  
Vol 3 (12) ◽  
Author(s):  
Khadim Dioukhane ◽  
Younas Aouine ◽  
Hassane Faraj ◽  
Anouar Alami ◽  
El Mokhtar Essassi ◽  
...  
Keyword(s):  
Hydrogen Bonds ◽  
Title Compound ◽  
Chair Conformation ◽  
Axis Direction ◽  
Compound C ◽  
Membered Heterocycle

In the title compound, C10H10N2O, the seven-membered heterocycle displays a half-chair conformation. In the crystal, N—H...O and C—H...O hydrogen bonds link the molecules into chains propagating along the a-axis direction.

scholarly journals Crystal structure of (Z)-7,8-dichloro-4-(2-oxopropylidene)-4,5-dihydro-1H-1,5-benzodiazepin-2(3H)-one

2015 ◽  
Vol 71 (12) ◽  
pp. o1059-o1060
Author(s):  
Sanae Lahmidi ◽  
Abdelhanine Essaghouani ◽  
El Mokhtar Essassi ◽  
Mohamed Saadi ◽  
Lahcen El Ammari
Keyword(s):  
Crystal Structure ◽  
Hydrogen Bond ◽  
Hydrogen Bonds ◽  
Benzene Ring ◽  
Title Compound ◽  
Chair Conformation ◽  
Compound C ◽  
The Mean ◽  
Membered Heterocycle ◽  
Supramolecular Chains

In the title compound, C12H10Cl2N2O2, the seven-membered heterocycle displays a half-chair conformation. The mean plane through the oxopropylidene group makes a dihedral angle of 36.44 (9)° with the fused benzene ring. An intramolecular N—H...O hydrogen bond to close anS(6) loop is noted. An important feature of the molecular packing are N—H...O hydrogen bonds that lead to the formation of helical supramolecular chains along thebaxis.

scholarly journals 1-Cyclohexyl-6,7-dimethoxy-1,4-dihydronaphthalene

2014 ◽  
Vol 70 (6) ◽  
pp. o671-o671 ◽  
Author(s):  
Shao-Yuan Chen ◽  
Ya-Ping Zhang ◽  
Bing Huang ◽  
Jia-Jun Yu ◽  
Wei-Yong Shi
Keyword(s):  
Hydrogen Bonds ◽  
Title Compound ◽  
Chair Conformation ◽  
Ficus Carica ◽  
Cyclohexane Ring ◽  
Boat Conformation ◽  
Axis Direction ◽  
Compound C ◽  
Supramolecular Chains

The title compound, C18H24O2, was isolated from the leaves extract ofFicus caricaL. The cyclohexane ring displays a chair conformation whereas the cyclohexa-1,4-diene ring adopts a flattened boat conformation with methyl C atoms at the prow and stern. In the crystal, molecules are linked by weak C—H...O hydrogen bonds into supramolecular chains propagated along theb-axis direction.

scholarly journals 2,4-Dichloro-N-{[1-(2,4-dichlorobenzoyl)piperidin-4-yl]methyl}benzamide

IUCrData ◽  
2016 ◽  
Vol 1 (6) ◽  
Author(s):  
S. Gomathi ◽  
D. Reuben Jonathan ◽  
E. R. A. Dravida Thendral ◽  
B. K. Revathi ◽  
G. Usha
Keyword(s):  
Hydrogen Bonds ◽  
Title Compound ◽  
Chair Conformation ◽  
Dihedral Angles ◽  
Axis Direction ◽  
Π Interactions ◽  
Compound C ◽  
Benzene Rings

In the title compound, C20H18Cl4N2O2, the piperdine ring adopts a chair conformation. The dihedral angles between its mean plane and the two benzene rings are 45.5 (3) and 28.0 (3)°, while the benzene rings are inclined to one another by 54.5 (3)°. In the crystal, molecules are linked by N—H...O hydrogen bonds, forming chains along thea-axis direction. Neighbouring chains are linked by C—H...π interactions, forming double-stranded chains along [100].

scholarly journals Crystal structure of a photobiologically active brominated angular pyranocoumarin: bromo-hydroxy-seselin

2017 ◽  
Vol 73 (3) ◽  
pp. 453-455 ◽  
Author(s):  
A. K. Bauri ◽  
Sabine Foro ◽  
A. F. M. Mustafizur Rahman
Keyword(s):  
Crystal Structure ◽  
Hydrogen Bonds ◽  
Title Compound ◽  
Chair Conformation ◽  
Axis Direction ◽  
Π Interactions ◽  
Compound C ◽  
Ring Motif

The title compound, C14H13BrO3[systematic name:rac-(9S,10R)-9-bromo-10-hydroxy-8,8-dimethyl-9,10-dihydro-2H,8H-pyrano[2,3-f]chromen-2-one], is a substituted pyranocoumarin, obtained by bromination of seselin [8,8-dimethyl-2H,8H-pyrano[2,3-f]chromen-2-one], which was isolated from the Indian herbTrachyspermum stictocarpum(Aajmod). The pyrano ring has a distorted half-chair conformation and its mean plane is inclined to the coumarin mean plane by 1.6 (2)°. In the crystal, molecules are linked by pairs of O—H...O hydrogen bonds, forming inversion dimers with anR22(16) ring motif. The dimers stack along thea-axis direction and are linked by offset π–π interactions, forming columns [intercentroid distance = 3.514 (4) Å].

scholarly journals 1-Deacetoxy-1-oxocaesalmin

2014 ◽  
Vol 70 (6) ◽  
pp. o662-o662
Author(s):  
Juan Feng ◽  
Jian-Long Zhang ◽  
Rong-Rong Zhang ◽  
Li-Jun Ruan ◽  
Ren-Wang Jiang
Keyword(s):  
Hydrogen Bonds ◽  
Title Compound ◽  
Furan Ring ◽  
Chair Conformation ◽  
Chain Structure ◽  
Membered Ring ◽  
Axis Direction ◽  
Compound C ◽  
A Chain

The title compound, C24H30O7, is a diterpenoid isolated from the seeds ofCaesalpinia minax. It consists of two cyclohexane rings (AandB), one unsaturated six-membered ring (C) and one furan ring (D). The stereochemistry of the ring junctures isA/B transandB/C trans. RingsAandBhave normal chair conformations whileCadopts a twisted half-chair conformation due to fusion to the furan ring which is planar [r.m.s. deviation = 0.0009 (2) Å]. In the crystal, hydroxyl O—H...Ocarbonylhydrogen bonds link the molecules into a chain structure extending along thea-axis direction.

scholarly journals (−)-Benzyl 2,3-dideoxy-β-D-erythro-hex-2-enopyranoside

2013 ◽  
Vol 69 (12) ◽  
pp. o1811-o1811 ◽  
Author(s):  
Shigeru Ohba ◽  
Hayato Okazaki ◽  
Yuji Ueda ◽  
Kengo Hanaya ◽  
Mitsuru Shoji ◽  
...  
Keyword(s):  
Hydrogen Bonds ◽  
Title Compound ◽  
Site Occupancy ◽  
Phenyl Group ◽  
Chair Conformation ◽  
Membered Ring ◽  
Axis Direction ◽  
Sugar Moiety ◽  
Compound C ◽  
Common Plane

In the title compound, C13H16O4, the six-membered ring of the sugar moiety shows a half-chair conformation. In the crystal, molecules are connectedviaO—H...O hydrogen bonds, forming columns around twofold screw axes along theb-axis direction. There is a disorder of the benzyloxy group, which has two possible orientations with the phenyl group lying on a common plane [site-occupancy factors = 0.589 (9) and 0.411 (9)].

scholarly journals tert-Butyl 4-(3,4-dichloroanilino)piperidine-1-carboxylate

2013 ◽  
Vol 69 (2) ◽  
pp. o205-o205
Author(s):  
Mehr-un-Nisa ◽  
Munawar Ali Munawar ◽  
Gabriel B. Hall ◽  
Sue A. Roberts ◽  
Victor J. Hruby
Keyword(s):  
Hydrogen Bonds ◽  
Title Compound ◽  
Chair Conformation ◽  
Piperidine Ring ◽  
Axis Direction ◽  
Tert Butyl ◽  
Compound C

In the title compound, C16H22Cl2N2O2, the substituted piperidine ring adopts a chair conformation with both substituents in equatorial positions. In the crystal, N—H...O and C—H...O hydrogen bonds connect molecules into ribbons along thea-axis direction.

scholarly journals 1-Cyclohexyl-5-(2-hydroxybenzoyl)-3-nitropyridin-2(1H)-one

IUCrData ◽  
2017 ◽  
Vol 2 (1) ◽  
Author(s):  
T. Siva Ranjani ◽  
N. Poomathi ◽  
G. Vimala ◽  
Paramasivam T. Perumal ◽  
K. Sakthi Murugesan
Keyword(s):  
Hydrogen Bond ◽  
Hydrogen Bonds ◽  
Dihedral Angle ◽  
Title Compound ◽  
Chair Conformation ◽  
Cyclohexane Ring ◽  
Axis Direction ◽  
Π Interactions ◽  
Compound C ◽  
Ring Motif

In the title compound, C18H18N2O5, the cyclohexane ring adopts a chair conformation, and its mean plane is almost normal to the central pyridin-2-one ring with a dihedral angle of 87.94 (8)°. The latter ring is inclined to the 2-hydroxybenzoyl ring by 50.92 (8)°. There is an intramolecular O—H...O hydrogen bond in this unit forming anS(6) ring motif. The NO2group is disordered over two orientations of equal occupancy. In the crystal, molecules are linkedviaC—H...O hydrogen bonds, forming chains propagating along [001]. Inversion-related chains are linked by C—H...π interactions, forming columns along thec-axis direction.

scholarly journals Crystal structure of 10a-hydroxy-9-(3-nitrophenyl)-3,6-diphenyl-3,4,5,6,7,8a,9,10a-octahydro-1H-xanthene-1,8(2H)-dione

2015 ◽  
Vol 71 (12) ◽  
pp. 1510-1512
Author(s):  
Xin-Yuan Zhang ◽  
Bing-Xiang Hu ◽  
Ze-Yu Zhou ◽  
Lei Zhou ◽  
Fang-Ming Wang
Keyword(s):  
Crystal Structure ◽  
Hydrogen Bonds ◽  
Title Compound ◽  
Chair Conformation ◽  
Dihedral Angles ◽  
Boat Conformation ◽  
Axis Direction ◽  
Compound C ◽  
Benzene Rings ◽  
Supramolecular Chains

In the octahydroxanthenedione unit of the title compound, C31H27NO6, the central dihydropyran ring shows an envelope conformation, while the bilateral cyclohexene and cyclohexane rings adopt a half-boat conformation and a chair conformation, respectively. The nitrobenzene ring is twisted with respect to the two benzene rings, making dihedral angles of 63.1 (1) and 63.0 (1)°. In the crystal, O—H...O hydrogen bonds link the molecules into supramolecular chains propagating along thea-axis direction.

scholarly journals 4-Dichloromethyl-4-methyl-5-(nitromethyl)cyclohex-2-enone

2013 ◽  
Vol 69 (11) ◽  
pp. o1638-o1638 ◽  
Author(s):  
Sladjana B. Novaković ◽  
Marko V. Rodić ◽  
Željko K. Jaćimović ◽  
Zoran Ratković ◽  
Slobodan Sukdolak
Keyword(s):  
Hydrogen Bonds ◽  
Title Compound ◽  
Chair Conformation ◽  
Membered Ring ◽  
Axis Direction ◽  
Compound C ◽  
Acceptor Atom ◽  
A Chain

In the title compound, C9H11Cl2NO3, the six-membered ring adopts a screw-chair conformation. In the crystal, two different C—H...O hydrogen bonds involving the same acceptor atom connect the molecules into a chain extending along thec-axis direction.

Sign in / Sign up

Export Citation Format

Share Document