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 Crystal structure of 5-[bis(4-ethoxyphenyl)amino]thiophene-2-carbaldehyde

2014 ◽  
Vol 70 (9) ◽  
pp. o1075-o1076 ◽  
Author(s):  
Jing-Yun Tan ◽  
Ming Kong ◽  
Jie-Ying Wu
Keyword(s):  
Crystal Structure ◽  
Hydrogen Bonds ◽  
Dihedral Angle ◽  
Title Compound ◽  
Thiophene Ring ◽  
Dihedral Angles ◽  
Axis Direction ◽  
Compound C ◽  
Benzene Rings ◽  
Supramolecular Chains

In the title compound, C21H21NO3S, the planes of the two benzene rings are nearly perpendicular to one another [dihedral angle = 84.50 (10)°] and they are oriented with respect to the plane of the thiophene ring at dihedral angles of 59.15 (9) and 66.61 (9)°. In the crystal, molecules are linked by weak C—H...O hydrogen bonds, forming supramolecular chains propagating along theb-axis direction.

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 2-nitro-N-(5-nitro-1,3-thiazol-2-yl)benzamide

2014 ◽  
Vol 70 (12) ◽  
pp. o1252-o1252 ◽  
Author(s):  
Rodolfo Moreno-Fuquen ◽  
Diego F. Sánchez ◽  
Javier Ellena
Keyword(s):  
Crystal Structure ◽  
Hydrogen Bonds ◽  
Title Compound ◽  
Dihedral Angles ◽  
Two Dimensional ◽  
Compound C ◽  
Dimensional Network ◽  
Benzene Rings ◽  
The Mean ◽  
Amide Fragment

In the title compound, C10H6N4O5S, the mean plane of the non-H atoms of the central amide fragment C—N—C(=O)—C [r.m.s. deviation = 0.0294 Å] forms dihedral angles of 12.48 (7) and 46.66 (9)° with the planes of the thiazole and benzene rings, respectively. In the crystal, molecules are linked by N—H...O hydrogen bonds, forming chains along [001]. In addition, weak C—H...O hydrogen bonds link these chains, forming a two-dimensional network, containingR44(28) ring motifs parallel to (100).

scholarly journals Crystal structure ofcis-1-(2-methyl-1,2,3,4-tetrahydroquinolin-4-yl)azepan-2-one

2014 ◽  
Vol 70 (9) ◽  
pp. o981-o982 ◽  
Author(s):  
P. S. Pradeep ◽  
S. Naveen ◽  
M. N. Kumara ◽  
K. M. Mahadevan ◽  
N. K. Lokanath
Keyword(s):  
Crystal Structure ◽  
Hydrogen Bonds ◽  
Title Compound ◽  
Chair Conformation ◽  
Compound C ◽  
Supramolecular Chains

In the title compound, C16H22N2O, the azepan-2-one ring adopts a chair conformation, while the 1,2,3,4-tetrahydropyridine ring adopts a half-chair conformation. In the crystal, molecules are linked by N—H...O hydrogen bonds, forming supramolecular chains propagated along [10-1], with weak C—H...O interactions occurring between the chains.

scholarly journals Crystal structure of (E)-4-{[2-(2,4-dinitrophenyl)hydrazin-1-ylidene]methyl}-3-methyl-1-phenyl-5-(1H-pyrrol-1-yl)-1H-pyrazole

2014 ◽  
Vol 70 (12) ◽  
pp. o1246-o1247 ◽  
Author(s):  
Joel T. Mague ◽  
Shaaban K. Mohamed ◽  
Mehmet Akkurt ◽  
Hussein M. S. El-Kashef ◽  
Mustafa R. Albayati
Keyword(s):  
Crystal Structure ◽  
Hydrogen Bond ◽  
Hydrogen Bonds ◽  
Title Compound ◽  
Pyrazole Ring ◽  
Dihedral Angles ◽  
Extended Conformation ◽  
Compound C ◽  
Benzene Rings

The title compound, C21H17N7O4, is in an `extended' conformation aided by an intramolecular N—H...O hydrogen bond. The pyrazole ring makes dihedral angles of 29.17 (6), 65.47 (4) and 9.91 (7)°, respectively, with the phenyl, pyrrole and benzene rings. In the crystal, molecules are connected by pairs of N—H...O and C—H...O hydrogen bonds, forming inversion dimers which associate into ribbons running along thebaxis through complementary C—H...O interactions.

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 Crystal structure of (E)-2-[(4-chloro-2H-chromen-3-yl)methylidene]-N-cyclohexylhydrazinecarbothioamide

2014 ◽  
Vol 70 (9) ◽  
pp. o1039-o1040 ◽  
Author(s):  
Rajeswari Gangadharan ◽  
Jebiti Haribabu ◽  
Ramasamy Karvembu ◽  
K. Sethusankar
Keyword(s):  
Crystal Structure ◽  
Hydrogen Bonds ◽  
Title Compound ◽  
Chair Conformation ◽  
Dihedral Angles ◽  
Compound C ◽  
The Mean

In the title compound, C17H20ClN3OS, the mean plane of the central thiourea core makes dihedral angles of 26.56 (9) and 47.62 (12)° with the mean planes of the chromene moiety and the cyclohexyl ring, respectively. The cyclohexyl ring adopts a chair conformation. The N–H atoms of the thiourea unit adopt ananticonformation. The chromene group is positionedtrans, whereas the cyclohexyl ring lies in thecisposition to the thione S atom, with respect to the thiourea C—N bond. In the crystal, molecules are linked by N—H...S hydrogen bonds, forming inversion dimers enclosingR22(8) ring motifs. The dimers are linked by C—H...Cl hydrogen bonds, enclosingR66(44) ring motifs, forming sheets lying parallel to (010).

(1R,4S,8R,12S,13S,14R,16S,19R)-14-Hydroxy-7,7-dimethyl-17-methylene-2,9,18-trioxo-3,10-dioxapentacyclo[14.2.1.01,13.04,12.08,12]nonadec-19-yl acetate

2007 ◽  
Vol 63 (11) ◽  
pp. o4439-o4439
Author(s):  
Hao Shi
Keyword(s):  
Crystal Structure ◽  
Hydrogen Bonds ◽  
Absolute Configuration ◽  
Title Compound ◽  
Chair Conformation ◽  
Boat Conformation ◽  
Asymmetric Unit ◽  
Compound C ◽  
Independent Molecules ◽  
The Absolute

The title compound, C22H26O8, prepared from the natural diterpenoid Macrocalyxin J, is built up from five fused rings. Cyclohenane ring A adopts a chair conformation, ring B exists in a screw-boat conformation and ring C adopts a boat conformation; the two five membered rings adopt envelope conformations. Two unique molecules are present in the asymmetric unit; both independent molecules have the same absolute configuration, the absolute configuration being deduced from the chirality of Macrocalyxin A, which was isolated from the same plant (i.e. Rabdosia macrocalyx) as Macrocalyxin J. The crystal structure displays intermolecular O—H...O hydrogen bonds.

4-(4-Chlorophenyl)-5-(4-methylphenyl)-3-(2-pyridyl)-4H-1,2,4-triazole

2006 ◽  
Vol 62 (4) ◽  
pp. o1279-o1280
Author(s):  
Shu-Ping Zhang ◽  
Zhao-Di Liu ◽  
Si-Chang Shao
Keyword(s):  
Crystal Structure ◽  
Hydrogen Bonds ◽  
Dihedral Angle ◽  
Title Compound ◽  
Triazole Ring ◽  
Dihedral Angles ◽  
Compound C ◽  
Benzene Rings

In the title compound, C20H15ClN4, the two benzene rings form dihedral angles of 30.95 (9) and 70.69 (6)° with the triazole ring, and the dihedral angle between the triazole and the pyridine rings is 43.38 (8)°. Intermolecular C—H...N hydrogen bonds are observed in the crystal structure.

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