scholarly journals Crystal structure of (E)-N′-{[(1R,3R)-3-isopropyl-1-methyl-2-oxocyclopentyl]methylidene}-4-methylbenzenesulfonohydrazide

2015 ◽  
Vol 71 (2) ◽  
pp. o99-o100 ◽  
Author(s):  
David Tymann ◽  
Dina Christina Dragon ◽  
Christopher Golz ◽  
Hans Preut ◽  
Carsten Strohmann ◽  
...  
Keyword(s):  
Crystal Structure ◽  
Hydrogen Bonds ◽  
Aromatic Ring ◽  
Title Compound ◽  
Membered Ring ◽  
Dihedral Angles ◽  
Relative Configuration ◽  
Axis Direction ◽  
Compound C ◽  
A Chain

The title compound, C17H24N2O3S, was synthesized in order to determine the relative configuration of the corresponding β-keto aldehyde. In the U-shaped molecule, the five-membered ring approximates an envelope with the methylene atom adjacent to the quaternary C atom being the flap. The dihedral angles between the four nearly coplanar atoms of the five-membered ring and the flap and the aromatic ring are 38.8 (4) and 22.9 (2)°, respectively. The bond angles around the S atom are in the range 104.11 (16)–119.95 (16)°. In the crystal, molecules are linkedviaN—H...O by hydrogen bonds, forming a chain along thea-axis direction.

scholarly journals Crystal structure ofN′-[(E)-(1S,3R)-(3-isopropyl-1-methyl-2-oxocyclopentyl)methylidene]-4-methylbenzenesulfonohydrazide

2015 ◽  
Vol 71 (12) ◽  
pp. o904-o905 ◽  
Author(s):  
David Tymann ◽  
Dina Christina Dragon ◽  
Christopher Golz ◽  
Hans Preut ◽  
Carsten Strohmann ◽  
...  
Keyword(s):  
Crystal Structure ◽  
Hydrogen Bonds ◽  
Aromatic Ring ◽  
Title Compound ◽  
Membered Ring ◽  
Dihedral Angles ◽  
Relative Configuration ◽  
Bond Angles ◽  
Compound C ◽  
A Chain

The title compound, C17H24N2O3S, was synthesized in order to determine the relative configuration of the corresponding β-keto aldehyde. In the U-shaped molecule, the five-membered ring approximates an envelope, with the methylene C atom adjacent to the quaternary C atom being the flap, and the methyl and isopropyl substituents lying to the same side of the ring. The dihedral angles between the four nearly coplanar atoms of the five-membered ring and the flap and the aromatic ring are 35.74 (15) and 55.72 (9)°, respectively. The bond angles around the S atom are in the range from 103.26 (12) to 120.65 (14)°. In the crystal, molecules are linkedviaN—H...O hydrogen bonds, forming a chain along theaaxis.

scholarly journals Crystal structure of tetraethyl 27,30-dioxo-7,12,20,25-tetra-tert-butyl-3,16-dioxa-9,22,28,31-tetrathiaheptacyclo[21.3.1.11,5.14,8.110,14.114,18.117,21]dotriaconta-4,6,8(29),10,12,17,19,21(32),23,25-decaene-2,2,15,15-tetracarboxylate

2015 ◽  
Vol 71 (10) ◽  
pp. o778-o779
Author(s):  
Mehmet Akkurt ◽  
Jerry P. Jasinski ◽  
Shaaban K. Mohamed ◽  
Omran A. Omran ◽  
Mustafa R. Albayati
Keyword(s):  
Crystal Structure ◽  
Hydrogen Bonds ◽  
Title Compound ◽  
Membered Ring ◽  
Asymmetric Unit ◽  
Axis Direction ◽  
Tert Butyl ◽  
Envelope Conformation ◽  
Compound C ◽  
A Chain

The asymmetric unit of the title compound, C54H64O12S4, consists of one half of the molecule, which is located on an inversion centre. The heterocyclic six-membered ring adopts a distorted envelope conformation with the spiro C atom as the flap. In the crystal, molecules are linked by weak C—H...O hydrogen bonds with anR22(14) motif, forming a chain along theb-axis direction.

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 Crystal structure of ethyl 2-(1H-benzimidazol-2-yl)-2-[2-(4-nitrophenyl)hydrazinylidene]acetate

2015 ◽  
Vol 71 (4) ◽  
pp. o236-o237
Author(s):  
Mohamed Loughzail ◽  
Abdesselam Baouid ◽  
Lahcen El Ammari ◽  
Mohamed Saadi ◽  
Moha Berraho
Keyword(s):  
Crystal Structure ◽  
Hydrogen Bonds ◽  
Title Compound ◽  
Acetate Group ◽  
Dihedral Angles ◽  
Axis Direction ◽  
Compound C

The title compound, C17H15N5O4, was obtainedviathe condensation of 3-ethoxy-2-[2-(4-nitrophenyl)hydrazono]-3-oxopropanoic acid with 1,2-diaminobenzene. In the molecule, the dihedral angles between the acetate group and the two aromatic subunits (benzimidazole and nitrophenylhydrazone) are 7.35 (9) and 18.23 (9)°, respectively. Intramolecular N—H...O and N—H...N contacts occur. In the crystal, C—H...O and N—H...O hydrogen bonds link the molecules into chains along theb-axis direction.

scholarly journals Crystal structure of 2-{[(naphthalen-1-yl)oxy]methyl}-5-(2,4,5-trifluorophenyl)-1,3,4-oxadiazole

2015 ◽  
Vol 71 (3) ◽  
pp. o190-o191
Author(s):  
Muniyappan Govindhan ◽  
Kathavarayan Subramanian ◽  
Vijayan Viswanathan ◽  
Devadasan Velmurugan
Keyword(s):  
Crystal Structure ◽  
Hydrogen Bonds ◽  
Title Compound ◽  
Ring System ◽  
Dihedral Angles ◽  
Naphthalene Ring ◽  
Axis Direction ◽  
Compound C

In the title compound C19H11F3N2O2, the oxadiazole ring and the naphthalene ring system are approximately planar (r.m.s. deviations of 0.001 and 0.020 Å, respectively) and the oxadiazole ring makes dihedral angles of 13.11 (1) and 7.59 (1)° with the naphthalene ring system and the trifluorophenyl ring, respectively. In the crystal, C—H...N hydrogen bonds link molecules into chains along thea-axis direction, while C—H...F contacts form additional chains along theacdiagonal. These contacts generate sheets of molecules approximately parallel to the (011) plane.

scholarly journals Crystal structure of 3-(4-bromophenylsulfonyl)-2,5,6-trimethyl-1-benzofuran

2014 ◽  
Vol 70 (11) ◽  
pp. 325-327
Author(s):  
Hong Dae Choi ◽  
Uk Lee
Keyword(s):  
Crystal Structure ◽  
Hydrogen Bonds ◽  
Dihedral Angle ◽  
Title Compound ◽  
Ring System ◽  
Axis Direction ◽  
Compound C ◽  
A Chain

In the title compound, C17H15BrO3S, the dihedral angle between the planes of the benzofuran ring system [r.m.s. deviation = 0.015 (2) Å] and the 4-bromophenyl ring is 89.29 (6)°. In the crystal, molecules are linked into a chain along theb-axis direction by C—H...π hydrogen bonds and C—Br...π [3.626 (1) Å] interactions.

scholarly journals Crystal structure of racemic 2-[(β-arabinopyranosyl)sulfanyl]-4,6-diphenylpyridine-3-carbonitrile

2018 ◽  
Vol 74 (6) ◽  
pp. 853-856 ◽  
Author(s):  
Sherif F. Hammad ◽  
Doaa M. Masoud ◽  
Galal H. Elgemeie ◽  
Peter G. Jones
Keyword(s):  
Crystal Structure ◽  
Hydrogen Bonds ◽  
Sulfur Atom ◽  
Title Compound ◽  
Pyridine Ring ◽  
Dihedral Angles ◽  
Axis Direction ◽  
Compound C ◽  
Sugar Ring

In the racemic title compound, C23H20N2O4S, the sulfur atom is attached equatorially to the sugar ring with unequal S—C bonds,viz.: S—Cs= 1.808 (2) and S—Cp= 1.770 (2) Å (s = sugar, p = pyridyl). The dihedral angles between the pyridine ring and its attached phenyl groups are 42.24 (8) and 6.37 (14)°. In the crystal, a system of classical O—H...O and O—H...(O,O) hydrogen bonds links the molecules to form tube-like assemblies propagating parallel to thec-axis direction. Weak C—H...N interactions are also observed.

scholarly journals Crystal structure of 2-amino-4-(4-methoxyphenyl)-4H-benzo[g]chromene-3-carbonitrile

2015 ◽  
Vol 71 (12) ◽  
pp. o1017-o1018
Author(s):  
Joel T. Mague ◽  
Shaaban K. Mohamed ◽  
Mehmet Akkurt ◽  
Sabry H. H. Younes ◽  
Mustafa R. Albayati
Keyword(s):  
Crystal Structure ◽  
Hydrogen Bonds ◽  
Dihedral Angle ◽  
Title Compound ◽  
Ring System ◽  
Membered Ring ◽  
Axis Direction ◽  
Compound C ◽  
Naphthalene Fragment ◽  
Chromene Ring

In the title compound, C21H16N2O2, the naphthalene fragment is twisted slightly, as indicated by the dihedral angle of 3.2 (2)° between the two six-membered rings. The pendant 4-methoxyphenyl ring makes a dihedral angle of 86.08 (6)° with the central six-membered ring of the 4H-benzo[g]chromene ring system. In the crystal, molecules are linked by pairs of N—H...N hydrogen bonds, forming inversion dimers which are linked into chains propagating in theb-axis direction by N—H...O hydrogen bonds.

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.

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