scholarly journals (1β,2α,3α,7α,11α,13β)-1,3,7,11-Tetraacetoxy-2,13-bis(benzyloxy)-21-methyl-19,21-secohetisan-19-al hemihydrate

2009 ◽  
Vol 65 (6) ◽  
pp. o1432-o1432 ◽  
Author(s):  
Feng-Zheng Chen ◽  
Qing-Xiang Xiang ◽  
Yuan-Qin Zhang ◽  
Jun-Ru Xiong
Keyword(s):  
Crystal Structure ◽  
Organic Molecule ◽  
Chair Conformation ◽  
Heterocyclic Ring ◽  
Membered Ring ◽  
Boat Conformation ◽  
Solvent Water ◽  
Compound C ◽  
Benzene Rings ◽  
Carbocyclic Rings

In the crystal structure of the title compound, C43H46NO13·0.5H2O, the molecule assumes a U-shaped conformation, the terminal benzene rings being approximately parallel and partially overlapped with each other. The molecule contains eight alicyclic and heterocyclic rings. The cyclohexane rings adopt chair conformations, the other three six-membered carbocyclic rings form a bicyclo[2.2.2]octane system with a boat conformation for each six-membered ring, the six-membered heterocyclic ring has a chair conformation and both of the five-membered rings have envelope conformations. The solvent water molecule links with the organic moleculeviaclassic O—H...O and weak C—H...O hydrogen bonding in the crystal structure.

scholarly journals Crystal structure of (1R,3S,8R,11R)-11-acetyl-3,7,7-trimethyl-10-oxatricyclo[6.4.0.01,3]dodecan-9-one

2015 ◽  
Vol 71 (12) ◽  
pp. o1013-o1014
Author(s):  
Abdoullah Bismoussa ◽  
My Youssef Ait Itto ◽  
Jean-Claude Daran ◽  
Abdelwahed Auhmani ◽  
Aziz Auhmani
Keyword(s):  
Crystal Structure ◽  
Hydrogen Bonds ◽  
Title Compound ◽  
Chair Conformation ◽  
Membered Ring ◽  
Boat Conformation ◽  
Two Dimensional ◽  
Compound C ◽  
Dimensional Network ◽  
A Minor

The title compound, C16H24O3, is built up from three fused rings, a six-membered, a seven-membered and a three-membered ring. The absolute configuration of the title compound was determined as (1R,3S,8R,11R) based on the synthetic pathway. The six-membered ring has an half-chair conformation whereas the seven-membered ring displays a boat conformation. In the cyrstal, C—H...O hydrogen bonds build up a two-dimensional network parallel to (0 0 1). The crystal studied was an inversion twin with a minor twin component of 34%.

scholarly journals Crystal structure of 16-hydroxy-4,4,10,13,14-pentamethyl-17-(6-methylhept-5-en-2-yl)-4,5,6,9,10,11,12,13,14,15,16,17-dodecahydro-1H-cyclopenta[a]phenanthren-3(2H)-one

2015 ◽  
Vol 71 (7) ◽  
pp. o464-o465 ◽  
Author(s):  
Jun-Jun Ge ◽  
Pian Chen ◽  
Xiao-Xia Ye
Keyword(s):  
Crystal Structure ◽  
Hydrogen Bonds ◽  
Chair Conformation ◽  
Membered Ring ◽  
Boat Conformation ◽  
Carbonyl Groups ◽  
Compound C ◽  
Cyclohexene Ring ◽  
Supramolecular Chains ◽  
Twist Boat

The title compound, C30H48O2, contains a fused four-ring triterpenoid system. In the molecule, the two cyclohexane rings adopt a chair conformation and a twist boat conformation, respectively, the central cyclohexene ring adopts a half-chair conformation whereas the five membered ring adopts an envelope conformation. In the crystal, O—H...O hydrogen bonds between the hydroxy and carbonyl groups of adjacent molecules link the molecules into supramolecular chains propagating along theb-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 10-[1,1-Dichloro-4-(trimethylsilyl)but-1-en-3-yn-2-yl]-10H-phenothiazine

IUCrData ◽  
2018 ◽  
Vol 3 (2) ◽  
Author(s):  
Satoru Umezono ◽  
Tsunehisa Okuno
Keyword(s):  
Crystal Structure ◽  
Hydrogen Bonds ◽  
Title Compound ◽  
Membered Ring ◽  
Boat Conformation ◽  
Stacking Interactions ◽  
Pyramidal Geometry ◽  
Compound C ◽  
Benzene Rings ◽  
Vinyl Group

The title compound, C19H17Cl2NSSi, is an enamine derivative, in which the N atom adopts a shallow trigonal–pyramidal geometry [displacement from the plane of its attached C atoms = 0.1383 (18) Å]. The dihedral angle between the plane through the three amino carbon atoms and the vinyl group is 89.47 (7)°. The phenothiazine unit has a butterfly structure and the central six-membered ring adopts a boat conformation. The fold angle between the benzene rings is 28.52 (7)°. The crystal structure features weak Csp3—H...Cl hydrogen bonds, H...S contacts and π–π stacking interactions between phenothiazine units.

scholarly journals Crystal structure of (1RS,21SR,22RS,24SR)-28-oxo-24-propyl-8,11,14-trioxa-24,27-diazapentacyclo[19.5.1.122,26.02,7.015,20]octacosa-2,4,6,15(20),16,18-hexaene acetic acid monosolvate

2016 ◽  
Vol 72 (6) ◽  
pp. 829-832 ◽  
Author(s):  
Truong Hong Hieu ◽  
Le Tuan Anh ◽  
Anatoly T. Soldatenkov ◽  
Nguyen Van Tuyen ◽  
Victor N. Khrustalev
Keyword(s):  
Crystal Structure ◽  
Hydrogen Bond ◽  
Hydrogen Bonding ◽  
Acetic Acid ◽  
Ammonium Acetate ◽  
Solvent Molecule ◽  
Chair Conformation ◽  
Boat Conformation ◽  
Compound C ◽  
Benzene Rings

The title compound, C26H32N2O4(M)·C2H4O2, (I), is the product of the Petrenko–Kritchenko condensation ofN-propylpiperidinone with 1,5-bis(2-formylphenoxy)-3-oxapentane and ammonium acetate. InM, the aza-14-crown-3-ether ring adopts a bowl conformation, with the configuration of the C—O—C—C —O—C—C—O—C polyether chain beingt–g(−)–t–t–g(+)–t(t=trans, 180°;g=gauche, ±60°). The dihedral angle between the planes of the benzene rings fused to the aza-14-crown-4-ether moiety is 62.75 (5)°. The central piperidinone ring has a boat conformation, whereas the terminal piperidinone ring adopts a chair conformation. The boat conformation of the central piperidinone ring is supported by the bifurcated intramolecular N—H...O hydrogen bond. In the crystal, each solvent molecule is linked to moleculeM viastrong O—H...N hydrogen bonding, forming hydrogen-bonded pairs of molecules, which further interact through weak C—H...O hydrogen bonds, forming layers parallel to theacplane.

10-(4-Hydroxy-3-methoxy-5-nitrobenzylidene)anthrone

2007 ◽  
Vol 63 (11) ◽  
pp. o4498-o4498
Author(s):  
Wei Zhou ◽  
Zhimin Wu ◽  
Weixiao Hu ◽  
Chunnian Xia
Keyword(s):  
Crystal Structure ◽  
Hydrogen Bond ◽  
Dihedral Angle ◽  
Hydroxy Group ◽  
Title Compound ◽  
Membered Ring ◽  
Boat Conformation ◽  
Compound C ◽  
Benzene Rings ◽  
Intramolecular Hydrogen

In the title compound, C22H15NO5, prepared from anthrone and 4-hydroxy-3-methoxy-5-nitrobenzaldehyde, the anthracene fragment is non-planar. The central six-membered ring assumes an asymmetric boat conformation, while the two outer benzene rings make a dihedral angle of 28.08 (10)°. The hydroxy group is involved in an intramolecular hydrogen bond. In the crystal structure, a weak intermolecular C—H...O hydrogen bond links the molecules into ribbons along the c axis.

1,2,13,14,14a,15,16,17,18,18a-Decahydro-1,14-methano-4H,6H,8H-1,3,5-oxadiazino[3′,4′:3,3a]benzimidazo[1,7a-b][2,4]benzodiazepine-6,19-dione

2007 ◽  
Vol 63 (11) ◽  
pp. o4440-o4440
Author(s):  
Nengfang She ◽  
Hailing Xi
Keyword(s):  
Crystal Structure ◽  
Hydrogen Bonds ◽  
Title Compound ◽  
Chair Conformation ◽  
Membered Ring ◽  
Cyclohexane Ring ◽  
Boat Conformation ◽  
Compound C

In the title compound, C18H20N4O3, a glycoluril derivative, the oxadiazinane six-membered ring displays a chair conformation and the bridgehead cyclohexane ring a boat conformation. In the crystal structure, intermolecular C—H...O hydrogen bonds may help to establish the packing.

scholarly journals Crystal structure of 2-benzylamino-4-(4-methoxyphenyl)-6,7,8,9-tetrahydro-5H-cyclohepta[b]pyridine-3-carbonitrile

2014 ◽  
Vol 70 (12) ◽  
pp. 525-527 ◽  
Author(s):  
R. A. Nagalakshmi ◽  
J. Suresh ◽  
S. Maharani ◽  
R. Ranjith Kumar ◽  
P. L. Nilantha Lakshman
Keyword(s):  
Crystal Structure ◽  
Pyridine Ring ◽  
Three Dimensional ◽  
Chair Conformation ◽  
Dimensional Structure ◽  
Compound C ◽  
Centroid Distance ◽  
Steric Crowding ◽  
Benzene Rings ◽  
Group A

The title compound, C25H25N3O, comprises a 2-aminopyridine ring fused with a cycloheptane ring, which adopts a chair conformation. The central pyridine ring (r.m.s. deviation = 0.013 Å) carries three substituents,viz.a benzylamino group, a methoxyphenyl ring and a carbonitrile group. The N atom of the carbonitrile group is significantly displaced [by 0.2247 (1) Å] from the plane of the pyridine ring, probably due to steric crowding involving the adjacent substituents. The phenyl and benzene rings are inclined to one another by 58.91 (7)° and to the pyridine ring by 76.68 (7) and 49.80 (6)°, respectively. In the crystal, inversion dimers linked by pairs of N—H...Nnitrilehydrogen bonds generateR22(14) loops. The dimers are linked by C—H...π and slipped parallel π–π interactions [centroid–centroid distance = 3.6532 (3) Å] into a three-dimensional structure.

scholarly journals (Z)-3-Benzyl-1,5-benzothiazepin-4(5H)-one

2012 ◽  
Vol 68 (8) ◽  
pp. o2329-o2329
Author(s):  
V. Sabari ◽  
R. Selvakumar ◽  
M. Bakthadoss ◽  
S. Aravindhan
Keyword(s):  
Crystal Structure ◽  
Hydrogen Bonds ◽  
Title Compound ◽  
Membered Ring ◽  
Boat Conformation ◽  
Compound C

In the crystal structure of the title compound, C16H13NOS, molecules are linked into cyclic centrosymmetricR22(8) dimersviapairs of N—H...O hydrogen bonds. The seven-membered ring adopts a boat conformation.

6′′-Methoxy-1′-methyl-4′-phenylacenaphthene-1-spiro-2′-pyrrolidine-3′-spiro-3′′-chroman-2,4′′-dione

2007 ◽  
Vol 63 (11) ◽  
pp. o4412-o4412 ◽  
Author(s):  
T. Augustine ◽  
V. Ramkumar ◽  
S. Arul Antony ◽  
Charles. C. Kanakam
Keyword(s):  
Crystal Structure ◽  
Title Compound ◽  
Chair Conformation ◽  
Heterocyclic Ring ◽  
Envelope Conformation ◽  
Compound C

In the crystal structure of the title compound, C31H25NO4, the five-membered heterocyclic ring is in an envelope conformation and the dihydropyrone ring is in a half-chair conformation.

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