scholarly journals Crystal structure oftrans-cyclohexane-1,2-diammonium chromate(VI) from synchrotron X-ray diffraction data

2016 ◽  
Vol 72 (12) ◽  
pp. 1872-1874
Author(s):  
Dohyun Moon ◽  
Jong-Ha Choi
Keyword(s):  
Hydrogen Bonds ◽  
Organic Cation ◽  
Chair Conformation ◽  
The Other ◽  
X Ray Diffraction ◽  
Hybrid Compound ◽  
Acceptor Interaction ◽  
X Ray ◽  
Compound C ◽  
Hydrogen Bonding Interactions

The structure of the title hybrid compound, (C6H16N2)[CrO4], has been determined from synchrotron data. The organic cation adopts a chair conformation. The inorganic CrO42−anion is slightly distorted owing to its involvement in N—H...O hydrogen-bonding interactions with neighbouringtrans-cyclohexane-1,2-diammonium cations, whereby the two Cr—O bonds to the O atoms acting as acceptor atoms for two hydrogen bonds are slightly longer than the other two Cr—O bonds for which only one acceptor interaction per O atom is observed. In the crystal, cations and anions are packed into layers parallel to (001), held together through the aforementioned N—H...O hydrogen bonds.

A New POM-Based Supramolecular Compound: Synthesis, Structure and Adsorptive Property of [Cu(phen)2]3[W6O19]

2014 ◽  
Vol 919-921 ◽  
pp. 2013-2016 ◽  
Author(s):  
Ya Bing Liu ◽  
Hong Jie Wang ◽  
Hong Kai Zhao
Keyword(s):  
Three Dimensional ◽  
Building Blocks ◽  
Monoclinic Space Group ◽  
X Ray Diffraction ◽  
Hybrid Compound ◽  
Adsorptive Property ◽  
X Ray ◽  
Hydrogen Bonding Interactions ◽  
Compound Synthesis ◽  
Metal Organic

A POM - based organice - inorganic hybrid compound with the chemical formula of[Cu (phen)2]3[W6O19] (phen = 1,10-phenanthroline) (1) has been hydrothermally synthesized andstructurally characterized by the elemental analysis, and single crystal X-ray diffraction. Compound 1 crystallizes in the monoclinic space groupC2/c witha=18.319(4) Å,b= 17.311(4) Å,c= 22.248(4) Å,β= 112.40(3) o,V= 6523(2) Å3,Z= 4, R1= 0.0448, andwR2=0.1218. Compound 1 consists of the [W6O19]3-building blocks and [Cu (phen)2]+metal organic cationic moieties, which are packed together via the extensive hydrogen-bonding interactions to form a three-dimensional supramolecular framework. The adsorption of methylene blue (MB) under UV irradiation with 1 as the heterogeneous adsorbent has been investigated, showing a good adsorptive property of 1 for MB degradation.

(1R*,5R*,7R*,8S*)-3-(3,4-Dihydroxybenzoyl)-4-hydroxy-8-methyl-1,5,7-tris(3-methyl-2-butenyl)-8-(4-methyl-3-pentenyl)bicyclo[3.3.1]non-3-ene-2,9-dione

2007 ◽  
Vol 63 (3) ◽  
pp. o1282-o1284 ◽  
Author(s):  
Bruno Ndjakou Lenta ◽  
Diderot Tchamo Noungoue ◽  
Krishna Prasad Devkota ◽  
Patrice Aime Fokou ◽  
Silvere Ngouela ◽  
...  
Keyword(s):  
Hydrogen Bond ◽  
Hydrogen Bonds ◽  
Medicinal Plant ◽  
Chair Conformation ◽  
The Other ◽  
Aryl Group ◽  
One Dimensional ◽  
Compound C ◽  
Bicyclic System ◽  
Symphonia Globulifera

The title compound, C38H50O6, also known as guttiferone A, was isolated from the medicinal plant Symphonia globulifera. It is a benzophenone derivative where one aryl group is derivatized to give a bicyclic system which has two prenyl groups attached to the bridgehead. One of the cyclohexane rings in the bicyclic system is in a chair form, while the other has a distorted half-chair conformation. In addition to an intramolecular O—H...O hydrogen bond, intermolecular O—H...O hydrogen bonds link molecules into one-dimensional chains.

1-Hydroxycyclohexanecarboxylic acid

2007 ◽  
Vol 63 (11) ◽  
pp. o4213-o4213
Author(s):  
Liang-zhong Xu ◽  
Guang-Wei An ◽  
Xu-Dong Yang ◽  
Xu Yi
Keyword(s):  
Hydrogen Bonds ◽  
Broad Spectrum ◽  
Title Compound ◽  
Van Der Waals ◽  
Chair Conformation ◽  
The Other ◽  
Van Der Waals Interactions ◽  
Cyclohexane Ring ◽  
Compound C ◽  
Trade Name

The title compound, C7H12O3, was synthesized as an intermediate for the synthesis of the selective broad-spectrum nonsystemic acaricide spirodiclofen (trade name Envidor). The cyclohexane ring adopts a chair conformation. The molecules pack in layers, with O—H...O hydrogen bonds connecting the layers on one side and only van der Waals interactions on the other side.

scholarly journals 1-Methyl-3-(2-methylphenyl)-3a-nitro-1,2,3,3a,4,9b-hexahydrochromeno[4,3-b]pyrrole

2012 ◽  
Vol 68 (6) ◽  
pp. o1735-o1735
Author(s):  
S. Sundaramoorthy ◽  
N. Sivakumar ◽  
M. Bakthadoss ◽  
D. Velmurugan
Keyword(s):  
Hydrogen Bonds ◽  
Title Compound ◽  
Chair Conformation ◽  
The Other ◽  
Asymmetric Unit ◽  
Pyran Ring ◽  
Pyrrolidine Ring ◽  
Π Interactions ◽  
Compound C ◽  
Independent Molecules

The asymmetric unit of the title compound, C19H20N2O3, contains two independent molecules in both of which the pyrrolidine ring adopts an envelope conformation, but with a C atom as the flap in one molecule and the N atom in the other. The pyran ring adopts a half-chair conformation in both molecules. In the crystal, molecules are linked via C—H...O hydrogen bonds and C—H...π interactions.

scholarly journals 9-(2-Chlorophenyl)-4a-hydroxy-3,4,4a,5,6,7,9,9a-octahydro-2H-xanthene-1,8-dione

2014 ◽  
Vol 70 (4) ◽  
pp. o442-o443 ◽  
Author(s):  
Qiu-Ling Liu ◽  
Xin-Yan Wu ◽  
Feng Gao ◽  
Dan Bao ◽  
Fang-Ming Wang
Keyword(s):  
Hydrogen Bonds ◽  
Title Compound ◽  
Site Occupancy ◽  
Chair Conformation ◽  
The Other ◽  
Cyclohexane Ring ◽  
Carbonyl Groups ◽  
Compound C ◽  
Cyclohexene Ring ◽  
The Mean

In the title compound, C19H19ClO4, the dihydropyran ring and the cyclohexane ring adopt a half-chair conformation and a chair conformation, respectively. The cyclohexene ring has an envelope conformation with the central CH2C atom as the flap. This atom is disordered over two positions [site-occupancy ratio = 0.744 (12):0.256 (12)] above and below the mean plane formed by the other five atoms. In the crystal, O—H...O hydrogen bonds between hydroxy and carbonyl groups link molecules into chains propagating along [001].

Structural and spectroscopic studies of dipotassium 3,3,3′,3′-tetramethylcystinate trihydrate, K2[C10H18N2O4S2]3H2O

1984 ◽  
Vol 62 (6) ◽  
pp. 1127-1133 ◽  
Author(s):  
Romolo Faggiani ◽  
Helen Elaine Howard-Lock ◽  
Colin James Lyne Lock ◽  
Maria Lurdes Martins ◽  
Philip Stuart Smalley
Keyword(s):  
Hydrogen Bonds ◽  
Single Crystal ◽  
Spectroscopic Studies ◽  
The Other ◽  
Ionic Interactions ◽  
Water Molecules ◽  
Torsional Angle ◽  
X Ray Diffraction ◽  
Standard Methods ◽  
X Ray

The compound dipotassium 3,3,3′,3′-tetramethylcystinate trihydrate, K2[C10H18O4N2S2]3H2O, has been prepared and characterized by single crystal X-ray diffraction. Crystals were monoclinic, P21a = 6.160(1), b = 26.473(8), c = 6.193(1) Å, β = 113.94(1)°, with two formula units in the unit cell. Intensities were measured on a Syntex P21, diffractometer with use of MoKα radiation. The structure was solved by standard methods and refined to R1 = 0.0469, R2 = 0.0472 based on 2303 independent observed reflections. The C—S bonds (1.877(6), 1.891(6) Å) are longer than in many similar compounds although the S—S bond (2.040(2) Å) is not. The C—S—S—C torsional angle (108.7(3)°) is larger than normal in dithiol compounds. Other distances and angles are normal. Two types of potassium coordination are present, one a distorted octahedron, the other a distorted trigonal prism. In addition to the ionic interactions, hydrogen bonds involving the water molecules are important in stabilizing the structure.

scholarly journals 12α-Hydroxy-3,27-dioxooleanano-28,13-lactone

2012 ◽  
Vol 68 (6) ◽  
pp. o1586-o1586 ◽  
Author(s):  
Jun-yi Hu ◽  
Gang-gang Wu ◽  
Ying-qian Xu ◽  
Guo-yong Xiao ◽  
Peng Lei
Keyword(s):  
Crystal Structure ◽  
Double Bond ◽  
Hydrogen Bonds ◽  
Lactone Ring ◽  
Chair Conformation ◽  
The Other ◽  
Carbonyl Groups ◽  
Asymmetric Unit ◽  
Compound C ◽  
Independent Molecules

There are two independent molecules in the asymmetric unit of the title compound, C30H44O5. They comprise a triterpenoid skeleton of five six-membered rings and a five-membered lactone ring. The five six-membered rings are all trans-fused. In both independent molecules the D rings adopt a slightly distorted half-chair conformation due the presence of the lactone ring while the other four six-membered rings all adopt chair conformations. The characteristic carbon–carbon double bond of the oleanoic skeleton is absent. Intermolecular O—H...O hydrogen bonds between the hydroxy and carbonyl groups occur in the crystal structure.

scholarly journals (E)-3,3,6,6-Tetramethyl-9-(2-nitrostyryl)-3,4,5,6,7,9-hexahydro-1H-xanthene-1,8(2H)-dione

2012 ◽  
Vol 68 (6) ◽  
pp. o1947-o1947 ◽  
Author(s):  
Jae Kyun Lee ◽  
Sun-Joon Min ◽  
Yong Seo Cho ◽  
Ki Soo Lee ◽  
Joo Hwan Cha
Keyword(s):  
Hydrogen Bonds ◽  
Title Compound ◽  
Chair Conformation ◽  
The Other ◽  
Boat Conformation ◽  
Pyran Ring ◽  
Compound C

In the title compound, C25H27NO5, each of the cyclohexenone rings adopts a half-chair conformation, whereas the six-membered pyran ring adopts a flattened boat conformation, with the O and methine C atoms deviating from the plane of the other four atoms. In the crystal, weak C—H...O hydrogen bonds link molecules into chains parallel to the c axis.

A molecular crown analogue templated by Keggin polyanions: synthesis, structure, and electrochemical and luminescent properties

2015 ◽  
Vol 70 (8) ◽  
pp. 547-553 ◽  
Author(s):  
Chunyan Zhao ◽  
Huiyuan Ma ◽  
Haijun Pang ◽  
Yan Yu ◽  
Shaobin Li ◽  
...  
Keyword(s):  
Hydrogen Bonding ◽  
Infrared Spectroscopy ◽  
Luminescent Properties ◽  
Intermolecular Hydrogen Bonding ◽  
X Ray Diffraction ◽  
Hydrothermal Conditions ◽  
Hybrid Compound ◽  
X Ray ◽  
Hydrogen Bonding Interactions ◽  
Elemental Analyses

AbstractA hybrid compound, [CuI4(bpmb)4][PWVI11WVO40] (1) (bpmb = 1,4-bis(pyrazol-1-ylmethyl)benzene), has been synthesized under hydrothermal conditions and characterized by single-crystal X-ray diffraction analysis, infrared spectroscopy, elemental analyses and powder X-ray diffraction. In compound 1 crown-like [Cu4(bpmb)4]4+ macrocycles templated by Keggin-type [PWVI11WVO40]4− polyanions (abbreviated PW12) exist. Supramolecular layers are formed by intermolecular hydrogen bonding interactions of discrete crown-like [Cu4(bpmb)4]4+ macrocycles and [PWVI11WVO40]4− polyanions. The electrochemical and luminescence properties of compound 1 were investigated.

scholarly journals Design of new anti-Alzheimer drugs: ring-expansion synthesis and synchrotron X-ray diffraction study of dimethyl 4-ethyl-11-fluoro-1,4,5,6,7,8-hexahydroazonino[5,6-b]indole-2,3-dicarboxylate

2018 ◽  
Vol 74 (3) ◽  
pp. 298-301
Author(s):  
Flavien A. A. Toze ◽  
Anna V. Listratova ◽  
Leonid G. Voskressensky ◽  
Natalia Yu. Chernikova ◽  
Nikolai N. Lobanov ◽  
...  
Keyword(s):  
Hydrogen Bonding ◽  
Ring Expansion ◽  
Steric Effects ◽  
X Ray Diffraction ◽  
Interplanar Angle ◽  
X Ray ◽  
Compound C ◽  
Hydrogen Bonding Interactions ◽  
Pyramidal Configuration ◽  
Ring Expansion Reaction

The title compound, C20H23FN2O4, is the product of a ring-expansion reaction from a seven-membered fluorinated hexahydroazepine to a nine-membered azonine. The nine-membered azonine ring of the molecule adopts achair–boatconformation. The C=C and C—N bond lengths [1.366 (3) and 1.407 (3) Å, respectively] indicate the presence of conjugation within the enamine CH2—C=C—N—CH2fragment. The substituent planes at the C=C double bond of this fragment are twisted by 16.0 (3)° as a result of steric effects. The amine N(Et) N atom has a trigonal–pyramidal configuration (sum of the bond angles = 346.3°). The interplanar angle between the two carboxylate substituents is 60.39 (8)°. In the crystal, molecules form zigzag chains along [010] by intermolecular N—H...O hydrogen-bonding interactions, which are further packed in stacks toward [100]. The title azoninoindole might be considered as a candidate for the design of new Alzheimer drugs.

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