Constituents of Endiandra species. II. (E)-4-(6'-Phenyltetracyclo[5,4,2,03,13,010,12]-trideca-4',8'-dien-11'-yl)but-2-enoic acid from Endiandra introrsa (Lauraceae)

1982 ◽  
Vol 35 (3) ◽  
pp. 557 ◽  
Author(s):  
WM Bandaranayake ◽  
JE Banfield ◽  
DSC Black
Keyword(s):  
Title Compound ◽  
Enoic Acid ◽  
Compound A ◽  
Spectroscopic Evidence

The structure (5) of the title compound, a vinylog of endiandric acid, is proposed on the basis of chemical and spectroscopic evidence.

scholarly journals catena-Poly[[[bis(acetonitrile-κN)(4,4′-dimethoxy-2,2′-bipyridine-κ2 N,N′)copper(II)]-μ-trifluoromethanesulfonato-κ2 O:O′] trifluoromethanesulfonate]

IUCrData ◽  
2020 ◽  
Vol 5 (10) ◽  
Author(s):  
Rafael A. Adrian ◽  
Diego R. Hernandez ◽  
Hadi D. Arman
Keyword(s):  
Hydrogen Bonds ◽  
Title Compound ◽  
Metal Organic Frameworks ◽  
Starting Material ◽  
Compound A ◽  
Distorted Octahedral ◽  
Weak Hydrogen Bonds ◽  
Polymeric Chains ◽  
Metal Organic ◽  
Bipyridine Ligand

The central copper(II) atom of the title salt, {[Cu(CF3SO3)(CH3CN)2(C12H12N2O2)](CF3SO3)} n or [[Cu(CH3CN)2(diOMe-bpy)(CF3SO3)](CF3SO3)] n where diOMe-bpy is 4,4′-dimethoxy-2,2′-bipyridine, C12H12N2O2, is sixfold coordinated by the N atoms of the chelating bipyridine ligand, the N atoms of two acetonitrile molecules, and two trifluoromethanesulfonate O atoms in a tetragonally distorted octahedral shape. The formation of polymeric chains [Cu(CH3CN)2(diOMe-bpy)(CF3SO3)]+ n leaves voids for the non-coordinating trifluoromethanesulfonate anions that interact with the complex through weak hydrogen bonds. The presence of weakly coordinating ligands like acetonitrile and trifluoromethanesulfonate makes the title compound a convenient starting material for the synthesis of novel metal–organic frameworks.

scholarly journals rac-(E,trans)-4-Bromo-10,10-dimethyl-9,11-dioxabicyclo[6.3.0]undec-4-ene

IUCrData ◽  
2020 ◽  
Vol 5 (9) ◽  
Author(s):  
Dieter Schollmeyer ◽  
Maximilian Heidrich ◽  
Heiner Detert
Keyword(s):  
Hydrogen Bonds ◽  
Title Compound ◽  
Boat Conformation ◽  
Compound A ◽  
Envelope Conformation ◽  
Twist Boat

In the title compound, a cyclooctene ring in a twist-boat conformation and a dioxolane ring with a distorted envelope conformation are annulated in a trans configuration. Alternating strands of single enantiomers build up the crystal. Within the strands, the molecules are connected by weak C—H...O hydrogen bonds.

scholarly journals (2Sp,4R,8Sp)-4-Methyl-1-phenyl-diferroceno-5-Z-ethylene-1-phosphinoxide

Molbank ◽  
10.3390/m1105 ◽  
2020 ◽  
Vol 2020 (1) ◽  
pp. M1105 ◽  
Author(s):  
Philipp Honegger ◽  
Michael Widhalm
Keyword(s):  
Reaction Mechanism ◽  
Asymmetric Catalysis ◽  
Title Compound ◽  
Compound A ◽  
Stereoselective Reaction

We present a synthesis of the title compound, a homochiral diferroceno cycle intended for use in asymmetric catalysis. We present a hydrovinylation protocol, which allows the production of the title compound in two steps from a known diferrocenyl precursor. We obtained one of two possible diastereomers selectively and propose a plausible regio- and stereoselective reaction mechanism.

X-Ray Structure of 6(E)-[2(Z)-(Hydroxyimino)-2-phenylethyIidene]- 7,7,8,8,9,9-hexamethyl-3-phenyl-1,2-oxazaspiro[4.4]non-2-ene

2001 ◽  
Vol 56 (4-5) ◽  
pp. 354-358
Author(s):  
Teresa Borowiak ◽  
Irena Wolska ◽  
Herbert Mayr ◽  
Janusz Baran
Keyword(s):  
Title Compound ◽  
Crystallographic Structure ◽  
Steric Strain ◽  
Orthorhombic Space Group ◽  
Compound A ◽  
X Ray ◽  
Cell Dimensions ◽  
Highly Strained ◽  
Centrosymmetric Dimers ◽  
Opposite Chirality

Abstract The X-ray crystallographic structure of the title compound, a product of a 1,3-dipolar cy­ cloaddition reaction of benzonitrile oxide to 3,3,4,4,5,5-hexamethyl-1,2-bis(methylene)cyclopentane, has been determined. Colourless plates crystallize in the orthorhombic space group Pbca with cell dimensions a = 13.698(2), b = 11.836(2), c = 29.157(4) Å, V= 4727.2(1.2)Å3, Z = 8, 3736 reflections, final R(F) = 0.063 and wR(F2) = 0.166. The crystals are racemic, the molecules of opposite chirality form centrosymmetric dimers via intermolecular hydro­ gen bonds O-H···N between their oxime groups. The molecules are highly strained and the geometrical consequences of the steric strain are discussed.

scholarly journals Crystal structure of (E)-hex-2-enoic acid

2015 ◽  
Vol 71 (5) ◽  
pp. o323-o323 ◽  
Author(s):  
Tim Peppel ◽  
Marcel Sonneck ◽  
Anke Spannenberg ◽  
Sebastian Wohlrab
Keyword(s):  
Crystal Structure ◽  
Carboxylic Acid ◽  
Hydrogen Bonds ◽  
Title Compound ◽  
Enoic Acid ◽  
Acid Molecule ◽  
Unsaturated Carboxylic Acid ◽  
Compound C

The crystal structure of the title compound, C6H10O2, an α,β-unsaturated carboxylic acid, displays carboxylic acid inversion dimers linked by pairs of O—H...O hydrogen bonds. The packing is characterized by layers of acid dimers. All the non-H atoms of the (E)-hex-2-enoic acid molecule lie almost in the same plane (r.m.s. deviation for the non-H atoms = 0.018 Å).

The pyrolysis of 6a,11b-Dihydro-7-thiabenzo[c]fluorene 7,7-dioxide and some of its derivatives

1968 ◽  
Vol 21 (6) ◽  
pp. 1571 ◽  
Author(s):  
W Davies ◽  
BC Ennis ◽  
QN Porter
Keyword(s):  
Free Radical ◽  
Title Compound ◽  
Compound A ◽  
Radical Rearrangement ◽  
Rearrangement Mechanism ◽  
Derivatives Of

It is shown that heat in the absence of a solvent converts the title compound into benzo[k,l]thioxanthen 7,7-dioxide, 7-thiabenzo[c]fluorene, and o-(1-naphthyl)-benzenesulphonic acid. From these results and a consideration of the related pyrolyses of the 3,10- and 1,8-dimethyl derivatives of the title compound, a free-radical rearrangement mechanism is proposed to explain the observations.

Heteroanthracyclines. 2. 4-Demethoxythioxanthodaunomycinone (7,8,9,10-tetrahydrobenzo(b)-6,7,9,11-tetrahydroxy-9-acetylthioxanthen-12-one)

1984 ◽  
Vol 62 (8) ◽  
pp. 1600-1607 ◽  
Author(s):  
Chiu-Ming Wong ◽  
Ai-Qiao Mi ◽  
Jiali Ren ◽  
Wasimul Haque ◽  
Hing-Yat Lam ◽  
...  
Keyword(s):  
Sulfuric Acid ◽  
Acid Hydrolysis ◽  
Title Compound ◽  
Compound A ◽  
Concentrated Sulfuric Acid

The title compound, a new heteroanthracyclinone was synthesized in five steps starting with 5,8-dimethoxy-2-acetyltetralin (15). Reaction of 2,2′-dithiosalicylic acid (16) with the tetralin 15 in concentrated sulfuric acid gave the tetracyclic thioxanthones 17 and 18. Conversion of 18 to 24 by demethylation and realkylation followed by oxidation and acid hydrolysis gave the title compound 27.

scholarly journals Preparation, Spectroscopy, Physicochemical Properties and X-ray Structure Analysis of 3,4,5-TrimethoxyN(2-hydroxybenzylidene) aniline

2009 ◽  
Vol 6 (4) ◽  
pp. 1103-1108 ◽  
Author(s):  
Kodjo Charles Guillaume ◽  
Zabri Herve ◽  
Benie Anoubile ◽  
Estienne Jacques
Keyword(s):  
Ir Spectroscopy ◽  
Physicochemical Properties ◽  
Title Compound ◽  
Electronic Spectroscopy ◽  
Visible Spectroscopy ◽  
Compound A ◽  
X Ray ◽  
H Nmr ◽  
Uv Visible ◽  
Single Crystal Analysis

3,4,5-TrimethoxyN-(salicylidene) aniline was synthesized and characterized by IR spectroscopy,1H NMR and x-ray single crystal analysis. UV-visible spectroscopy was used for physicochemical tests. X-ray data reveals that the crystalline network cohesion of this compound is essentially assured by CH/pi type hydrogen bounds. It crystallized in the orthorhombic Pbcn space group. Electronic spectroscopy shows that the title compound doesn't present photochromic property but thermochromic one. Intermolecular interactions analysis confirms for this compound a thermochromic structural predisposition.

scholarly journals Crystal structure of the high-energy-density material guanylurea dipicrylamide

2014 ◽  
Vol 70 (8) ◽  
pp. 111-114 ◽  
Author(s):  
Raik Deblitz ◽  
Cristian G. Hrib ◽  
Liane Hilfert ◽  
Frank T. Edelmann
Keyword(s):  
Crystal Structure ◽  
Solid State ◽  
Title Compound ◽  
Crystal Packing ◽  
High Energy ◽  
High Energy Density ◽  
Metathesis Reaction ◽  
Compound A ◽  
High Energy Density Material ◽  
Secondary Explosive

The title compound, 1-carbamoylguanidinium bis(2,4,6-trinitrophenyl)amide [H2NC(=O)NHC(NH2)2]+[N{C6H2(NO2)3-2,4,6}2]−(= guanylurea dipicrylamide), was prepared as dark-red block-like crystals in 70% yield by salt-metathesis reaction between guanylurea sulfate and sodium dipicrylamide. In the solid state, the new compound builds up an array of mutually linked guanylurea cations and dipicrylamide anions. The crystal packing is dominated by an extensive network of N—H...O hydrogen bonds, resulting in a high density of 1.795 Mg m−3, which makes the title compound a potential secondary explosive.

scholarly journals Molekül- und Kristallstruktur des 1.5-Dichlor-3.7-bis(trifluormethyl)-4.8-bis(2′.6′-dimethylphenyl)-2.6.9-trioxa- 4.8-diaza-1.5-diborabicyclo [3.3.1] nonadiens / Molecular and Crystal Structure of 1,5-Dichloro-3,7-bis(trifluoromethyl)-4,8-bis(2′,6′-dimethylphenyl)-2,6,9-trioxa-4,8-diaza- 1,5-diborabicyclo[3,3,1 ]nonadiene

1980 ◽  
Vol 35 (12) ◽  
pp. 1499-1502 ◽  
Author(s):  
William Clegg ◽  
Mathias Noltemeyer ◽  
George M. Sheldrick ◽  
Walter Maringgele ◽  
Anton Meller
Keyword(s):  
Crystal Structure ◽  
Title Compound ◽  
Membered Ring ◽  
The Other ◽  
Molecular And Crystal Structure ◽  
Compound A ◽  
Space Group ◽  
X Ray

The structure of the title compound (a = 1185.4, b = 1197.7, c = 1764.8 pm, β = 73.96°, space group P21/c) has been determined from X-ray diffractometer data. The molecule is structurally analogous to the tetraborate ion [B4O7]2-. The eight-membered ring is folded by 104° about the B - B vector. The boron atoms are more strongly bonded to the bridging oxygen [B-O(B) 139 pm] than to the other atoms [B-O(C) 155 pm, B-N 160 pm, B-Cl 182 pm].

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