Isolation and X-ray crystal structure of a 2:1 complex between picric acid and dibenzo-24-crown-8; an example of a sandwich structure

1986 ◽  
pp. 253 ◽  
Author(s):  
Howard M. Colquhoun ◽  
Simon M. Doughty ◽  
J. Fraser Stoddart ◽  
Alexandra M. Z. Slawin ◽  
David J. Williams
Keyword(s):  
Crystal Structure ◽  
Sandwich Structure ◽  
Picric Acid ◽  
X Ray

ChemInform Abstract: Isolation and X-Ray Crystal Structure of a 2:1 Complex Between Picric Acid and Di- benzo-24-crown-8.

1986 ◽  
Vol 17 (23) ◽  
Author(s):  
H. M. COLQUHOUN ◽  
S. M. DOUGHTY ◽  
J. F. STODDART ◽  
A. M. Z. SLAWIN ◽  
D. J. WILLIAMS
Keyword(s):  
Crystal Structure ◽  
Picric Acid ◽  
X Ray

Synthesis, Crystal Structure and Photoluminescent Properties of a New Uranium-Containing Silicotungstate

2013 ◽  
Vol 750-752 ◽  
pp. 1840-1843
Author(s):  
Rong Xin Tan ◽  
Shu Xin Cui ◽  
Hui Wang ◽  
Ya Ping Jiang ◽  
Wen Zhi Song
Keyword(s):  
Crystal Structure ◽  
Aqueous Solution ◽  
Infrared Spectra ◽  
Elemental Analysis ◽  
Sandwich Structure ◽  
Sodium Ions ◽  
Uranyl Compounds ◽  
Spectra Analysis ◽  
X Ray ◽  
Triclinic System

A new uranium-containing silicotungstate A-β-Na14[Na2(UO2)2(SiW9O34)2]·43H2O (1) was synthesized in an aqueous solution. The compound was characterized by elemental analysis and infrared spectra analysis. A single-crystal X-ray analysis was carried out on crystal (1) which crystallizes in triclinic system, space group p ī, with a = 13.386 Å, b = 13.506 Å, c = 16.183 Å, α = 85.337o, β = 73.608o γ = 64.833o and Z = 1. Polyanion (1) consists of two A-β-SiW9 units which sandwich two uranium and two sodium ions, leading to a Keggin-type sandwich structure. The photoluminescent spectrum of (1) shows typical emission features of uranyl compounds.

scholarly journals Synthesis and crystal structures of 2-(ferrocenylcarbonyl)benzoic acid and 3-ferrocenylphthalide

2020 ◽  
Vol 76 (7) ◽  
pp. 1163-1167
Author(s):  
Uttam R. Pokharel ◽  
Jonathan T. Bergeron ◽  
Frank R. Fronczek
Keyword(s):  
Crystal Structure ◽  
Benzoic Acid ◽  
Sandwich Structure ◽  
Room Temperature ◽  
Crystal Packing ◽  
Molecular Structures ◽  
X Ray Diffraction ◽  
Centrosymmetric Dimer ◽  
X Ray ◽  
Graph Set

The title compounds, 2-(ferrocenylcarbonyl)benzoic acid, [Fe(C5H5)(C13H9O3)], 1, and 3-ferrocenylphthalide [systematic name: 3-ferrocenyl-2-benzofuran-1(3H)-one], [Fe(C5H5)(C13H9O2)], 2, have been synthesized and structurally characterized by single-crystal X-ray diffraction. The crystal structure of compound 1 was solved recently at room temperature [Qin, Y. (2019). CSD Communication (CCDC deposition number 1912662). CCDC, Cambridge, England]. Here we report a redetermination of its crystal structure at 90 K with improved precision by a factor of about three. The molecular structures of both compounds exhibit a typical sandwich structure. In the crystal packing of compound 1, each molecule engages in intermolecular hydrogen bonding, forming a centrosymmetric dimer with graph-set notation R 2 2 (8) and an O...O distance of 2.6073 (15) Å. There are weak C—H...O and C—H...π interactions in the crystal packing of compound 2. The phthalide moiety in 2 is oriented roughly perpendicular to the ferrocene backbone, with a dihedral angle of 77.4 (2)°.

Pentakis(Methoxycarbonyl)-Cyclopentadiene Chemistry .X. Crystal-Structure of the Charge-Transfer Complex Tropylium Pentakis(Methoxycarbonyl)Cyclopentadienide

1986 ◽  
Vol 39 (1) ◽  
pp. 165 ◽  
Author(s):  
MI Bruce ◽  
PA Humphrey ◽  
BW Skelton ◽  
AH White
Keyword(s):  
Crystal Structure ◽  
Charge Transfer ◽  
Single Crystal ◽  
Structure Determination ◽  
Sandwich Structure ◽  
Charge Transfer Complex ◽  
Acetone Solution ◽  
Polar Solvents ◽  
X Ray

The compound [C7H7][C5(CO2Me)5] forms very long but thin orange-red needles, which, in contrast to a previous report, form orange-red to deep red solutions in polar solvents. Decolorization of an acetone solution occurs on standing, but the white compound so obtained has not been identified. Single-crystal X-ray structure determination at 295 K (R = 0.078 for 1030 'observed' reflections) shows the presence of an infinite sandwich structure comprising columns of interleaved anion and cation planes normal to b. Crystals are rthorhombic, Pbcn , a 18.206(6), b 13.954(12), c 17.243(5)Ǻ, Z 8.

Synthesis and Crystal Structure of 'Thorium Hydroxy Picrate Hexadecahydrate' ('Basic Thorium Picrate')

1995 ◽  
Vol 48 (7) ◽  
pp. 1349 ◽  
Author(s):  
JM Harrowfield ◽  
BJ Peachey ◽  
BW Skelton ◽  
AH White
Keyword(s):  
Crystal Structure ◽  
Single Crystal ◽  
Title Compound ◽  
Room Temperature ◽  
Picric Acid ◽  
Coordination Geometry ◽  
Synthesis And Crystal Structure ◽  
X Ray ◽  
The Subject ◽  
Hydroxy Groups

The title compound, crystallized from the solution produced by dissolution of thorium carbonate in hot, aqueous picric acid ( Hpic , 2,4,6-trinitrophenol) as pale yellow needles, has been the subject of a room-temperature single-crystal X-ray study and found to be [( pic )(H2O)6Th(μ-OH)2Th(OH2)6( pic )]( pic )4.20H2O. The compound is triclinic, Pī , a 14.651(4), b 12.877(6), c 11.838(2) Ǻ, α 69.71(3), β 75.93(2), γ 80.10(3); Z = 1 ( dimeric ) f.u .; conventional R on |F| at convergence was 0.032 for 8281 'observed' (I > 3σ(I)) reflections. The thorium is nine-coordinate Th (O- pic )(μ-O)2(OH2)6, the dimer being centrosymmetric and the coordination geometry about thorium being approximately that of a singly capped square antiprism , the capping atom (over a square face) being the slightly more remote of the bridging hydroxy groups. Th -μ-OH are 2.366(3), 2.381(3), Th-OH2 2.479(5)-2.534(4) and Th-O( pic ) 2.366(3) Ǻ.

A study on α-RuCl3 crystal structure by scanning tunneling microscopy

1989 ◽  
Vol 47 ◽  
pp. 30-31
Author(s):  
H.-J. Cantow ◽  
H. Hillebrecht ◽  
S. Magonov ◽  
H. W. Rotter ◽  
G. Thiele
Keyword(s):  
Crystal Structure ◽  
Density Distribution ◽  
Scanning Tunneling Microscopy ◽  
Electron Density ◽  
Structure Determination ◽  
Electron Density Distribution ◽  
Scanning Tunneling ◽  
Monoclinic Space Group ◽  
Tunneling Microscopy ◽  
X Ray

From X-ray analysis, the conclusions are drawn from averaged molecular informations. Thus, limitations are caused when analyzing systems whose symmetry is reduced due to interatomic interactions. In contrast, scanning tunneling microscopy (STM) directly images atomic scale surface electron density distribution, with a resolution up to fractions of Angstrom units. The crucial point is the correlation between the electron density distribution and the localization of individual atoms, which is reasonable in many cases. Thus, the use of STM images for crystal structure determination may be permitted. We tried to apply RuCl3 - a layered material with semiconductive properties - for such STM studies. From the X-ray analysis it has been assumed that α-form of this compound crystallizes in the monoclinic space group C2/m (AICI3 type). The chlorine atoms form an almost undistorted cubic closed package while Ru occupies 2/3 of the octahedral holes in every second layer building up a plane hexagon net (graphite net). Idealizing the arrangement of the chlorines a hexagonal symmetry would be expected. X-ray structure determination of isotypic compounds e.g. IrBr3 leads only to averaged positions of the metal atoms as there exist extended stacking faults of the metal layers.

X-ray Crystal Structure of ?9-THC-tosylate

Planta Medica ◽  
2008 ◽  
Vol 74 (03) ◽  
Author(s):  
W Gul ◽  
P Carvalho ◽  
D Slade ◽  
M Avery ◽  
JR Duchek ◽  
...  
Keyword(s):  
Crystal Structure ◽  
X Ray

Crystal structure of an inclusion complex between chiral monoaza-15-crown-5 and S(–)-1-phenyl-ethyl ammonium percholorate

2003 ◽  
Vol 218 (5) ◽  
Author(s):  
Süheyla Özbey ◽  
F. B. Kaynak ◽  
M. Toğrul ◽  
N. Demirel ◽  
H. Hoşgören
Keyword(s):  
Crystal Structure ◽  
Inclusion Complex ◽  
Single Crystal ◽  
X Ray Diffraction ◽  
Space Group ◽  
X Ray ◽  
New Type

AbstractA new type of inclusion complex, S(–)-1 phenyl ethyl ammonium percholorate complex of R-(–)-2-ethyl - N - benzyl - 4, 7, 10, 13 - tetraoxa -1- azacyclopentadecane, has been prepared and studied by NMR, IR and single crystal X-ray diffraction techniques. The compound crystallizes in space group

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