scholarly journals Bond Formation upon Water Removal in an Unusual “Pseudo”-Topotactic Reaction Investigated by Single-Crystal Structure and in Situ Synchrotron X-ray Powder Diffraction Analysis

2019 ◽  
Vol 19 (10) ◽  
pp. 5743-5750 ◽  
Author(s):  
Joanna Dopta ◽  
Anna-Lena Hansen ◽  
Nicole Pienack ◽  
Lisa K. Mahnke ◽  
Helge Reinsch ◽  
...  
Keyword(s):  
Crystal Structure ◽  
Single Crystal ◽  
Diffraction Analysis ◽  
Powder Diffraction ◽  
Bond Formation ◽  
Single Crystal Structure ◽  
Water Removal ◽  
X Ray ◽  
Topotactic Reaction

Formation and Crystal Structures of 9-Methylanthracene Photodimer and Lepidopterene

2003 ◽  
Vol 2003 (7) ◽  
pp. 445-447
Author(s):  
Qing-Xiang Liu ◽  
Hai-Bin Song ◽  
Feng-Bo Xu ◽  
Qing-Shan Li ◽  
Xian-Shun Zeng ◽  
...  
Keyword(s):  
Crystal Structure ◽  
Single Crystal ◽  
Diffraction Analysis ◽  
Crystal Structures ◽  
Single Crystal Structure ◽  
X Ray Diffraction ◽  
X Ray

The 9-methylanthracene photodimer (6) and lepidopterene (7) were prepared by a photo-dimerisation reaction of 1-(9-anthracenylmethyl)-3-ethylimidazolium iodide (1) or α, α'-di[1-(9-anthracenylmethyl) imidazolium]- p-xylene dibromide (2). Compound 6 is derived from the head-tail [4+4] cycloaddition of two molecular 9-methylanthracenes, and the butterfly-shaped compound 7 is formed via the 9-methyleneanthracene radical in a two steps precess. The single crystal structure of 6 was determined by X-ray diffraction analysis. The changes of luminescent intensities of compounds 1, 2 and 7 are reported.

X-ray powder diffraction analysis of adducts triglycine fluoroberyllic acid and triglycine selenic acid for pyroelectric application

2001 ◽  
Vol 16 (3) ◽  
pp. 167-169 ◽  
Author(s):  
Yunxia Che ◽  
Jimin Zheng ◽  
Jianmin Hao ◽  
Lianqing Chu
Keyword(s):  
Crystal Structure ◽  
Single Crystal ◽  
Diffraction Analysis ◽  
Least Squares ◽  
Powder Diffraction ◽  
Structure Data ◽  
Crystal Structure Data ◽  
Least Squares Method ◽  
Lattice Parameters ◽  
X Ray

Two adducts (NH2CH2COOH)3⋅H2BeF4(TGFb) and (NH2CH2COOH)3⋅H2SeO4(TGSe) were obtained and characterized by X-ray powder diffraction. The samples were indexed using the TREOR program [Werner, Z. Kristallogr. Kristallogeom. Kristallphys. Kristallchem. 120, 375–387 (1964)] on a monoclinic unit cell. The lattice parameters of adducts TGFb and TGSe were refined by a least-squares method using the Lattice Constant Refinement Program of the Rikagu software. The refined lattice parameters are a=9.1589(9) Å, b=12.6204(13) Å, c=5.6966(8) Å, β=105.451(9)° for TGFb. The Smith and Snyder figure [Smith and Snyder, J. Appl. Crystallogr. 12, 60–65 (1979)] is F30=39.4(0.0141,54). The refined lattice parameters a=9.5063(11) Å, b=12.8281(10) Å, c=5.8682(7) Å, β=110.353(77)° for TGSe. The Smith and Snyder figure is F30=39(0.0106,73). The powder diffraction results are in agreement with those obtained from single crystal structure data.

Powder Diffraction Data of Three Tetrahydropyridinyl Oxime Cognition Activators of Formula C8H15N2O+Cl−

1992 ◽  
Vol 7 (3) ◽  
pp. 170-173 ◽  
Author(s):  
G. Bandoli ◽  
M. Nicolini ◽  
A. Ongaro
Keyword(s):  
Crystal Structure ◽  
Single Crystal ◽  
Single Crystals ◽  
Powder Diffraction ◽  
Diffraction Data ◽  
Single Crystal Structure ◽  
Powder Diffraction Data ◽  
X Ray ◽  
Data Comparison ◽  
Structure Determinations

AbstractIndexed X-ray powder diffraction data are reported for three tetrahydropyridinyl oxime cognition activators. For these drugs of formula C8H15N2O+Cl− powder diffraction data calculated from single crystal structure determinations are also presented and compared to the experimentally observed powder diffraction data. Comparison of experimental and calculated powder patterns assures that single crystals are good representatives of the commercial powdered samples.

Single Crystal Growth of High-Pressure Phases of Ice and Salt Hydrate Far Below the Original Melting Point by Mixing Alcohol: Crystal Structure Determination of Magnesium Chloride Heptahydrate

2020 ◽  
Author(s):  
Keishiro Yamashita ◽  
Kazuki Komatsu ◽  
Hiroyuki Kagi
Keyword(s):  
Crystal Structure ◽  
High Pressure ◽  
Crystal Growth ◽  
Single Crystal ◽  
Room Temperature ◽  
Growth Technique ◽  
Salt Hydrate ◽  
X Ray

An crystal-growth technique for single crystal x-ray structure analysis of high-pressure forms of hydrogen-bonded crystals is proposed. We used alcohol mixture (methanol: ethanol = 4:1 in volumetric ratio), which is a widely used pressure transmitting medium, inhibiting the nucleation and growth of unwanted crystals. In this paper, two kinds of single crystals which have not been obtained using a conventional experimental technique were obtained using this technique: ice VI at 1.99 GPa and MgCl<sub>2</sub>·7H<sub>2</sub>O at 2.50 GPa at room temperature. Here we first report the crystal structure of MgCl2·7H2O. This technique simultaneously meets the requirement of hydrostaticity for high-pressure experiments and has feasibility for further in-situ measurements.

Cobalt(II) complexes of the antibiotic sulfadiazine, the X-ray single crystal structure of [Co(C10H9N4O2S)2(CH3OH)2]

2006 ◽  
Vol 359 (10) ◽  
pp. 3111-3116 ◽  
Author(s):  
Peter A. Ajibade ◽  
Gabriel A. Kolawole ◽  
Paul O’Brien ◽  
Madeleine Helliwell ◽  
James Raftery
Keyword(s):  
Crystal Structure ◽  
Single Crystal ◽  
Single Crystal Structure ◽  
X Ray
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