The X-ray diffraction crystal structure determination and electron impact fragmentations of the gaseous ions of 3-(p-chlorophenyl)-1-methyltriazene-1-oxide and its 3-methyl derivative

1991 ◽  
Vol 21 (6) ◽  
pp. 721-728 ◽  
Author(s):  
G. D. Andreetti ◽  
F. Ugozzoli ◽  
A. G. Giumanini ◽  
P. Traldi ◽  
L. Lassiani ◽  
...  
Keyword(s):  
Crystal Structure ◽  
Electron Impact ◽  
Structure Determination ◽  
Crystal Structure Determination ◽  
X Ray Diffraction ◽  
Methyl Derivative ◽  
X Ray

Crystal structure determination of Ag2Ga by single crystal X-ray diffraction

1998 ◽  
Vol 213 (12) ◽  
Author(s):  
A. E. Gunnæs ◽  
A. Olsen ◽  
P. T. Zagierski ◽  
B. Klewe ◽  
O. B. Karlsen ◽  
...  
Keyword(s):  
Crystal Structure ◽  
Single Crystal ◽  
Structure Determination ◽  
Crystal Structure Determination ◽  
X Ray Diffraction ◽  
X Ray

AbstractThe crystal structure of

scholarly journals Some reflections on symmetry: pitfalls of automation and some illustrative examples

2019 ◽  
Vol 75 (12) ◽  
pp. 1812-1819 ◽  
Author(s):  
William Clegg
Keyword(s):  
Crystal Structure ◽  
Structure Determination ◽  
Crystal Structure Determination ◽  
Structure Validation ◽  
X Ray Diffraction ◽  
X Ray ◽  
Structure Determinations ◽  
Basic Concepts ◽  
Software Automation

In the context of increasing hardware and software automation in the process of crystal structure determination by X-ray diffraction, and based on conference sessions presenting some of the experience of senior crystallographers for the benefit of younger colleagues, an outline is given here of some basic concepts and applications of symmetry in crystallography. Three specific examples of structure determinations are discussed, for which an understanding of these aspects of symmetry avoids mistakes that can readily be made by reliance on automatic procedures. Topics addressed include pseudo-symmetry, twinning, real and apparent disorder, chirality, and structure validation.

Die Kristallstruktur von [Na(12-Krone-4)2+]2Se82- · (Se6, Se7) / The Crystal Structure of [Na(12-Crown-4)2+]2Se82- · (Se6, Se7)

1991 ◽  
Vol 46 (10) ◽  
pp. 1287-1292 ◽  
Author(s):  
Rüdiger Staffel ◽  
Ulrich Müller ◽  
Andreas Ahle ◽  
Kurt Dehnicke
Keyword(s):  
Crystal Structure ◽  
Structure Determination ◽  
Title Compound ◽  
Crystal Structure Determination ◽  
X Ray Diffraction ◽  
Space Group ◽  
X Ray ◽  
Disordered Structure

The title compound was prepared from sodium polyselenide and 12-crown-4 in DMF solution in the presence of cerium(III)chloride in the form of black needles. The crystal structure determination by X-ray diffraction shows a partially disordered structure, in which the anionic units Se82- · Se7 and Se82- · Se6 are present in the ratio 0.72/0.28. These units are associated to layers parallel to (100); the layers alternate with pseudohexagonal layers of [Na(12-crown-4)2]+ ions. Space group P1̅, Z = 2, 3903 observed unique reflections, R = 0.114, wR= 0.084. Lattice dimensions at -65°C: a = 1247.9(3), b = 1367.8(8), c = 1660(1) pm, α = 94.65(5), β = 98.94(3), γ = 91.10(3)°.

Azine bridged silver coordination polymers: Powder X-ray diffraction route to crystal structure determination of silver benzotriazole

2006 ◽  
Vol 179 (4) ◽  
pp. 1053-1059 ◽  
Author(s):  
Manju Rajeswaran ◽  
Thomas N. Blanton ◽  
David J. Giesen ◽  
David R. Whitcomb ◽  
Nicholas Zumbulyadis ◽  
...  
Keyword(s):  
Crystal Structure ◽  
Coordination Polymers ◽  
Structure Determination ◽  
Crystal Structure Determination ◽  
X Ray Diffraction ◽  
X Ray
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