Crystal Structures of Complex Lanthanide Sulfides With Built-in Non-Commensurability

1992 ◽  
Vol 45 (9) ◽  
pp. 1451 ◽  
Author(s):  
E Makovicky
Keyword(s):  
Crystal Structures ◽  
Lanthanide Ions ◽  
Structure Building ◽  
Lanthanide Sulfides ◽  
Derivatives Of ◽  
Trigonal Prismatic ◽  
Complex Fragment ◽  
Important Structure

Non-commensurability on the boundaries of adjacent structural layers (rods, blocks) represents an important structure-building principle for several structural families of complex lanthanide sulfides. In the layer-misfit sulfides 'ABS3', pseudotetragonal layers with lanthanide ions alternate with octahedral layers or trigonal prismatic layers. Among more complex, fragment-recombination structures based on similar layer strips, (A) a family of derivatives of the structure of Yb3S4, (B) structures that represent anti-(out-of-)phase modulated non-commensurate layer sequences, and (c) lanthanide sulfosalts (with bismuth and antimony) are described in some detail. Layer-match modes, their relationships to the ratios of cation radii, and relations to simpler archetypal structures are analysed.

scholarly journals Functionalised Terpyridines and Their Metal Complexes—Solid-State Interactions

Chemistry ◽  
2021 ◽  
Vol 3 (1) ◽  
pp. 199-227
Author(s):  
Young Hoon Lee ◽  
Jee Young Kim ◽  
Sotaro Kusumoto ◽  
Hitomi Ohmagari ◽  
Miki Hasegawa ◽  
...  
Keyword(s):  
Solid State ◽  
Metal Complexes ◽  
Crystal Structures ◽  
Weak Interactions ◽  
Dispersion Interactions ◽  
Derivatives Of

Analysis of the weak interactions within the crystal structures of 33 complexes of various 4′-aromatic derivatives of 2,2′:6′,2″-terpyridine (tpy) shows that interactions that exceed dispersion are dominated, as expected, by cation⋯anion contacts but are associated with both ligand–ligand and ligand–solvent contacts, sometimes multicentred, in generally complicated arrays, probably largely determined by dispersion interactions between stacked aromatic units. With V(V) as the coordinating cation, there is evidence that the polarisation of the ligand results in an interaction exceeding dispersion at a carbon bound to nitrogen with oxygen or fluorine, an interaction unseen in the structures of M(II) (M = Fe, Co, Ni, Cu, Zn, Ru and Cd) complexes, except when 1,2,3-trimethoxyphenyl substituents are present in the 4′-tpy.

The Through-Bond Interaction of a Sulfur Lone Pair with Oxygenated Substituents in the Thiacyclohexane Framework

2005 ◽  
Vol 58 (7) ◽  
pp. 531
Author(s):  
Laura Andrau ◽  
Jonathan M. White
Keyword(s):  
Low Temperature ◽  
Crystal Structures ◽  
Bond Distance ◽  
Lone Pair ◽  
X Ray ◽  
Ester Derivative ◽  
Bond Interaction ◽  
Derivatives Of ◽  
Electron Demand

Low-temperature X-ray crystal structures were determined on a range of derivatives of 4-thiacyclohexanol 5a of varying electron demand with a view to finding evidence for a through-bond interaction between the sulfur lone pair and the oxygenated substituent. In contrast to earlier suggestions, plots of C–OR bond distance versus pKa (ROH) showed that any interaction between the sulfur and the OR group is unlikely to be of a through-bond origin. Furthermore, unimolecular solvolysis rate measurements on the nosylate ester derivative 5g showed that the sulfur actually retards the reaction slightly in comparison with the corresponding sulfur-free analogue 6.

Dicationic derivatives of dinaphthotetraaza[14]annulene: synthesis, crystal structures and the preliminary evaluation of their DNA binding properties

Tetrahedron ◽  
2015 ◽  
Vol 71 (24) ◽  
pp. 4163-4173 ◽  
Author(s):  
Alicja Kaźmierska ◽  
Marlena Gryl ◽  
Katarzyna Stadnicka ◽  
Lesław Sieroń ◽  
Andrzej Eilmes ◽  
...  
Keyword(s):  
Dna Binding ◽  
Crystal Structures ◽  
Preliminary Evaluation ◽  
Binding Properties ◽  
Dna Binding Properties ◽  
Derivatives Of

Crystal Structures of 5α,6α-Epoxy and 2,3-Dihydro Derivatives of Physalin B, a 13,14-Seco-16,24-cyclosteroid, and Their1H NMR Spectral Analysis

1994 ◽  
Vol 67 (1) ◽  
pp. 222-226 ◽  
Author(s):  
Masao Kawai ◽  
Bunsho Makino ◽  
Tooru Taga ◽  
Yoshihisa Miwa ◽  
Tatsuo Yamamoto ◽  
...  
Keyword(s):  
Spectral Analysis ◽  
Crystal Structures ◽  
Derivatives Of
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