Structural Investigation of Weak Intermolecular Interactions (Hydrogen and Halogen Bonds) in Fluorine-Substituted Benzimidazoles

2014 ◽  
Vol 14 (7) ◽  
pp. 3499-3509 ◽  
Author(s):  
Marta Pérez-Torralba ◽  
M. Ángeles García ◽  
Concepción López ◽  
M. Carmen Torralba ◽  
M. Rosario Torres ◽  
...  
Keyword(s):  
Intermolecular Interactions ◽  
Structural Investigation ◽  
Halogen Bonds ◽  
Weak Intermolecular Interactions

Structural Investigation of Weak Intermolecular Interactions in Fluorine Substituted Isomeric N-Benzylideneanilines

2012 ◽  
Vol 12 (10) ◽  
pp. 5096-5110 ◽  
Author(s):  
Gurpreet Kaur ◽  
Piyush Panini ◽  
Deepak Chopra ◽  
Angshuman Roy Choudhury
Keyword(s):  
Intermolecular Interactions ◽  
Structural Investigation ◽  
Weak Intermolecular Interactions

Halogen bonds and σ-holes

2017 ◽  
Vol 203 ◽  
pp. 9-27 ◽  
Author(s):  
Timothy Clark
Keyword(s):  
Special Reference ◽  
Intermolecular Interactions ◽  
Measurable Quantity ◽  
Coulomb Interactions ◽  
Halogen Bonds ◽  
Bonding Theory ◽  
Weak Intermolecular Interactions ◽  
Different Levels ◽  
Physical Principles

The models behind simple bonding theory and the origins of some components often proposed to be involved in weak intermolecular bonds are described with special reference to σ-hole bonding, of which halogen bonds are a subset. A protocol for the analysis of weak intermolecular interactions is proposed on the basis of sound physical principles. This protocol uses three different levels of interaction; “permanent” Coulomb interactions between unperturbed monomers, relaxed Coulomb interactions and dispersion. Of the three, only dispersion is not a real, measurable quantity. It is, however, included in order to describe interactions that cannot be treated entirely by the first two levels.

scholarly journals Convenient Access to Functionalized Non-Symmetrical Atropisomeric 4,4′-Bipyridines

Compounds ◽  
2021 ◽  
Vol 1 (2) ◽  
pp. 58-74
Author(s):  
Emmanuel Aubert ◽  
Emmanuel Wenger ◽  
Paola Peluso ◽  
Victor Mamane
Keyword(s):  
Solid State ◽  
Intermolecular Interactions ◽  
Medicinal Chemistry ◽  
Crystal Packing ◽  
Cross Coupling ◽  
Coupling Reactions ◽  
Halogen Bonds ◽  
Cross Coupling Reactions ◽  
Cyano Groups ◽  
Post Functionalization

Non-symmetrical chiral 4,4′-bipyridines have recently found interest in organocatalysis and medicinal chemistry. In this regard, the development of efficient methods for their synthesis is highly desirable. Herein, a series of non-symmetrical atropisomeric polyhalogenated 4,4′-bipyridines were prepared and further functionalized by using cross-coupling reactions. The desymmetrization step is based on the N-oxidation of one of the two pyridine rings of the 4,4′-bipyridine skeleton. The main advantage of this methodology is the possible post-functionalization of the pyridine N-oxide, allowing selective introduction of chlorine, bromine or cyano groups in 2- and 2′-postions of the chiral atropisomeric 4,4′-bipyridines. The crystal packing in the solid state of some newly prepared derivatives was analyzed and revealed the importance of halogen bonds in intermolecular interactions.

On the influence of weak intermolecular interactions on the molecular crystal density of 1,3,5-triazine trinitroalkyl derivatives

2021 ◽  
Vol 57 (3) ◽  
pp. 266-273
Author(s):  
Kyrill Yu. Suponitsky ◽  
Aleksei A. Anisimov ◽  
Ivan V. Ananyev ◽  
Alexander A. Lashakov ◽  
Svetlana V. Osintseva ◽  
...  
Keyword(s):  
Intermolecular Interactions ◽  
Molecular Crystal ◽  
Weak Intermolecular Interactions ◽  
Crystal Density
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