Results 41 to 50 of about 4,166 (227)

Evidence for and evaluation of fluorine–tellurium chalcogen bonding

Chemical Science, 2023
The first in-depth characterization of Te–F chalcogen bonding in solution was achieved by designing and preparing specific Te derivatives followed by their NMR study.
Weiss, Robin, Aubert, Emmanuel, Groslambert, Loic, Pale, Patrick, Mamane, Victor   +4 more
openaire   +2 more sources

Noncovalent Bonds, Spectral and Thermal Properties of Substituted Thiazolo[2,3-b][1,3]thiazinium Triiodides

Crystals, 2019
The interrelation between noncovalent bonds and physicochemical properties is in the spotlight due to the practical aspects in the field of crystalline material design.
Irina Yushina, Natalya Tarasova, Dmitry Kim, Vladimir Sharutin, Ekaterina Bartashevich   +4 more
doaj   +1 more source

The Balance between Hydrogen Bonds, Halogen Bonds, and Chalcogen Bonds in the Crystal Structures of a Series of 1,3,4-Chalcogenadiazoles

Molecules, 2021
In order to explore how specific atom-to-atom replacements change the electrostatic potentials on 1,3,4-chalcogenadiazole derivatives, and to deliberately alter the balance between intermolecular interactions, four target molecules were synthesized and ...
Viraj De Silva, Boris B. Averkiev, Abhijeet S. Sinha, Christer B. Aakeröy   +3 more
doaj   +1 more source

I₂-Catalyzed/DMSO System for the Oxidation of Se-Se Bond Activated by the Use of SynLED Parallel Photoreactor^®

Chemistry Proceedings, 2022
Among the different green oxidative protocols, I2-catalyzed/DMSO systems have recently received considerable attention due to being greener, efficient, atom-economical, low-cost, and offering the possibility to perform reactions under safe and mild ...
Gloria Pizzoli, Federica D’Ottavio, Cecilia Scimmi, Claudio Santi   +3 more
doaj   +1 more source

Synthesis and Biological Evaluation of S-, O- and Se-Containing Dispirooxindoles

Molecules, 2021
A series of novel S-, O- and Se-containing dispirooxindole derivatives has been synthesized using 1,3-dipolar cycloaddition reaction of azomethine ylide generated from isatines and sarcosine at the double C=C bond of 5-indolidene-2-chalcogen-imidazolones
Maksim Kukushkin, Vladimir Novotortsev, Vadim Filatov, Yan Ivanenkov, Dmitry Skvortsov, Mark Veselov, Radik Shafikov, Anna Moiseeva, Nikolay Zyk, Alexander Majouga, Elena Beloglazkina   +10 more
doaj   +1 more source

Comparative Strengths of Tetrel, Pnicogen, Chalcogen, and Halogen Bonds and Contributing Factors

Molecules, 2018
Ab initio calculations are employed to assess the relative strengths of various noncovalent bonds. Tetrel, pnicogen, chalcogen, and halogen atoms are represented by third-row atoms Ge, As, Se, and Br, respectively.
Wenbo Dong, Qingzhong Li, Steve Scheiner
doaj   +1 more source

Chalcogen Bonding Catalysis of a Nitro‐Michael Reaction [PDF]

Angewandte Chemie International Edition, 2019
AbstractChalcogen bonding is the non‐covalent interaction between Lewis acidic chalcogen substituents and Lewis bases. Herein, we present the first application of dicationic tellurium‐based chalcogen bond donors in the nitro‐Michael reaction between trans‐β‐nitrostyrene and indoles.
Patrick Wonner, Alexander Dreger, Lukas Vogel, Elric Engelage, Stefan M. Huber   +4 more
openaire   +3 more sources

Stereoselective Processes Based on σ-Hole Interactions

Molecules, 2022
The σ-hole interaction represents a noncovalent interaction between atoms with σ-hole(s) on their surface (such as halogens and chalcogens) and negative sites.
Paola Peluso, Victor Mamane
doaj   +1 more source

Chalcogen bonding in coordination chemistry

Coordination Chemistry Reviews, 2022
The chalcogen bond (ChB) is defined as a noncovalent interaction between the electron density deficient region (so-called as sigma or pi hole) of a covalently bonded chalcogen atom and a nucleophilic (Nu) site in the same (intramolecular) or another (intermolecular) molecular entity: R-Ch center dot center dot center dot Nu [Ch = O, S, Se or Te; R = C,
Kamran T. Mahmudov, Atash V. Gurbanov, Vusala A. Aliyeva, M. F??tima C. Guedes da Silva, Giuseppe Resnati, Armando J. L. Pombeiro   +5 more
openaire   +2 more sources

Imidazole-functionalized pyridinium-fused selenadiazolium salts as versatile chalcogen bond donors

Chemistry Journal of Moldova: General, Industrial and Ecological Chemistry
Novel imidazole-functionalized pyridinium-fused selenadiazolium salts were synthesised and structurally characterised as versatile chalcogen bond (ChB) donors.
Evghenii Duhnovskii, Namiq Shikhaliyev, Alexander Sapronov, Alexey Kubasov, Alexander Novikov, Alexander Tskhovrebov, Gulnaz Mirzayeva   +6 more
doaj   +1 more source