Results 1 to 10 of about 3,102 (142)
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.
Stefan M Huber, Elric Engelage
exaly +6 more sources
Selection of isomerization pathways of multistep photoswitches by chalcogen bonding [PDF]
Nature Communications, 2023 Multistep photoswitches are able to engage in different photoisomerization pathways and are challenging to control. Here we demonstrate a multistep sequence of E/Z isomerization and photocyclization/cycloreversion of photoswitches via manipulating the ...
Shuaipeng Jia +4 more
doaj +2 more sources
Halogen bonding and chalcogen bonding mediated sensing. [PDF]
Chem Sci, 2022 Sigma–hole mediated detection of anions is rapidly emerging as a new paradigm in supramolecular sensor chemistry. Herein, we provide an overview of this field including halogen bonding and chalcogen bonding optical, electrochemical and other sensors.
Hein R, Beer PD.
europepmc +3 more sources
Chalcogen‐Bonding Catalysis with Telluronium Cations [PDF]
Angewandte Chemie - International Edition, 2021 AbstractChalcogen bonding results from non‐covalent interactions occurring between electrodeficient chalcogen atoms and Lewis bases. Among the chalcogens, tellurium is the strongest Lewis acid, but Te‐based compounds are scarcely used as organocatalysts.
Emmanuel Aubert +2 more
exaly +4 more sources
Activating Chalcogen Bonding (ChB) in Alkylseleno/Alkyltelluroacetylenes toward Chalcogen Bonding Directionality Control [PDF]
Angewandte Chemie - International Edition, 2020 AbstractActivation of a deep electron‐deficient area on chalcogen atoms (Ch=Se, Te) is demonstrated in alkynyl chalcogen derivatives, in the prolongation of the (C≡)C−Ch bond. The solid‐state structures of 1,4‐bis(methylselenoethynyl)perfluorobenzene (1Se) show the formation of recurrent chalcogen‐bonded (ChB) motifs.
Ie-Rang Jeon +2 more
exaly +3 more sources
Cooperative chalcogen bonding interactions in confined sites activate aziridines [PDF]
Nature Communications, 2022 The activation of aziridines is typically achieved via reaction with strong Lewis acids or transition metals. Here, the authors report that cooperative Se ∙ ∙∙O and Se ∙ ∙∙N noncovalent interactions can activate sulfonyl-protected aziridines, which ...
Haofu Zhu, Pan-Pan Zhou, Yao Wang
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Supramolecular catalysis with ethers enabled by dual chalcogen bonding activation [PDF]
Nature Communications, 2023 The activation of ethers by weak interactions is a long-standing objective in supramolecular catalysis, but yet it remains an underdeveloped topic. The obstacles towards solving this problem are prominent since it is difficult for a weak interaction to ...
Zhiguo Zhao +4 more
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Does Oxygen Feature Chalcogen Bonding? [PDF]
Molecules, 2019 Using the second-order Møller−Plesset perturbation theory (MP2), together with Dunning’s all-electron correlation consistent basis set aug-cc-pVTZ, we show that the covalently bound oxygen atom present in a series of 21 prototypical ...
Pradeep R. Varadwaj
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Methyl Scanning for Mechanochemical Chalcogen‐Bonding Cascade Switches [PDF]
ChemistryOpen, 2020 Chalcogen‐bonding cascade switching was introduced recently to produce the chemistry tools needed to image physical forces in biological systems. In the original flipper probe, one methyl group appeared to possibly interfere with the cascade switch.
Dr. Xiang Zhang +2 more
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Chalcogen bonding in the solid-state structures of 1,3-bis(benzimidazoliumyl)benzene-based chalcogen-bonding donors. [PDF]
Acta Crystallogr C Struct Chem, 2023 1,3-Bis(benzimidazoliumyl)benzene-based chalcogen-bonding catalysts were previously successfully applied in different benchmark reactions. In one of those examples, i.e. the activation of quinolines, sulfur- and selenium-based chalcogen-bonding catalysts showed comparable properties, which is unexpected, as the selenium-containing catalysts should show
Steinke T, Engelage E, Huber SM.
europepmc +3 more sources