Results 191 to 200 of about 5,131 (236)

Chalcogen bonding catalysis

Chemical Society Reviews
This tutorial review will focus on the recently evolved chalcogen bonding catalysis. Emphasis will be given to the basics of non-covalent bonding, chiral chalcogen bonding catalysis, chiral separation, and chalcogen bonding in biomolecules.
Govindasamy Sekar, Vysakh Venugopalan Nair, Jieping Zhu   +2 more
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From Noncovalent Chalcogen–Chalcogen Interactions to Supramolecular Aggregates: Experiments and Calculations

Chemical Reviews, 2018
This review considers noncovalent bonds between divalent chalcogen centers. In the first part we present X-ray data taken from the solid state structures of dimethyl- and diphenyl-dichalcogenides as well as oligoalkynes kept by alkyl-sulfur, -selenium, and -tellurium groups.
Rolf Gleiter, Gebhard Haberhauer, Daniel B. Werz, Frank Rominger, Christian Bleiholder   +4 more
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A World Beyond Hydrogen Bonds?—Chalcogen–Chalcogen Interactions Yielding Tubular Structures

Chemistry – A European Journal, 2003
AbstractIt is shown that tubular structures arise in the solid state through close chalcogen–chalcogen (X⋅⋅⋅X) contacts. As examples a variety of cyclic systems containing sulfur and selenium centers is presented. Common to all of them are close contacts between the chalcogen centers of neighboring stacks giving rise to a zigzag or ladder‐type ...
Rolf, Gleiter, Daniel B, Werz, Bernhard J, Rausch   +2 more
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Chalcogen-Centered Radicals

Sulfur reports, 1995
Abstract The main types of radicals formed in initiated reactions of organic compounds of selenium and tellurium, detection methods, and their physico-chemical properties and reactivity are presented in this review.
E. N. Deryagina, M. G. Voronkov
openaire   +1 more source

Chalcogen-based Probes

2023
Recently, selenium and tellurium atoms have been incorporated in various fluorophores such as rhodamine, cyanine, fluorescein, BODIPY, coumarin, and BOPHY for the detection and quantification of different analytes of biochemical and environmental interest by fluorescence measurements.
Gauri S. Malankar, Beatriz S. Cugnasca, Felipe Wodtke, João L. Petrarca de Albuquerque, Pratiksha P. Deshmukh, Divyesh S. Shelar, Alcindo A. Dos Santos, Sudesh T. Manjare   +7 more
openaire   +1 more source

Carbon–chalcogen wires: alkynyltellurolatocarbynes

Chemical Communications
The reactions of [W(CBr)(CO)2(Tp*)] with LiTeCCR (R = SiMe3, SiiPr3, iPr, nBu, tBu, Ph, C6H4Me-4, methylimidazol-2-yl) afford the first alkynyltellurolatocarbynes [W(CTeCCR)(CO)2(Tp*)] feauring an unsaturated carbon–tellurium spine.
Chee S. Onn, Anthony F. Hill
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Electrochemical Fluoro-Chalcogenation

Phosphorus, Sulfur, and Silicon and the Related Elements, 1997
Electrochemical fluoro-chalcogenation (S, Se) of alkenes and alkynes, and recycle use of in situ generated PhSeF for allylic fluorination are discussed.
Kenji Uneyama, Hidekl Asai, Yasufumi Dan-oh, Hiroshi Funatsuki   +3 more
openaire   +1 more source

Chalcogen-Based Organocatalysis

2011
Most current organocatalysts are based on nitrogen (or phosphorus) as reactive atom, including also most processes depending on proton acidity and/or Lewis basicity. Only few organocatalytic systems use organochalcogens, although such reactions are of great importance in nature, especially evident in hydrolases with serine or cysteine as catalytic ...
Ludger A. Wessjohann, Martin C. Nin Brauer, Kristin Brand   +2 more
openaire   +1 more source

Iron‐Catalyzed One‐Step Synthesis of Isothiazolone/1,2‐Selenazolone Derivatives via [3+1+1] Annulation of Cyclopropenones, Anilines, and Elemental Chalcogens

Advanced Synthesis and Catalysis, 2022
Rulong Yan
exaly  

Elemental chalcogens acting as metal-free electrocatalysts for effective alkaline and acidic hydrogen evolution reaction

Catalysis Today, 2023
Carsten Walter, Rodrigo Beltrán-Suito, Navneet K Gupta   +2 more
exaly