Results 181 to 190 of about 1,488 (236)
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Chalcogen exchange in chalcogen–nitrogen π-heterocycles
Mendeleev Communications, 2021Abstract The procedures for synthesizing fused 1,2,5-chalcogenadi-azoles and 1,2,3-dithiazoles by direct exchange of one chalcogen atom for another, their scope and reaction pathways are discussed in this focus review.
Lidia S. Konstantinova, Oleg A. Rakitin
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Chalcogen-containing and Chalcogen-functionalized Heterocycles
2023Heterocycles containing chalcogens as heteroatoms or embedded in several different functional groups founded interesting applications in medicinal chemistry, coordination chemistry, and materials. Recent development on their preparation is reported here.
Filipe Penteado, Eduardo. E. Alberto
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Physical Review B, 1988
The chalcogens S, Se, and Te have been introduced by diffusion into single-crystal germanium. Both thermal- and optical-junction space-charge techniques have been performed in parallel with photoconductivity studies using a Fourier-transform spectrometer. Electronic levels within the energy gap have been monitored from both valence and conduction bands
, Grimmeiss, , Montelius, , Larsson
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The chalcogens S, Se, and Te have been introduced by diffusion into single-crystal germanium. Both thermal- and optical-junction space-charge techniques have been performed in parallel with photoconductivity studies using a Fourier-transform spectrometer. Electronic levels within the energy gap have been monitored from both valence and conduction bands
, Grimmeiss, , Montelius, , Larsson
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Nanotube Formation Favored by Chalcogen−Chalcogen Interactions
Journal of the American Chemical Society, 2002Close contacts between sulfur, selenium, and tellurium centers are used to construct nanotubes in the solid state which are able to host other molecules.
Daniel B, Werz +2 more
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Chalcogen Bonding: An Overview
Angewandte Chemie International Edition, 2018AbstractIn the last few decades, “unusual” noncovalent interactions like anion‐π and halogen bonding have emerged as interesting alternatives to the ubiquitous hydrogen bonding in many research areas. This is also true, to a somewhat lesser extent, for chalcogen bonding, the noncovalent interaction involving Lewis acidic chalcogen centers.
Lukas Vogel +2 more
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Theoretical study of the chalcogen—Carbon coupling constants in the chalcogen heterocyclopentadienes
Journal of Molecular Structure, 1982Abstract The three contributions (Fermi-contact, orbital-dipole, and spin-dipole) to the chalcogen-carbon coupling constants of selenophene, tellurophene and a number of their derivatives have been examined by SCF-INDO perturbation theory calculations.
V. Galasso +4 more
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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 +4 more
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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 +4 more
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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 +2 more
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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 +2 more
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Chalcogen⋅⋅⋅π Bonding Catalysis
Angewandte Chemie, 2021AbstractWhile the presence of sulfur⋅⋅⋅π bonding interaction is a general phenomenon in the biological systems, the exploitation of this noncovalent force in a chemical process yet remains elusive. Herein, we describe the concept of chalcogen⋅⋅⋅π bonding catalysis that activates molecules of π systems through the interaction between chalcogen and π ...
Xiangjin Kong, Pan‐Pan Zhou, Yao Wang
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The Reactivity of Germanium Phosphanides with Chalcogens
Inorganic Chemistry, 2017The reactivity of germanium phosphanido complexes with elemental chalcogens is reported. Addition of sulfur to [(BDI)GePCy2] (BDI = CH{(CH3)CN-2,6-iPr2C6H3}2) results in oxidation at germanium to form germanium(IV) sulfide [(BDI)Ge(S)PCy2] and oxidation at both germanium and phosphorus to form germanium(IV) sulfide dicylohexylphosphinodithioate complex
Lisa M. Harris +4 more
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