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Abstract
Chalcogen bonding is a type of noncovalent interaction in which a covalently bonded chalcogen atom (O, S, Se or Te) acts as an electrophilic species towards a nucleophilic (negative) region(s) in another or in the same molecule. In general, this interaction is strengthened by the presence of an electron-withdrawing group on the electron-acceptor chalcogen atom and upon moving down in the periodic table of elements, from O to Te. Following a short discussion of the phenomenon of chalcogen bonding, this Perspective presents some demonstrative experimental observations in which this bonding is crucial for synthetic transformations, crystal engineering, catalysis and design of materials as synthons/tectons.
Highlights
Noncovalent interactions were firstly taken into consideration by van der Waals in 1873, helping to revise the equation of state for real gases.[1]
In some cases the crucial role of chalcogen bonds was not recognized by authors, but we spotlight them based on the reported interatomic contacts and the specific bond directionality
Data on the use of chalcogen bond donor molecules in catalysis still remain rather scarce,[71,72,93,94,95] we found some interesting examples, and one of them has been discussed in the Introduction section (Scheme 5),[72] while others follow below
Summary
Noncovalent interactions were firstly taken into consideration by van der Waals in 1873, helping to revise the equation of state for real gases.[1]. Her research activity da Silva follows a general streamline that usually starts with the design and synthesis of novel coordination compounds, evolving to their eventual application by exploring structure–properties (including reactivity)–function (application) relationships Her main research interests include: structural determination, by X-ray diffraction analysis, of metal complexes and organic compounds, metal polynuclear assemblies and supramolecular structures; activation, by transition metal centres, of small molecules with biological, pharmacological, environmental or industrial significance; metal mediated synthesis and catalysis; molecular electrochemistry and electrocatalysis; and mechanistic investigation of fast reactions mainly by the digital simulation of cyclic voltammetry. His research group investigates the activation of small molecules with industrial, environmental or biological significance, including metal-mediated synthesis and catalysis (e.g., functionalization of alkanes under mild conditions), crystal engineering of coordination compounds, design and self-assembly of polynuclear and supramolecular structures, molecular electrochemistry and theoretical studies He was the Chairman of the 25th ICOMC and member of organizing/ scientific committees of 40 international conferences or schools. In some cases the crucial role of chalcogen bonds was not recognized by authors, but we spotlight them based on the reported interatomic contacts (which should be less than the sum of the van der Waals radii) and the specific bond directionality
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