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Formation of Sulfur−Sulfur Bonds in Copper Complexes

✍ Scribed by Gabriel Aullón; Santiago Alvarez

Publisher
John Wiley and Sons
Year
2004
Tongue
English
Weight
242 KB
Volume
2004
Category
Article
ISSN
1434-1948

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✦ Synopsis

Abstract

The recently reported dinuclear complexes [Cu~2~(μ‐S~2~)(diketiminato)~2~] that have short S−S distances across their Cu~2~S~2~ rings are theoretically studied with the help of density functional calculations and a topological analysis of the electron density. The possibility of obtaining the isomeric form without a S−S bond is explored by comparing the structure and bonding with its oxo analogue. A study of the influence of several terminal‐chelating ligands on the relative stability of the sulfido‐ and the disulfido‐bridged forms is also presented. The only way to stabilize a sulfido‐bridged isomer is found to be via two‐electron reduction, whereas chemical substitutions are not able to produce the cleavage of the S−S bond. (© Wiley‐VCH Verlag GmbH & Co. KGaA, 69451 Weinheim, Germany, 2004)

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## Abstract Copper‐catalyzed formation of sulfur–nitrogen bonds can be performed by a dehydrocoupling of aryl thiols with amines. Sulfenamides or sulfonamides can be produced by the use of a copper catalyst in air or under oxygen atmosphere. Furthermore, a reaction involving the combination of a pa