Department of Chemistry, University of Calgary, Calgary, AB, T2N 1N4 (Canada), Fax: (+1)?403‐2898‐9488
Abstract:
Chalcogen‐transfer reagents? The bonding in the dicationic rings C2N2E2+ (see picture) differs from that in N‐heterocyclic carbenes and their isovalent p‐block analogues in accommodating a lone pair of electrons with π symmetry, as well as σ symmetry, on the chalcogen center. The labile electrophilic chalcogenium dications (E2+) are potentially versatile chalcogen‐transfer reagents in reactions with a variety of inorganic and organic substrates.
