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Keywords:

  • anions;
  • carbene analogues;
  • cations;
  • sulfur

Abstract

Thumbnail image of graphical abstract

DABling with sulfur: Sulfur(II) dications can be prepared using α-diimines to stabilize the positive charge (see scheme; DAB=diazabutadiene, Dipp=2,6-diisopropylphenyl, OTf=CF3SO3). The bonding is best described as that of a N,N-chelated sulfur(II) dication; these species represent the first sulfur-based structural mimics of N-heterocyclic silylene compounds and phosphenium cations.