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Keywords:

  • antimony;
  • cations;
  • coordination modes;
  • phosphorus;
  • solid-state structures
Thumbnail image of graphical abstract

Square deal: Reactions of SbF3 with Me3SiOSO2CF3 produce Sb3+ and [Sb-F]2+ cations, which form complexes with two or three Me3P ligands. Subsequent reductive elimination of diphosphonium or fluorophosphonium cations from the complexes give the folded square cyclo-[(Me3P)4Sb4][OTf]4. Formation of the tetracation framework reveals new redox chemistry for Sb.