Structural and ³¹P NMR solution studies on some cyclic triphosphenium ions and their 2‐arsa‐analogues

Abstract

Abstract Several new cyclic triphosphenium ions and their 2‐arsa‐analogues have been identified in solution by 31 P NMR spectroscopy. The crystal and molecular structures of the cations 1a,b , as their hexachlorostannate (IV) salts have shown that the five membered heterocyclic rings are planar, whereas the cation 9b as its diphosphanedioxide‐bis[pentachlorostannate(IV)] salt is nonplanar, like its saturated phosphorus counterpart. magnified image © 2001 John Wiley & Sons, Inc. Heteroatom Chem 12:501–510, 2001