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

✍ Scribed by Rachel J. Barnham; Robert M. K. Deng; Keith B. Dillon; Andrés E. Goeta; Judith A. K. Howard; Horst Puschmann

Publisher: John Wiley and Sons
Year: 2001
Tongue: English
Weight: 356 KB
Volume: 12
Category: Article
ISSN: 1042-7163
DOI: 10.1002/hc.1077

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✦ Synopsis

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

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✍ Alice J. Boyall; Keith B. Dillon; Philippa K. Monks; Jennifer C. Potts 📂 Article 📅 2007 🏛 John Wiley and Sons 🌐 English ⚖ 178 KB

## Abstract The di‐ium dication formed by triflic acid protonation of the cyclic triphosphenium ion derived from 1,4‐bis‐diphenylphosphinobutane, (dppb), and P~3~(X = Br or Cl) decomposes via an acyclic dication bearing a PHX group; this intermediate is reduced by SnX~2~ in the presence of HX to y