Reaction of a cyclic triphosphenium ion with triflic acid and SnX2 (X = Br or Cl): A 31P NMR study
✍ Scribed by Alice J. Boyall; Keith B. Dillon; Philippa K. Monks; Jennifer C. Potts
- Publisher
- John Wiley and Sons
- Year
- 2007
- Tongue
- English
- Weight
- 178 KB
- Volume
- 18
- Category
- Article
- ISSN
- 1042-7163
- DOI
- 10.1002/hc.20302
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✦ Synopsis
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 yield a dication with a PH~2~ primary phosphane terminal group, which is comparatively stable. The structure of this species has been unequivocally confirmed by ^31^P solution‐state NMR spectroscopy. © 2007 Wiley Periodicals, Inc. Heteroatom Chem 18:609–612, 2007; Published online in Wiley InterScience (www.interscience.wiley.com). DOI 10.1002/hc.20302