## Abstract Several cyclic triphosphenium ions of various ring sizes have been successfully protonated to form the corresponding triphosphane di‐ium dications, either by a ^t^BuCl/AlCl~3~ mixture and/or by triflic acid. The latter reagent appears to be harsher, however, sometimes leading to decompo
Methylation of some cyclic triphosphenium ions
✍ Scribed by Keith B. Dillon; Richard J. Olivey
- Publisher
- John Wiley and Sons
- Year
- 2004
- Tongue
- English
- Weight
- 88 KB
- Volume
- 15
- Category
- Article
- ISSN
- 1042-7163
- DOI
- 10.1002/hc.10228
No coin nor oath required. For personal study only.
✦ Synopsis
Abstract
Six cyclic triphosphenium ions, including examples of five‐, six‐, and seven‐membered ring systems, have been successfully methylated by excess methyl triflate to form the corresponding dications. This has been unequivocally established by means of ^31^P NMR spectroscopy; results are in good agreement with literature data for this type of compound. © 2004 Wiley Periodicals, Inc. Heteroatom Chem 15:150–154, 2004; Published online in Wiley InterScience (www.interscience.wiley.com). DOI 10.1002/hc.10228
📜 SIMILAR VOLUMES
## Abstract The first four‐membered ring cyclic triphosphenium ions with carbon substituents (methyl or cyclohexyl) on the outer phosphorus atoms have been identified in solution by ^31^P NMR spectroscopy. The cyclohexyl derivative in the presence of [SnCl~6~]^2−^ as counterion was stable enough fo
## 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 pla
The preparation in solution of a number of cyclic triphosphenium ions and their identification by 31 P NMR spectroscopy are described; the crystal and molecular structure of the six-membered cationic ring (as its hexachlorostannate) has been determined.
## 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