Electrophilic chemistry of the cubic arsaalkyne tetramer (AsCtBu)4: Arsonium ions of ethylation (EtOTf), benzylation (PhCH2OTf), and mono- and diprotonation (FSO3H/SO2)
✍ Scribed by Kenneth K. Laali; John F. Nixon; Julian A. Johnson
- Book ID
- 102228872
- Publisher
- John Wiley and Sons
- Year
- 1994
- Tongue
- English
- Weight
- 339 KB
- Volume
- 5
- Category
- Article
- ISSN
- 1042-7163
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✦ Synopsis
The cubic arsaalk>we tetramer 2 reacts at room temperature with ethyl triflate to give the As-ethylated arsonium salt 4. A similar reaction of 2 with benzyl triflate (generated in situ via PhCHzCl/AgOTf) gives the As-benzylated salt 5. Low-temperature protonation of 2 with FSO2H/SO2 produces a mixture of arsonium ions 6 and 7 resulting from mono-and diprotonation. The NMR characteristics of the resulting arsonium ions are discussed and compared with those of the corresponding phosphonium ions derived from the tetraphosphacubane 3. The F A B mass spectrum of 2 and its decomposition products (FAB-CAD-MSI M S ) are also discu.ssed.