Journal
ANGEWANDTE CHEMIE-INTERNATIONAL EDITION
Volume 54, Issue 23, Pages 6926-6930Publisher
WILEY-V C H VERLAG GMBH
DOI: 10.1002/anie.201500892
Keywords
bicyclic compounds; NMR spectroscopy; phosphorus cations; phosphorus compounds; ring systems
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Funding
- Fonds der Chemischen Industrie
- Deutsche Forschungsgemeinschaft [SCHU 1170/11-1]
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The reaction of [ClP(-PMes*)](2) (1) with the Lewis acid GaCl3 yielded a hitherto unknown tetraphosphabicyclo[1.1.0]butan-2-ium salt, [Mes*P-4(Cl)Mes*][GaCl4] (3[GaCl4]), which incorporates a positively charged phosphonium center within its bicyclic P-4 scaffold. The formation of the title compound was studied by means of low-temperature NMR experiments. This led to the identification of an intermediate cyclotetraphosphenium cation, which was trapped by reaction with dimethylbutadiene (dmb). All of the compounds were fully characterized by experimental and computational methods.
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