An Ethylene‐Bridged Phosphane/Borane Frustrated Lewis Pair Featuring the ‐B(Fxyl)2 Lewis Acid Component |
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| Authors: | Dr. Long Wang Kamil Samigullin Prof. Dr. Matthias Wagner Dr. Alison C. McQuilken Prof. Dr. Timothy H. Warren Dr. Constantin G. Daniliuc Dr. Gerald Kehr Prof. Dr. Gerhard Erker |
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| Affiliation: | 1. Organisch-Chemisches Institut, Universit?t Münster, Münster, Germany;2. Institut für Anorganische und Analytische Chemie, Goethe-Universit?t Frankfurt, Frankfurt (Main), Germany;3. Department of Chemistry, Georgetown University, Washington DC, USA |
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| Abstract: | Hydroboration of dimesitylvinylphosphane with bis[3,5‐bis(trifluoromethyl)phenyl]borane [HB(Fxyl)2] gave the intramolecular ethylene‐bridged P/B frustrated Lewis pair (FLP) Mes2PCH2CH2B(Fxyl)2. The new compound underwent a variety of typical FLP reactions such as P/B‐addition to the carbonyl group of p‐chloro‐benzaldehyde. Cooperative N,N‐addition to nitric oxide gave the respective persistent P/B FLPNO. radical, which readily reacted with 1,4‐cyclohexadiene by H‐atom abstraction to yield the corresponding P/B FLPNOH product. The B(Fxyl)2‐containing FLP reacted as a template for the HB(C6F5)2 reduction of carbon monoxide to the formyl stage to give the respective FLP(η2‐formylborane) product. Most products were characterized by single‐crystal X‐ray crystal structure analysis. |
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| Keywords: | boranes frustrated Lewis pair phosphorus small molecule binding |
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