An Ethylene‐Bridged Phosphane/Borane Frustrated Lewis Pair Featuring the ‐B(Fxyl)2 Lewis Acid Component. Issue 31 (29th June 2016) - Wang, Long
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) Mes2 PCH2 CH2 B(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(C6 F5 )2 reduction of carbon monoxide to the formyl stage to give the respective FLP(η 2 ‐formylborane) product. Most products were characterized by single‐crystal X‐ray crystal structure analysis. Abstract : New FLPs : The borane HB(Fxyl)2 adds to dimesitylvinylphosphane to give the ethylene‐bridged phosphane/borane frustrated Lewis pair (FLP), which undergoes a variety of typical FLP reactions under mild conditions (see figure).