A Phosphanyl‐Phosphagallene that Functions as a Frustrated Lewis Pair. Issue 47 (9th September 2020)

• Record Type: Journal Article
• Authors: Wilson, Daniel W. N.; Feld, Joey; Goicoechea, Jose M.
• Is Part Of: Angewandte Chemie international edition. Volume 59:Issue 47(2020)
• Page Start: 20914
• Page End: 20918
• Publication Date: 2020-09-09
• Subjects: decarbonylation -- gallium -- frustrated Lewis pairs -- phosphaketenes -- phosphorus; Chemistry -- Periodicals; 540
• DOI: 10.1002/anie.202008207
• Languages: English
• ISSNs: 1433-7851

Abstract

Abstract: Phosphagallenes (1 a /1 b ) featuring double bonds between phosphorus and gallium were synthesized by reaction of (phosphanyl)phosphaketenes with the gallium carbenoid Ga(Nacnac) (Nacnac=HC[C(Me)N(2, 6‐ i ‐Pr2 C6 H3 )]2 ). The stability of these species is dependent on the saturation of the phosphanyl moiety. 1 a, which bears an unsaturated phosphanyl ring, rearranges in solution to yield a spirocyclic compound (2 ) which contains a P=P bond. The saturated variant 1 b is stable even at elevated temperatures. 1 b behaves as a frustrated Lewis pair capable of activation of H2 and forms a 1:1 adduct with CO2 . Abstract : We describe the synthesis of compounds exhibiting gallium–phosphorus double bonds. The stability of these species is dependent on the saturation of the phosphanyl moiety, and the saturated variant behaves as a frustrated Lewis pair that is capable of activating H2 and forms a 1:1 adduct with CO2 .