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Synthesis of Lewis Acid‐Base Adducts Between Potassium Dihydrogenpnictogenides and Group 13 Lewis Acids

Year: 2024

Type: article

Abstract: Lewis acid‐base adducts between potassium dihydrogenpnictogenides [K(18c6)PnH 2 ] (Pn=P, As) and Trialkylgallanes (GaMe 3 , GaEt 3 , Ga t Bu 3 ) as well as BH 3 were synthesized. In the course of these investigations, we were able to fully characterize a row of compounds of the type [K(18c6)(thf) 0‐2 ][PnH 2 (ER 3 ) 2 ] (E=B: R=H; E=Ga: R=Me, Et, t Bu). Based on the successful syntheses of these species, we also synthesized several compounds of the composition [K(18c6)(thf) 0‐2 ][Pn(SiMe 3 ) 2 (ER 3 ) n ] (n=1, 2) starting from [KPn(SiMe 3 ) 2 ] (Pn=P and As) and ER 3 (E=B, Al, In: R=Me; E=Ga: R=Me, Et, t Bu). All isolated compounds, were examined by NMR spectroscopy, infra‐red spectroscopy and elemental analysis. A selection of the compounds presented were also examined by means of X‐ray structure analysis on the single crystal. The obtained adducts of negatively charged [PnH 2 ] − and [Pn(SiMe 3 ) 2 ] − fragments with Lewis acids are a class of compounds that has scarcely been investigated to date.

Source: Chemistry - A European Journal

DOI: 10.1002/chem.202404199