Lewis acid-base adducts between potassium dihydrogenpnictogenides [K(18c6)PnH] (Pn=P, As) and Trialkylgallanes (GaMe, GaEt, GatBu) as well as BH were synthesized. In the course of these investigations, we were able to fully characterize a row of compounds of the type [K(18c6)(thf)][PnH(ER)] (E=B: R=H; E=Ga: R=Me, Et, tBu). Based on the successful syntheses of these species, we also synthesized several compounds of the composition [K(18c6)(thf)][Pn(SiMe)(ER)] (n=1, 2) starting from [KPn(SiMe)] (Pn=P and As) and ER (E=B, Al, In: R=Me; E=Ga: R=Me, Et, tBu). 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] and [Pn(SiMe)] fragments with Lewis acids are a class of compounds that has scarcely been investigated to date.
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