Synthesis of Intramolecular P/Al-Based Frustrated Lewis Pairs via Aluminum-Tin-Exchange and their Reactivity toward CO₂.

ABSTRACT: Frustrated Lewis pairs (FLPs) composed of acidic alane and basic phosphane functions, separated by a xanthene linker, can be prepared through the corresponding Me₃ Sn derivative and methyl aluminum compounds with elimination of Me₄ Sn. This way MeClAl-, Cl₂ Al- and (C₆ F₅ )₂ Al- moieties could be introduced and the resulting FLPs are stabilized by a further equivalent of the alane precursors. In contact with the FLPs CO₂ is bound via the C atom at the phosphane functions and the two O atoms at the Al centers. The residues at the latter determine the binding strength. Hence, in case of MeClAl CO₂ capture occurs at higher pressure and under ambient conditions CO₂ is released again, while for Cl

SUBMITTER: Federmann P 

PROVIDER: S-EPMC9314872 | biostudies-literature | 2022 May

REPOSITORIES: biostudies-literature