Differences in the Reactivity of Geminal Si-O-P and Al-O-P Frustrated Lewis Pairs.

ABSTRACT: The new oxygen-bridged geminal Si/P Frustrated Lewis Pair (FLP) tBu₂ P-O-Si(C₂ F₅ )₃ (2) is able to reversibly bind carbon dioxide at ambient temperature. We compared its reactivity towards benzil, but-3-en-2-one, nitriles and phenylacetylene to that of the Al/P FLP tBu₂ P-O-AlBis₂ (Bis=-CH(SiMe₃ )₂ ) (1). When reacted with benzil, both, 1 and 2, form the 1,2-addition product, but in the Si/P FLP 2, the second carbonyl function additionally binds to the silicon atom. With but-3-en-2-one 2 forms the 1,2-addition product, while 1 binds in 1,4-position. The reaction with acetonitrile yielded an unexpected etheneimine adduct for both systems, while only 1 reacted with tert-butylnitrile. With benzonitrile an

SUBMITTER: Wickemeyer L 

PROVIDER: S-EPMC10107522 | biostudies-literature | 2023 Feb

REPOSITORIES: biostudies-literature