Establishing the Role of Triflate Anions in H2 Activation by a Cationic Triorganotin(IV) Lewis Acid

Joshua Sapsford, Dániel Csókás, Daniel Scott, Roland Turnell-Ritson, Adam Piascik, Imre Pápai, Andrew Ashley

Research output: Contribution to journalArticlepeer-review

10 Citations (SciVal)

Abstract

Cationic Lewis acids (LAs) are gaining interest as targets for frustrated Lewis pair (FLP)-mediated catalysis. Unlike neutral boranes, which are the most prevalent LAs for FLP hydrogenations, the Lewis acidity of cations can be tuned through modulation of the counteranion; however, detailed studies on such anion effects are currently lacking in the literature. Herein, we present experimental and computational studies which probe the mechanism of H2 activation using iPr3SnOTf (1-OTf) in conjunction with a coordinating (quinuclidine; qui) and noncoordinating (2,4,6-collidine; col) base and compare its reactivity with {iPr3Sn·base}{Al[OC(CF3)3]4} (base = qui/col) systems which lack a coordinating anion to investigate the active species responsible for H2 activation and hence resolve any mechanistic roles for OTf in the iPr3SnOTf-mediated pathway.
Original languageEnglish
Pages (from-to)7573–7583
JournalACS Catalysis
Volume10
Issue number14
Early online date8 Jun 2020
DOIs
Publication statusPublished - 17 Jul 2020

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