TY - JOUR
T1 - Establishing the Role of Triflate Anions in H2 Activation by a Cationic Triorganotin(IV) Lewis Acid
AU - Sapsford, Joshua
AU - Csókás, Dániel
AU - Scott, Daniel
AU - Turnell-Ritson, Roland
AU - Piascik, Adam
AU - Pápai, Imre
AU - Ashley, Andrew
PY - 2020/7/17
Y1 - 2020/7/17
N2 - 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.
AB - 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.
UR - https://www.scopus.com/pages/publications/85089474434
U2 - 10.1021/acscatal.0c02023
DO - 10.1021/acscatal.0c02023
M3 - Article
SN - 2155-5435
VL - 10
SP - 7573
EP - 7583
JO - ACS Catalysis
JF - ACS Catalysis
IS - 14
ER -