Tuning the Lewis acidity of difluorido gold(iii) complexes: the synthesis of [AuClF2(SIMes)] and [AuF2(OTeF5)(SIMes)]
Mathias A. Ellwanger, Clara von Randow, Simon Steinhauer, Yunfei Zhou, Anja Wiesner, Helmut Beckers, Thomas Braun, Sebastian Riedel – 2018
The synthesis and structural characterisation of the difluorido organo gold(III) complexes [AuClF₂(SIMes)] and [AuF₂(OTeF₅)(SIMes)] are presented. The substitution of a fluorido ligand in [AuF₃(SIMes)] by an OTeF₅ group increases the Lewis acidity of the Au moiety. A scale for carbene affinities is presented, which correlates calculated and experimental values for the Lewis acidity of the metal centre in akin compounds.