Abstract

This cover picture shows a Lewis adduct between a pyramidal boron Lewis superacid and a bulky pyridine. Due to the high Lewis acidity and pyramidalization at the boron atom, the boron-nitrogen bond is shorter than that in other Lewis adducts. This induces large steric repulsions resulting in the deformation of the collidine Lewis base. This fundamental observation illustrating the importance of the structural reorganization of Lewis bases in a process of association with a bulky Lewis acid is relevant to the field of frustrated Lewis pairs chemistry (DOI: 10.1002/zaac.202300009).

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