Inside Cover: Controlled Generation of 9‐Boratriptycene by Lewis Adduct Dissociation: Accessing a Non‐Planar Triarylborane (Angew. Chem. Int. Ed. 30/2020). Issue 30 (22nd June 2020) - Chardon, Aurélien
Abstract : Escaping from the planar geometry of trivalent boron Lewis acids is enabled by incorporating a boron atom at the edge of the triptycene scaffold. In their Communication on page 12402, G. Berionni and co‐workers describe the preparation of the elusive 9‐boratriptycene, a triarylborane with unprecedented structure and high Lewis acidity, due to the very low reorganization energy of the triptycene core and the absence of conjugation of its B atom orbitals with the orthogonally oriented aryl rings.