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)

• Record Type: Journal Article
• Authors: Chardon, Aurélien; Osi, Arnaud; Mahaut, Damien; Doan, Thu‐Hong; Tumanov, Nikolay; Wouters, Johan; Fusaro, Luca; Champagne, Benoît; Berionni, Guillaume
• Is Part Of: Angewandte Chemie international edition. Volume 59:Issue 30(2020)
• Page Start: 12226
• Page End: 12226
• Publication Date: 2020-06-22
• Subjects: Lewis adducts -- non-planar boron Lewis acids -- triarylborane -- triptycene; Chemistry -- Periodicals; 540
• DOI: 10.1002/anie.202007536
• Languages: English
• ISSNs: 1433-7851

Abstract

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.