title: Planarized triarylboranes: stabilization by structural constraint and their plane-to-bowl conversion.
abstract: Triphenylborane and 9,10-diphenyl-9,10-dihydro-9,10-diboraanthracene, constrained to a planar arrangement with methylene tethers, were synthesized by intramolecular multi-fold Friedel-Crafts cyclization. These compounds were stable toward air, water, and amines, despite the absence of steric protection in the vertical direction with respect to the B atoms, and showed characteristic structural, electronic, and photophysical properties. In addition, upon treatment with a fluoride ion, these compounds underwent a plane-to-bowl conversion in a controlled manner.
authors.affiliation: Department of Chemistry, Graduate School of Science,  Nagoya University  and JST-CREST, Furo, Chikusa, Nagoya 464-8602, Japan.
authors.forename: Zhiguo
authors.initials: Z
authors.lastname: Zhou
authors.forename: Atsushi
authors.initials: A
authors.lastname: Wakamiya
authors.forename: Tomokatsu
authors.initials: T
authors.lastname: Kushida
authors.forename: Shigehiro
authors.initials: S
authors.lastname: Yamaguchi