title: Rhombic cyclobutadiene with a boryl/amino-substitution pattern: boryl group migration induced by reaction with water.
abstract: The synthesis of a donor-acceptor cyclobutadiene featuring a boryl/amino-substitution pattern is presented together with its characteristic reactivity toward water. On the basis of the results of X-ray crystallography, theoretical studies, and spectroscopic analyses, the observed rhombic structure of the cyclobutadiene was attributed to a charge-separated electronic structure. Reaction of this boryl-substituted cyclobutadiene with water induced a characteristic migration of the boryl group, due to the Lewis acidity of the boryl-substituent.
authors.affiliation: Department of Applied Chemistry, Faculty of Science and Engineering, Chuo University , 1-13-27 Kasuga, Bunkyo-ku, Tokyo 192-0393, Japan.
authors.forename: Kaoru
authors.initials: K
authors.lastname: Onuma
authors.forename: Katsunori
authors.initials: K
authors.lastname: Suzuki
authors.forename: Makoto
authors.initials: M
authors.lastname: Yamashita