title: Photoswitching of the Lewis acidity of a catecholborane bearing an azo group based on the change in coordination number of boron.
abstract: Photoisomerization of a catecholborane bearing a 2-(phenylazo)phenyl group with an N-B dative bond caused photoswitching of the coordination number of boron between 3 and 4. The Lewis acidity of the catecholborane was switched by photoirradiation, and the complexation ability of the (E)- and the (Z)-isomers of the catecholborane with pyridine differs by more than a factor of 300. [reaction: see text]
authors.affiliation: Department of Chemistry, Graduate School of Science, The University of Tokyo, 7-3-1 Hongo, Bunkyo-ku, Tokyo 113-0033, Japan.
authors.forename: Naokazu
authors.initials: N
authors.lastname: Kano
authors.forename: Junro
authors.initials: J
authors.lastname: Yoshino
authors.forename: Takayuki
authors.initials: T
authors.lastname: Kawashima