title: A pentacoordinate boron-containing π-electron system with Cl-B-Cl three-center four-electron bonds.
abstract: Tricoordinate boron-containing π-electron systems are an attractive class of compounds with intense fluorescence and strong electron-accepting properties. However, the impact of pentacoordination of the boron atoms on their properties has not been determined. We now disclose a B,B'-bis(1,8-dichloro-9-anthryl)-substituted 9,10-dihydro-9,10-diboraanthracene as a new pentacoordinate organoboron compound. In this skeleton, with the aid of the orthogonal arrangement of the anthryl substituent, the B and Cl atoms can form a three-center four-electron (3c-4e) Cl-B-Cl bond. The pentacoordination of the boron atom significantly perturbs the electronic structure and thereby the photophysical and electrochemical properties.
authors.affiliation: Institute of Transformative Bio-Molecules (WPI-ITbM), Department of Chemistry, Graduate School of Science, Nagoya University, Furo, Chikusa, Nagoya 464-8602, Japan.
authors.forename: Chuandong
authors.initials: C
authors.lastname: Dou
authors.forename: Shohei
authors.initials: S
authors.lastname: Saito
authors.forename: Shigehiro
authors.initials: S
authors.lastname: Yamaguchi
mesh_terms: D001895:Boron / Q000737:chemistry*; D001896:Boron Compounds / Q000737:chemistry*; D002712:Chlorides / Q000737:chemistry*; D004583:Electrons; D008958:Models, Molecular; D015394:Molecular Structure; D011789:Quantum Theory
chemical_list: D001896:Boron Compounds; D002712:Chlorides; D001895:Boron