A Base-Stabilized Terminal Borylene Complex of Osmium Derived from Reaction between a Dichloroboryl Complex and 8-Aminoquinoline

Abstract

Displacement of both chloro groups from the dichloroboryl ligand of 1 by reaction with 8-aminoquinoline gives the internally base-stabilized terminal borylene complex 2. The electrophilic boron center in this complex is attacked by ethanol to form the ethoxyboryl complex [█Os{B(OEt)NHC9H6█N}Cl(CO)(PPh3)2] in which the quinoline N atom is tethered to the coordinated Os center.