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Published on: March 27, 2018
Ambient Temperature Isolation of a Monatomic Boron(0) Complex
William Kennedy1, Vignesh Pattathil1, YuXiang Wei1
1Department of Chemistry, Charles E. Fipke Centre for Innovative Research, University of British Columbia, Okanagan Campus, 3247 University Way, Kelowna, BC V1V 1V7, Canada.
Abstract:
The first bottleable example of a neutral Group 13 atom bound only by neutral donor ligands (L) has been fully characterized by spectroscopic methods and its structure determined by a single-crystal X-ray diffraction study. A two-coordinate paramagnetic L2B0 complex can readily be accessed through a facile reduction reaction and is stabilized by π-accepting cyclic (alkyl)(amino)carbene (CAAC) ligands. Further reduction of (CAAC)2B leads to the isolation of a stable diamagnetic boride anion. In turn, oxidation leads to the putative formation of a transient two-coordinate cationic borylene, which has been trapped to form a stable boron(I) complex. Density functional theory calculations support the formulation of (CAAC)2B as a boron(0) complex stabilized by strong multiple bonding.
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