Inorganic Chemistry Laboratory, Department of Chemistry, University of Oxford, Oxford, UK.
Chem Commun (Camb). 2011 Dec 7;47(45):12295-7. doi: 10.1039/c1cc15259a. Epub 2011 Oct 20.
Reaction of 2,6-dimesityl pyridine (L(py)) with BBr(3) leads to the spontaneous formation of the trigonal dibromoborenium cation L(py)·BBr(2)via bromide ejection. Systematic structural and computational studies, and the reactivity displayed by a closely related N-heterocyclic carbene (NHC) donor, reveal the role played by arene-borane interactions in this chemistry. L(py)·BBr(2) features a structurally characterized (albeit weak) electrostatic interaction between the borane Lewis acid and flanking arene π systems.
2,6-二甲基吡啶（L(py)）与 BBr(3)反应会自发形成三溴化硼阳离子[L(py)·BBr(2)]+，通过溴化物的排出。系统的结构和计算研究，以及与密切相关的 N-杂环卡宾（NHC）供体的反应性，揭示了芳烃-硼烷相互作用在这种化学中的作用。[L(py)·BBr(2)]+具有结构特征（尽管较弱）的路易斯酸硼烷和侧翼芳烃π体系之间的静电相互作用。
