1,2-氮杂硼烷的超亲电性：氙气和一氧化碳加合物的形成。
Superelectrophilicity of 1,2-Azaborine: Formation of Xenon and Carbon Monoxide Adducts.
机构信息
Institut für Organische Chemie, Universität Tübingen, Auf der Morgenstelle 18, 72076, Tübingen, Germany.
Department of Chemistry, Boston College, Chestnut Hill, Massachusetts, 02467-3860, USA.
出版信息
Angew Chem Int Ed Engl. 2019 Mar 18;58(12):4061-4064. doi: 10.1002/anie.201813503. Epub 2019 Feb 20.
Abstract
The BN analogue of ortho-benzyne, 1,2-azaborine, is shown to bind carbon monoxide and a xenon atom under matrix isolation conditions, demonstrating its strongly Lewis acidic superelectrophilic nature. The Lewis acid-base complexes involving CO and Xe can be cleaved photochemically and reformed by mildly annealing the matrices. The interaction energy of 1,2-azaborine with Xe is 3 kcal mol according to quantum chemical computations, and is similar to that of the superelectrophilic carbene difluorovinylidene.
摘要
硼氮类似物邻苯炔，1,2-氮杂硼烷，在基质隔离条件下被证明能与一氧化碳和氙原子结合，这表明它具有强烈的路易斯酸性超亲电性。涉及 CO 和 Xe 的路易斯酸碱配合物可以通过光化学裂解，并通过温和地退火基质重新形成。根据量子化学计算，1,2-氮杂硼烷与 Xe 的相互作用能为 3 kcal mol，与超亲电碳烯二氟乙烯基类似。
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