Exclusive π Encapsulation of Light Alkali Metal Cations by a Neutral Molecule.

Exclusive π Encapsulation of Light Alkali Metal Cations by a Neutral Molecule.
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DOI:
10.1002/anie.201506487
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发表时间:
2015-10
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通讯作者:
R. Bertermann;H. Braunschweig;P. Constantinidis;Theresa Dellermann;Rian D. Dewhurst;W. Ewing;I. Fischer;T. Kramer;J. Mies;A. K. Phukan;A. Vargas
R. Bertermann;H. Braunschweig;P. Constantinidis;Theresa Dellermann;Rian D. Dewhurst;W. Ewing;I. Fischer;T. Kramer;J. Mies;A. K. Phukan;A. Vargas
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文献类型:
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作者:
R. Bertermann;H. Braunschweig;P. Constantinidis;Theresa Dellermann;Rian D. Dewhurst;W. Ewing;I. Fischer;T. Kramer;J. Mies;A. K. Phukan;A. Vargas

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阳离子-π相互作用是非共价键中最重要的一类,在生物学、化学和材料科学中都可以看到。然而,在几乎所有记录的案例中,这些相互作用只对更强的共价键或共轭键起辅助作用,因此,排他性阳离子-π键的例子非常罕见。在这项研究中,发现一种中性二硼炔分子在没有净电荷、共价键或孤对供体基团的情况下包裹了轻碱金属阳离子Li(+)和Na(+)。由此产生的包封复合物是,据我们所知,第一个结构上经过验证的物种,其中中性分子通过阳离子-π相互作用完全结合轻碱金属。
Cation-π interactions are one of the most important classes of noncovalent bonding, and are seen throughout biology, chemistry, and materials science. However, in almost every documented case, these interactions play only a supporting role to much stronger covalent or dative bonds, thus making examples of exclusive cation-π bonding exceedingly rare. In this study, a neutral diboryne molecule is found to encapsulate the light alkali metal cations Li(+) and Na(+) in the absence of a net charge, covalent bonds, or lone-pair donor groups. The resulting encapsulation complexes are, to our knowledge, the first structurally authenticated species in which a neutral molecule binds the light alkali metals exclusively through cation-π interactions.