Journal
ANGEWANDTE CHEMIE-INTERNATIONAL EDITION
Volume 54, Issue 44, Pages 13090-13094Publisher
WILEY-V C H VERLAG GMBH
DOI: 10.1002/anie.201506487
Keywords
alkali metals; boron; cation-pi interactions; lithium; sodium
Categories
Funding
- Deutsche Forschungsgemeinschaft [BR 1149/13-1]
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Cation-pi 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-pi 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-pi interactions.
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