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Clamshell Opening in the Mixed‐Metal Supramolecular Aggregates Formed by Fourfold Reduced Corannulene for Maximizing Intercalated Metal Content
Author(s) -
Filatov Alexander S.,
Zabula Alexander V.,
Spisak Sarah N.,
Rogachev Andrey Yu.,
Petrukhina Marina A.
Publication year - 2014
Publication title -
angewandte chemie
Language(s) - English
Resource type - Journals
eISSN - 1521-3757
pISSN - 0044-8249
DOI - 10.1002/ange.201308090
Subject(s) - corannulene , supramolecular chemistry , chemistry , alkali metal , lithium (medication) , metal , crystallography , ring (chemistry) , benzene , nmr spectra database , inorganic chemistry , molecule , crystal structure , organic chemistry , spectral line , medicine , physics , astronomy , endocrinology
The first members of a new class of supramolecular organometallic compounds with mixed‐alkali‐metal cluster cores, LiK 5 and Li 3 K 3 , sandwiched between two four‐fold reduced corannulene decks are prepared and fully characterized. The triple‐decker supramolecular anions, [(C 20 H 10 4− )(LiK 5 ) 6+ (C 20 H 10 4− )] 2− and [(C 20 H 10 4− )(Li 3 K 3 ) 6+ (C 20 H 10 4− )] 2− , illustrate a record ability of bowl‐shaped and highly charged corannulene to provide all its sites, five benzene rings fused to a central five‐membered ring, for binding of six alkali‐metal ions. The previously unseen engagement of the hub‐site of C 20 H 10 4− in lithium binding is accompanied by unprecedented shifts up to −24 ppm in 7 Li NMR spectra. The discussion of product formation mechanism, augmented by calculations, is provided.