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Synthesis and Characterization of the Dilithium Salt of the Octasilyl[4]radialene Dianion: Evidence for a Lithium Walk on the Eight‐Center, Ten‐Electron π‐Electron System
Author(s) -
Sekiguchi Akira,
Matsuo Tsukasa,
Sakurai Hideki
Publication year - 1998
Publication title -
angewandte chemie international edition
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 5.831
H-Index - 550
eISSN - 1521-3773
pISSN - 1433-7851
DOI - 10.1002/(sici)1521-3773(19980703)37:12<1661::aid-anie1661>3.0.co;2-o
Subject(s) - dilithium , lithium (medication) , toluene , ion , solvent , salt (chemistry) , chemistry , center (category theory) , electron , inorganic chemistry , crystallography , organic chemistry , physics , medicine , deprotonation , endocrinology , quantum mechanics
A highly symmetric structure is displayed in toluene by 1 , which was obtained by reduction of octasilyl[4]radialene with lithium in THF. The two Li + ions of 1 are not fixed to the π‐electron system in toluene, but are fluxional, giving rise to a bis‐contact ion pair. In a solvating medium such as THF, one of the Li + ions dissociates in such a way that 1 exists as a contact ion pair and a solvent‐separated ion pair.