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Cyclic Dimethylsiloxanes as Pseudo Crown Ethers: Syntheses and Characterization of Li(Me 2 SiO) 5 [Al{OC(CF 3 ) 3 } 4 ], Li(Me 2 SiO) 6 [Al{OC(CF 3 ) 3 } 4 ], and Li(Me 2 SiO) 6 [Al{OC(CF 3 ) 2 Ph} 4 ]
Author(s) -
Decken Andreas,
Passmore Jack,
Wang Xinping
Publication year - 2006
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/anie.200504262
Subject(s) - alkali metal , characterization (materials science) , chemistry , crown (dentistry) , crystallography , ion , materials science , organic chemistry , nanotechnology , composite material
An unexpected guest : The salts LiD 5 [Al F ], LiD 6 [Al F ], and LiD 6 [Al PhF ] (D n =(Me 2 SiO) n ; [Al F ]=Al{OC(CF 3 ) 3 } 4 ; [Al PhF ]=Al{OC(CF 3 ) 2 Ph} 4 ) are the first host–guest complexes to be synthesized directly from cyclic dimethylsiloxanes, alkali‐metal ions, and weakly coordinating anions. Their experimental and calculated structures imply that the cyclic dimethylsiloxanes act as pseudo crown ethers (see structure of [LiD 6 ] + ).