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Media type:
E-Article
Title:
Von lithiierten Aminofluorsilanen zu mono- und dimeren Iminosilanen / From Lithiated Aminofluorosilanes to Mono- and Dimeric Iminosilanes
Contributor:
Stalke, Dietmar;
Keweloh, Nayla;
Klingebiel, Uwe;
Noltemeyer, Matthias;
Sheldrick, George M.
Published:
Walter de Gruyter GmbH, 1987
Published in:
Zeitschrift für Naturforschung B, 42 (1987) 10, Seite 1237-1244
Language:
English
DOI:
10.1515/znb-1987-1005
ISSN:
1865-7117;
0932-0776
Origination:
Footnote:
Description:
Abstract Depending on the solvent and the bulkiness of the substituents, Iithiated aminofluorosilanes are dimers, monomers, or LiF-adducts of iminosilanes. In the crystal structure of the dimeric lithium derivative of di-tert-butyl(rm-butylamino)fluorosilane, each lithium atom is coordinated by one fluorine and two nitrogen atoms. LiF-elimination leads - if sterically possible - to dimerisation. The limits of dimerisation are reached with the dimer diisopropyl(tri-tert-butylphenyI- imino)silane, for which the crystal structure analysis shows severe steric distortions. Fluorine- chlorine-cxchange occurs in reactions of lithiated (tri-tert-butylphenylimino)fluorosilanes with Me3SiCl. Iminosilanes are obtained by thermal LiCl-elimination from the resulting salts.