(Me3Si)3Si(Me2Si)2(Me3Si)2SiLi (1) and LiSi(Me3Si)2(Me2Si)2Si(Me3Si)2Li (2) were synthesized by the reaction of (Me3Si)3Si(Me2Si)2Si(Me3Si)3 in THF with one or two mol‐equivalents, respectively, of MeLi. Both 1 and 2 were characterized spectroscopically and by trapping reactions, and 1 also by X‐ray crystallography.
The acidity of (Me 3 Si) 3 SiH was determined in diethyl ether solution by reactions of (Me 3 -Si) 3 SiLi‚3THF with a series of C-H acids. (Me 3 Si) 3 SiH and 9-phenylxanthyllithium (pK ) 28.7) form in diethyl ether solution an equilibrium mixture in which the [silane]/[silyl anion] ratio is 12:7, corresponding to a pK value for (Me 3 Si) 3 SiH of 29.4.
Radikale Entwicklungen in der Silyllithium‐Chemie: Die Herstellung und Kristallstruktur von 1, der ersten Verbindung mit geminalen Hg‐Si‐Li‐Bindungen, werden beschrieben; 1 erhält man bei Reaktion von (iPr3Si)2SiH2 mit [(tBu)2Hg] und anschließender Lithiierung in THF. Durch Bestrahlung von 1 lässt sich [Li(iPr3Si)2Si]. 2 erzeugen, das erste EPR‐spektroskopisch detektierte Silylradikal mit einer α‐Si‐Li‐Bindung.
scite is a Brooklyn-based organization that helps researchers better discover and understand research articles through Smart Citations–citations that display the context of the citation and describe whether the article provides supporting or contrasting evidence. scite is used by students and researchers from around the world and is funded in part by the National Science Foundation and the National Institute on Drug Abuse of the National Institutes of Health.