Crystal Structures of the Chiral Lithiosilanes [(Li<i>s</i>)-PhMe<sub>2</sub>SiLi·THF·(−)-Sparteine] and [Ph<sub>2</sub>(NEt<sub>2</sub>)SiLi·(−)-Sparteine]
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The (−)-sparteine-coordinated lithiosilanes (Lis)-4 and 5 crystallize as monomers with coordination numbers of 4 and 3 on lithium and represent the first structurally characterized enantiopure lithiosilanes. Both systems are also monomeric in solution with Si−Li contacts detected by 29Si−7Li couplings in the 29Si NMR spectrum (for 5 even at room temperature).
创建时间：
2006-01-25
