Structural Characterization of Lithium and Sodium Bulky Bis(silyl)amide Complexes.

ABSTRACT: Alkali metal amides are vital reagents in synthetic chemistry and the bis(silyl)amide {N(SiMe₃)₂} (N′′) is one of the most widely-utilized examples. Given that N′′ has provided landmark complexes, we have investigated synthetic routes to lithium and sodium bis(silyl)amides with increased steric bulk to analyse the effects of R-group substitution on structural features. To perform this study, the bulky bis(silyl)amines {HN(SitBuMe₂)(SiMe₃)}, {HN(SiiPr₃)(SiMe₃)}, {HN(SitBuMe₂)₂}, {HN(SiiPr₃)(SitBuMe₂)} and {HN(SiiPr₃)₂} (1) were prepared by literature procedures as colourless oils; on one occasion crystals of 1 were obtained. These were treated separately with nBuLi to afford the respective lithium bis(silyl)amides [Li{μ-N(SitBuMe₂)(SiMe₃)}]₂ (2), [Li{μ-N(SiiPr₃)(SiMe₃)}]₂ (3), [Li{N(SitBuMe

SUBMITTER: Nicholas HM 

PROVIDER: S-EPMC6100173 | biostudies-literature | 2018 May

REPOSITORIES: biostudies-literature