Lithium Complexes of Asymmetric Hydrogen Tetraimido Sulfate

Abstract

Two novel monolithiated complexes, [(thf)2Li(NtBu)2(NHtBu)S(Ndipp)] (3) and [(thf)2Li(NtBu)2(NHtBu)S(Ndmp)] (4), are presented from the reaction of the neutral tri(tert-butyl)sulfur triimide S(NtBu)3 (1), nBuLi, and diisopropylaniline and dimethylaniline, respectively. These asymmetrically substituted hydrogen tetraimido sulfate complexes of lithium provide the opportunity to switch the metal in a transmetalation reaction and to introduce another substituent at the protonated imide function.