Abstract

Tetrameric Lithium Tris(N, N-dimethylamino)silylamide: Synthesis, Structure, and Reactivity [(Me2N)3SiNHLi]4 (1) has been prepared from <(Me2N)3Si—NH2 and t-BuLi. According to the crystal structure analysis 1 has a laddering structure consisting of seven four-membered rings. The two Li2(NH)2 units contain three-coordinated Li; the other five rings consist of Li(NH)2Si units in which the Li atoms are found to be four-coordinated. Reaction with bis(4-tolyl)-oxalic imidoyl chloride results in the formation of bis(N, N′-dimethylamino)-bis(4-tolyl)oxalamidine and two new heterocycles.

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