Doubly Lithiated Oligosilanes : Synthesis and Structure of the First Vicinal Dilithiodisilane
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Reaction of cyclotrisilane 1 with lithium yields, depending on the reaction conditions, either the trisilane 2 lithiated at the terminal positions or the vicinal dilithiodisilane 3. These silanes are the first examples of this class of compounds and the first to be characterized by X-ray structure analysis. Ar = 2-(Me2NCH2)C6H4.