Abstract
Abstract The synthesis of medium to large-membered cyclic silicon-butadiyne compounds (‘extended silapericyclynes’) was accomplished by the reaction of dilithiobutadiyne with dichlorodiisopropylsilane. The cyclic tetramer, pentamer, hexamer, and heptamer were obtained in 8%, 5%, 4%, and 2% yields, respectively. The structure of the tetramer was determined, and column-like packing was observed. The UV spectra of all compounds are also shown.
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