Copper(I) ''t''-butoxide is an alkoxide of copper(I). It is a white sublimable solid. It is a reagent in the synthesis of other copper compounds. The compound was originally obtained by salt metathesis from

lithium tert-butoxide Lithium ''tert''-butoxide is the metalloorganic compound with the formula LiOC(CH3)3. A white solid, it is used as a strong base in organic synthesis. The compound is often depicted as a salt, and it often behaves as such, but it is not ionized ...

and

copper(I) chloride Copper(I) chloride, commonly called cuprous chloride, is the lower chloride of copper, with the formula CuCl. The substance is a white solid sparingly soluble in water, but very soluble in concentrated hydrochloric acid. Impure samples appear gre ...

. An octameric form was obtained by alcoholysis of mesitylcopper:{{cite journal, title=Copper(I) alkoxides: preparation and structural characterisation of triphenylmethoxocopper(I) and of an octanuclear form of t-butoxocopper(I) , authors=Håkansson, M.; Lopes, C.; Jagner, S., journal=Inorganica Chimica Acta, year=2000, volume=304, issue=2 , pages=178–183, doi=10.1016/S0020-1693(00)00081-5 :8 CuC₆H₂Me₃ + 8 HOBu-t → 8 HC₆H₂Me₃ + uOBu-tsub>8

References

Copper(I) compounds Tert-butyl compounds Alkoxides