Abstract The reaction of [bis (diisopropylamino) boryl] acetylene with 2 equiv. of HCl and 1 equiv. of dithiocatechol or 2-hydroxythiophenol yields the corresponding monoborylacetylenes 1 and 2, respectively. Diborylacetylenes 3 and 4 are obtained from the reactions of bis (trimethylstannyl) acetylene with 2 equiv. of bromoboranes. Treatment of chlorobis (diisopropylamino) borane with LiC≡ C− EMe 3 (E= C, Si) leads to the ...
