In contrast with unsuccessful attempts at organoboration of diethynyldimethylsilane, the stannylated derivative, bis(trimethylstannylethynyl)dimethylsilane, (3), is shown to react quantitatively with trialkylboranes, BR3(R = Me, Et, Pr1) to give new silacyclopentadiene derivatives.
B. Wrackmeyer, J. Chem. Soc., Chem. Commun., 1986, 397 DOI: 10.1039/C39860000397
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