Trimethylsilylacetylene
Trimethylsilylacetylene is the organosilicon compound with the formula (CH3)3Si−C≡CH. A colorless liquid, "tms acetylene", as it is also called, is used as a source of −C≡CH anion in organic synthesis. == Use == Trimethylsilylacetylene is used in Sonogashira couplings as the equivalent of acetylene.