Bis(trimethylsilyl)acetylene

[14630-40-1] C8H18Si2 (MW 170.40) InChI = 1S/C8H18Si2/c1-9(2,3)7-8-10(4,5)6/h1-6H3 InChIKey = ZDWYFWIBTZJGOR-UHFFFAOYSA-N (nucleophile in Friedel–Crafts type acylations and alkylations; lithium trimethylsilylacetylide precursor; cycloaddition substrate) Alternate Name: BTMSA. Physical Data: mp 26 °C; bp 136–137 °C; d 0.752 g cm−3. Solubility: sol all commonly used organic solvents. Form Supplied in: clear liquid; widely available. Preparative Method: from acetylene by treatment with n-Butyllithium followed by Chlorotrimethylsilane.1 Handling, Storage, and Precautions: the liquid is flammable and an irritant. Use in a fume hood.