After they are activated by trifluoroacetic acid, these compounds are the hydride source for ionic hydrogenation. Bifunctional coupling agents named for having these organic compounds as head groups are used to adhere polymers to inorganic surfaces. These compounds form adducts with active hydrogens to derivatize polar analytes before gas chromatography. (10[1])In a process named for these compounds, they self-assemble on surface-exposed (-5[1])oxygens to form a monolayer that end-caps chromatography columns and renders glass chemically inert. (-5[1])Chlorinated and branched examples of these compounds, such as TBSCl (-5[1])(“T-B-S-C-L”), form ethers (10[1]-5[1])in the most common method (10[1])to protect (10[1])alcohols. (10[1]-5[3])One of these compounds bearing four methyl groups (10[1])is assigned a chemical (10[1])shift of 0 ppm (10[1])in NMR. (10[1]-5[1])For 10 points, (-5[1])name these hydro·carbons that contain (-5[1])an atom of the element below carbon on the (10[1])periodic table. (10[3])■END■ (10[5]0[4])