Elaidic (“EL-ay-id-ick”) acid undergoes this reaction to form stearic acid. A catalyst commonly used for this reaction consists of three triphenylphosphine (10[1])(“tri-FEN-ill-FOSS-fene”) groups bonded to a rhodium atom and is named for Wilkinson. This reaction is performed (10[1])in a “syn-” (“sin”) fashion (10[1])on a palladium or platinum catalyst. (10[1]-5[1])Due to isomerization, this reaction may introduce trans byproducts while making products less prone to auto-oxidation and more solid at room temperature. This type of addition reaction is used to produce margarine by reducing alkenes to saturated alkanes. (10[1])For 10 points, name this reaction in which (10[1])a molecule gains two atoms of the lightest element. ■END■ (10[5]0[2])