Elaidic (“EL-ay-id-ick”) acid undergoes this reaction to form stearic acid. A catalyst commonly used for this reaction consists of three (10[1])triphenylphosphine (10[1])(“tri-FEN-ill-FOSS-fene”) groups (10[1])bonded to a rhodium atom (-5[1])and is named for (10[1])Wilkinson. (10[2]-5[1])This reaction (10[1]-5[1])is (10[1])performed (10[1])in a “syn-” (“sin”) fashion (10[1])on a palladium (10[2])or platinum (10[1]-5[3])catalyst. (10[7]-5[3])Due to isomerization, (10[2]-5[1])this (-5[1])reaction (-5[1])may introduce (-5[1])trans byproducts (10[2])while making products (-5[2])less (10[1])prone to (-5[1])auto-oxidation (-5[1])and more solid (10[1])at room temperature. (10[4]-5[1])This (10[1])type of addition (10[1]-5[1])reaction (-5[1])is used (10[1])to produce margarine (10[1]-5[2])by reducing (10[1])alkenes (10[6])to saturated (10[4]-5[2])alkanes. (10[4]-5[2])For 10 points, (10[2])name this (10[1])reaction in which (10[1])a molecule (10[1]-5[1])gains (10[1])two atoms (-5[4])of the lightest (-5[1])element. (10[2])■END■ (10[57]0[27])