A dropping funnel was charged with Si i Pr3Cl (45.0 mL, 2.1 eq.) and this was added dropwise to the reaction mixture at room temperature. The reaction mixture was stirred at reflux (100 ℃) overnight, and became purple in color. This was allowed to cool and was filtered into a 3neck round bottom Schlenk (500 mL) through a fritted Schlenk via a wide-bore cannula. The solvent was removed from the resultant yellow-orange solution under vacuum to yield a yellow/orange oily-solid, with crystalline material forming when dried in vacuo. The oil was washed with pentane (100 mL), filtered and the remaining off-white solid was dried in vacuo.