AlMe 3 (2.0 M in toluene, 3.82 cm 3 , 7.64 mmol) was slowly added by syringe to a stirred solution of TEPO (1.0233 g; 7.6275 mmol) in toluene (10 cm 3 ) at room temperature. All volatiles were then removed under dynamic vacuum at room temperature to obtain the pure product as a colorless viscous liquid with a negligible vapor pressure (1.5813 g; 100.5 %).