To better understand why KOtBu deprotonates 3 instead of reacting with the silane groups, we decided to probe whether this preference is due to an electronic effect, or whether sterics may kinetically block a reaction on silicon. Therefore, we calculated the f n+1 Fukui function (Figure ) which shows that there is an electrophilic site on two of the methylene protons, while there is no contribution of the Fukui function visible on silicon. This indicates that the lack of reactivity has an electronic origin and is likely caused by the effective stabilization of the silylene by the hydrides.