“…They argue, however, that the order of stability should be reversed in solution. For the derivative with R=Cl,18 a preference for the inverted structure of 26.0 kcal mol −1 37 was obtained. Detailed density functional theory (DFT) studies on X n H 3− n SiM (M=Li, Na, X=F, Cl, Br) molecules showed an increased stability of the inverted forms with increasing number and size of the halogens 38, 39…”