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99 MHz 29Si{1H} NMR spectra (toluene-d8, 253 K) of the rearrangement of germyl toluenium ion 3(C7D8) (•) to silyl toluenium 8(C7D8) (*) (↓ iPr3SiMe). (a) Spectrum 2 h after the addition of [iPr3Si(C7D8)][B(C6F5)4]; (b) after 9 h; (c) after 25 h; (d) after 120 d at 210 K.
