An extraordinary downfield-shifted <sup>29</sup> Si{<sup>1</sup> H} NMR signal is seen at δ=338.5 for the platinum silylene complex [(dippe)(H)Pt=SiMes<sub>2</sub> ][MeB(C<sub>6</sub> F<sub>5</sub> )<sub>3</sub> ] (2). This remarkably stable metal silylene complex was obtained from 1 in the first intramolecular 1,2-hydride migration from silicon to a transition metal. dippe=iPr<sub>2</sub> PCH<sub>2</sub> CH<sub>2</sub> PiPr<sub>2</sub> , Mes=2,4,6-Me<sub>3</sub> C<sub>6</sub> H<sub>2</sub> .
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