Abstract
Addition of triphenylsilane, trimethylsilane, or triethylsilane to [Cp*(PMe3)Rh(Me)(CH2Cl2)]BAr‘4 (4), a cationic Rh(III) complex, resulted in Si−H bond activation and release of methane below −80 °C. The rare, nonclassical silane complexes [Cp*(PMe3)Rh((C6H4)(η2-HSiPh2))]BAr‘4 (6), [Cp*(PMe3)Rh(SiMe3)(η2-HSiMe3)]BAr‘4 (9), and [Cp*(PMe3)Rh(SiEt3)(η2-HSiEt3)]BAr‘4 (11) have been generated and characterized by NMR spectroscopy. Of note was the presence of 29Si satellites of the hydride resonances of each of these compounds and large 1JSi-H coupling constants (56−84 Hz), diagnostic of the presence of η2-silane ligands.
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