Abstract
The bis(amidinato)silylene [iPrNC(Ph)NiPr]2Si and the analogous bis(guanidinato)silylene [iPrNC(NiPr2)NiPr]2Si react with the Lewis acids BPh3 and AlPh3 to form the respective Lewis acid/base adducts 4–7 (adduct 4 has already been described). Compounds 5 and 7 are the first silylene–alane adducts and the first five-coordinate silicon(II) compounds with an Si–Al bond, and 6 and 7 represent the first silylene–borane and silylene–alane adducts, respectively, that are derived from a bis(guanidinato)silylene. Compounds 4–7 were characterized by single-crystal X-ray diffraction and solid-state NMR spectroscopy (11B, 15N, 27Al, 29Si), and 4 and 5 were additionally studied by NMR spectroscopy in solution (1H, 11B, 13C, 27Al, 29Si).
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