Chemistry of organosilicon compounds. 292. An NMR study of the formation of silyloxonium ions by using tetrakis [3, 5-bis (trifluoromethyl) phenyl] borate as …

M Kira, T Hino, H Sakurai

Index: Kira, Mitsuo; Hino, Takakazu; Sakurai, Hideki Journal of the American Chemical Society, 1992 , vol. 114, # 17 p. 6697 - 6700

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Citation Number: 96

Abstract

Abstract: The capability of tetrakis [3, 5-bis (trifluoromethyl) phenyl] borate (TFPB) as a counteranion for organosilicenium ions was investigated by NMR spectroscopy. Although reactions of hydrosilanes with trityl-TFPB did not give the corresponding silicenium ions as long-lived species in dichloromethane-d2, the reactions produced rather stable silyloxonium ions in the presence of ethers at low temperatures. The evidence for the formation of cyclic ...