13C, 17O, and 29Si NMR Spectra and Stabilization of Silylated Ketenes and Bisketenes
The experimental and calculated 13C, 17O, and 29Si NMR chemical shifts of silylated ketenes and bisketenes show trends consistent with charge redistribution resulting from neutral hyperconjugative donation from the R3Si-C bond to the p orbital on the carbonyl carbon, and are supportive of this mechanism for the striking stability of these species.