Abstract
Interactions of DMF with hydrosilanes were studied by 29Si NMR. New resonance signals were observed in the 29Si NMR spectra of HMe2SiOSiMe2H and some (alkoxy)hydrosilanes for high ratios of concentrations [DMF]/[H-silane] at 25 °C. The intensities of new signals increased several times at 60 °C. It seems that these new resonances correspond to molecular complexes of DMF with hydrosilanes. The role of DMF in the mechanism of dehydrocoupling of hydrosilanes with hydroxylic reagents in the presence of Zn(II) and Cd(II) halides (X = Cl, Br, I) is discussed. Some common features of the reaction mechanism with the mechanism of hydride transfer from the SiH bond to the carbenium ion are discussed.Key words: hydrosilanes, hydroxylic reagents, reaction mechanism of dehydrocoupling in DMF, 29Si NMR.
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