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The reactions of hydrogermylation of allylsilanes and -germanes R3MAll (M = Si, Ge; R = Cl, EtO, Me) by hydridogermanes R3GeH (R = Cl, Me) and trichlorogermane etherate 2Et2O·HGeCl3 were studied. It was found that small amounts of mono- (β- and γ-adducts) and double germylation products and, mainly, polymers were formed in the reactions with the etherate. In the case of hydrogermylation of Me3SiAll with trichlorogermane, insignificant amounts of β-adduct were recorded, but in the entire series of the experiments with Cl3GeH mainly γ-adducts were formed. The catalytic reactions of allylsilanes and -germanes with trimethylgermane gave exclusively γ-adducts, irrespective of the framing of the silicon and germanium atoms. A scheme of the possible course of the studied reactions was proposed. The synthesized compounds were identified by gas-liquid chromatography, 1H and 13C NMR spectroscopy, and chromatography-mass spectrometry methods. [ABSTRACT FROM AUTHOR]

The hydrosilylation reactions of allylsilanes R3SiAll (R = Cl3, Me3) with methylchlorohydridesilanes MenCl3–nSIH (n = 0–2) and symmetrical tetramethyldisiloxane in the presence of the Karstedt catalyst have been studied. It has been found that the change in reactivity of allylsilanes in these reactions has been similar to the allylgermanes, except for the reaction of allyltrichlorosilane with dimethylchlorosilane, probably due to lower electronegativity of the Cl3Si group as compared to the Cl3Ge group. The allylsilanes have shown higher reactivity in these reactions than the isostructural allylgermanes. A scheme of the possible course of the studied reactions has been proposed. The synthesized compounds have been identified using 1H NMR spectroscopy and chromatography–mass spectrometry. [ABSTRACT FROM AUTHOR]