Abstract Representatives of the homologous series of α, ω-diallylpermethyloligosilanes were synthesized for the first time by the reaction of α, ω-dichloropermethyloligosilanes Cl (Me 2 Si) n Cl (n= 2–6) with allylmagnesium chloride. Fragmentation of α, ω- diallylpermethyloligosilanes under electron impact ionization was studied by mass spectrometry.
