Chloraminosilanes II. Preparation and spectroscopic studies on alkyl-(dimethylamino)chlorosilanes

Article abstract of DOI:10.1016/S0022-328X(00)90592-8

Several new compounds containing both chloro and dimethylamino groups linked to silicon have been prepared. The general method involved reacting a solution of the appropriate polychlorosilane in ether at ca. - 50° with a chilled ethereal solution of dimethylamine. Prepared in this fashion were CH₃Si(NMe₂)Cl₂, CH₃Si(NMe₂)₂-Cl, PhSi(NMe₂)Cl₂, PhSi(NMe₂)₂Cl, CH₃(H)Si(NMe₂)Cl, (CH₃)₂Si(NMe₂)Cl, CH₂CH(CH₃)Si(NMe₂)Cl, and Ph₂Si(NMe₂)Cl. Comparison of the spectra of these compounds with those in the perhalo and peramine series showed that replacement of NMe₂ for Cl resulted in an upfield shift of the resonances of the other groups linked to silicon, a shift which parallels that observed upon substitution of CH₃ for Cl. The relationship of ν(SiH) in the IR and δ(SiH) in the NMR spectra was linear.