Metastable Ion Study of Organosilicon Compounds VI - Triethoxymethylsilane and Tetraethoxysilane

Article abstract of DOI:10.1002/oms.1210280425

The fragmentations of triethoxymethylsilane ((C2H5O)3SiCH3 (1)) and tetraethoxysilane ((C2H5O)4Si (3)) induced by electron impact were investigated by mass-analysed ion kinetic energy (MIKE) spectrometry and a deuterium-labelling study.These molecular ions begin to fragment by the loss of methyl, ethyl and/or ethoxy radicals.Almost complete scrambling of methylene hydrogen takes place in these resultant intermediate ions, prior to the elimination of acetaldehyde molecule.The fragmentations of <1>^+. and <3>^+. were compared with those of the corresponding carbon analogues, 1,1,1-triethoxyethane ((C2H5O)3CCH3 (2)) and tetraethoxymethane ((C2H5O)4C (3)), respectively.