CHARACTERIZATION OF NEW CYCLOSILOXAZANES USING BOTH GC MS AND GC/FT-IR/

Mixtures of cyclo-silazanes, -siloxanes and -siloxazanes (six- and eig ht-membered rings) were studied by low- and high-resolution electron-i mpact and by Fourier transform infrared spectroscopies coupled with ga s chromatography (GC/MS and GC/FT-IR). Even though chromatography did not allow us to isolate them, compounds could be characterized from th e FT-IR spectra and their frequencies assigned. Where several isomers occurs, different IR bands were assigned to each type of isomer. This study shows the interest of using both GC/MS and GC/FT-IR together for identifying compounds in mixtures.