Mass spectra of diastereomeric 2,4-disubstituted 1,3-dioxa-2-silacyclohexanes

The mass spectra of diastereomeric 2,4-disubstituted 1,3-dioxa-2-silacycloh exanes are studied using a gas chromatograph-mass spectrometer-computer sys tem. The stabilities of molecular ions and the intensity ratios of the peak s of fragment ions formed by the loss of substituents at silicon in the mol ecular ion are compared. The probabilities of specific fragmentation pathwa ys depend on the orientation of substituents. A correlation is revealed bet ween the retention times of stereoisomers in the chromatographic column and their structures. The results can be used for identification of compounds formed by condensation of diols with disubstituted silanes.