Organoboron compounds 376. Mass-spectrometric study of derivatives of 1,2-azaborqlidine and 1,2-oxaborolane

1. Upon exposure to electron impact the decomposition of the molecular ions of 1,2-azaborolidines with an alkyl group at the boron atom involves mainly the formation of a [M-R]+ ion by the splitting off of an alkyl group and elimination of a R-CH3 group under formation of a [M-(R-CH3)]+ ion. 3. For derivatives of 1,2-oxaborolane the processes of ring destruction are much more distinctly developed than for 1,2-azaborolidines.