Abstract
AbstractThe mass spectral decompositions of cyclic and acyclic borates have been examined. Straight chain trialkyl borates fragment by CO cleavage reactions accompanied by transfer of one or two hydrogen atoms, whereas tri‐(sec‐alkyl) borates primarily undergo α‐cleavage reactions. Both types of cleavage are observed in the fragmentation of cyclic borates. BO bonds are not broken in the formation of most major fragment ions. The fragmentations of borates are compared with those of phenylboronates with special emphasis on the rearrangements leading to hydrocarbon ions in the spectra of the latter.
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