Organoboron compounds. 367. Mass-spectrometric study of the inner complexes of 3-aminopropyldialkylboranes and some of their derivatives

1. The principal dissociation route of the molecular ions of the inner complex 3-aminopropyldialkylboranes and 3-cyclohexyldeneaminopropyldialkylboranes is the splitting off of the alkyl groups on the boron with formation of ions of the type (M-R)+ and [(M-R) —(R1−H)]+. 2. For acyloxy- or hydroxy(3-aminopropyl)alkylboranes, besides splitting off of an alkyl group, the cleavage of an AcOH or H2O molecule respectively was a characteristic feature. For N-disubstituted compounds possessing an OH, Cl, or OAc group in addition to an alkyl group on the boron atom, the alkyl group was predominantly split off from the M+. ion.