Der [M+11]+-Pik in den Massenspektren von Diaminen 38. Mitteilung über massenspektrometrische Untersuchungen

The [M+ U]⁺-Peak in the Mass Spectra of Diamines The mass spectra of di- and polyamines containing a 1,2-ethandiamine or a 1,3-propandiamine unit are quite often characterized by [M+ 1l]⁺-peaks. It is demonstrated that these peaks correspond to a fragment-ion formed by loss of H. from a formaldehyde-condensation product (e. g. 15) or by loss of CH³. from a acetaldehyde-condensation product (e. g. 16 ) with the diamine. The aldehydes are usually impurities in solvents (especially methanol) used by chromatography, synthesis etc. of the diamines.