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Der [M+11] + ‐Pik in den Massenspektren von Diaminen 38. Mitteilung über massenspektrometrische Untersuchungen
Author(s) -
Kühne Hardy,
Hesse Manfred
Publication year - 1982
Publication title -
helvetica chimica acta
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.74
H-Index - 82
eISSN - 1522-2675
pISSN - 0018-019X
DOI - 10.1002/hlca.19820650521
Subject(s) - chemistry , mass spectrum , condensation , formaldehyde , diamine , acetaldehyde , methanol , impurity , medicinal chemistry , ion , polymer chemistry , organic chemistry , ethanol , physics , thermodynamics
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 CH 3 . 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.