Mass spectrometric studies on some macrocyclic, macrobicyclic and macroacyclic Schiff bases

The mass spectrometric behaviour of four macrocyclic, one macrobicyclic and one macroacyclic Schiff bases, obtained by one-step multiple condensation reactions of 2,6-diformyl-4-methylpropane, 1,3-diamino- 2,2-dimethylpropene, 1,5-diamino-3-oxapentane or tris-(2-aminoethyl) amine under fast-atom bombardment conditions, was studied in detail with the aid of mass-analyzed ion kinetic energy spectrometry. The mass spectrometric behaviour of a mononuclear macrobicy La(III) complex is also described.