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- W2048936481 abstract "Structure Reactivity Correlations on Coordinatively Unsaturated Metal Chelate Complexes. XI. Effect of the Central Atom and the Ligands on the Mass Spectrometric Fragmentation of Chelate Complexes with Macrocyclic and Open Chain Schiff Base Ligands The influence of the central atom on the mass spectrometric fragmentation of the compounds 1–5 is compared. Whereas the ligands (Mt = 2H) show a strong fragmentation with a farreaching cleavage, the metal complexes with exception of Cu-4 and Cu-5 show always the molecular ion signal as the base peak. The main fragmentions [M-C2H5O]⊕, [M-2(C2H5O)]2⊕, [M-C2H4]⊕., and [M-C2H4CO2]⊕. may be related to the ‘cyclidene’ structures 6–7, the carboxylic acid 8, and its decarboxylation product 9. In the case of the copper chelates 1–4 the fragment [M-C2H6O].⊕/2⊕ with one or two positive charges is dominating over the peak [M-C2H5O]⊕. This may be due to the abstraction of one H from an ethylene (type 1, 2, 4) or a methyl (type 3) group with concomitant reduction to Cu(I) (10) or oxidation to Cu(III) (11)." @default.
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- W2048936481 title "Struktur-Reaktivitäts-Beziehungen bei koordinativ-ungesättigten Chelatkomplexen. XI, Einfluß des Zentralatoms und der Ligandstruktur auf die Massenspektrometrische Fragmentierung von Chelatkomplexen makrocyclischer und offenkettiger Schiffscher Basen" @default.
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- W2048936481 doi "https://doi.org/10.1002/prac.19893310405" @default.
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