Abstract
The mass spectra of the
lanthanide chelates of thenoyltrifluoroacetone, viz. Met{CF3COCH=C(O-)-C4H3S}3
(Met = Sm, Eu, Gd, Tb), have been obtained. All four spectra display similar
fragmentation patterns. Fluorine migration to the metal with the concomitant
loss of :CF2 occurs with all four lanthanide chelates. Peaks were
observed for the ions [MetF2]+ (Met = Sm, Gd, Tb) and
[MetF]+ (Met = Sm, Eu). The occurrence of [MetF]+ in the
spectra of the samarium and europium chelates is in keeping with the tendency of
these two lanthanides to be reduced to the bivalent state. On the other hand,
oxidation of terbium(III) to terbium(IV) was not observed in the mass spectra.
Cited by
16 articles.
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