Electron ionization mass spectra of phosphorus-containing heterocycles. III. 1,3,4,2-Oxadiazaphosphinane 2-oxides

Márta Juhász, Zita Załán, Ferenc Fülöp, Kałevi Pihlaja

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4 Citations (Scopus)


The 1,3,4,2-oxadiazaphosphinane 2-oxides differ not only in the relative configuration of the P atom (R* or S*), but also in many other ways such as the ring size, ring fusion, P substitution and bridgehead N atom whose effects on their fragmentations have been studied. Some fragmentations resembled those of 3,1,2-oxazaphosphinane 2-oxides and 1,3,2-diazaphosphinane-2-oxides, but new routes were also found, initiated by ionization at the bridgehead N atom. The relative abundances of the molecular ions and some fragment ions allowed the differentiation of cis-trans epimers. Compounds with n = 2 and R=N(CH2CH2Cl)2, and linearly or angularly isoquinoline-fused isomers in most cases, gave more numerous ions with lower relative abundances than the other compounds in this series. Only the isoquinoline derivatives provided fragments resulting from ionization of the aromatic part of the molecule.

Original languageEnglish
Pages (from-to)3595-3604
Number of pages10
JournalRapid Communications in Mass Spectrometry
Issue number23
Publication statusPublished - Dec 12 2006


ASJC Scopus subject areas

  • Analytical Chemistry
  • Spectroscopy
  • Organic Chemistry

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