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

Márta Juhász, Zita Załán, F. Fülöp, Kałevi Pihlaja

Research output: Contribution to journalArticle

4 Citations (Scopus)

Abstract

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
Volume20
Issue number23
DOIs
Publication statusPublished - 2006

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Phosphorus
Oxides
Ionization
Ions
Atoms
Electrons
Isomers
Substitution reactions
Fusion reactions
Derivatives
Molecules
isoquinoline

ASJC Scopus subject areas

  • Analytical Chemistry
  • Spectroscopy

Cite this

Electron ionization mass spectra of phosphorus-containing heterocycles. III. 1,3,4,2-Oxadiazaphosphinane 2-oxides. / Juhász, Márta; Załán, Zita; Fülöp, F.; Pihlaja, Kałevi.

In: Rapid Communications in Mass Spectrometry, Vol. 20, No. 23, 2006, p. 3595-3604.

Research output: Contribution to journalArticle

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