ISSN:
0030-493X
Keywords:
Chemistry
;
Analytical Chemistry and Spectroscopy
Source:
Wiley InterScience Backfile Collection 1832-2000
Topics:
Chemistry and Pharmacology
Notes:
The possible existence of the ylides CH2CIH, CH25FH and CH2OH2 as stable neutral species in the gas phase has been investigated by the neutralization-reionization (NR) mass spectrometry of their radical cations using a double-focusing mass spectrometer of reversed geometry. The experiments were, for the most part, performed under single-collision conditions with Xe as the neutralization target gas and He and O2 as reionization agents. For each ylidion a peak was observed in their NR mass spectrum which indicated that the neutral ylide had apparently been produced. However for CH2FH+· and CH2OH2+· the m/z 34 and m/z 32 peaks, respectively, were attribut-able to interferences from the natural isotopic abundance of ions of lower mass. For CH2CIH+·, the NR recovery signal was found to arise from the presence of CH3CI+· as an impurity in the ylidion flux. This was proved by examination of the collisional activation mass spectra of the [C, H3, CI]+· ions produced in the NR mass spectra of the conventional ions and ylidions, an experiment performed using a triple-sector mass spectrometer.
Additional Material:
11 Ill.
Type of Medium:
Electronic Resource
URL:
http://dx.doi.org/10.1002/oms.1210230302
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