Evolved gas analysis–ion-attachment mass spectrometry (EGA–IAMS) indicates that Mn(CO)5 and Mn2(CO)9 free radicals are produced in the gas phase by pyrolysis of Mn2(CO)10 in an infrared image furnace. The Li+-adduct mass spectra of the pyrolysis products contained peaks at m/z 202 and 369 for Mn(CO)5Li+ and Mn2(CO)9Li+, respectively, providing direct evidence that d-metal complex radicals were formed in the furnace. We studied the effect of temperature on the rate of production of the radicals, and confirmed the presence of the compounds Mn(CO)5 and Mn2(CO)9, which were reported in earlier studies based on electron-impact mass spectrometry, electron spin resonance spectroscopy, and Fourier transform infrared spectroscopy.
Research on Chemical Intermediates – Springer Journals
Published: Jun 29, 2011
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