Infrared spectroscopic observation of the McLafferty rearrangement in ionized 2-pentanone
作者： Ryo Yasumoto , Yoshiyuki Matsuda , Asuka Fujii
DOI: 10.1039/D0CP02602F
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摘要: The McLafferty rearrangement is a well-known process in mass spectrometry. In ionization of organic molecules containing carbonyl group, β cleavage occurs following transfer hydrogen atom aliphatic CH at the γ position to group. Although has undergone numerous spectrometric investigations, no spectroscopic investigation enolized radical cation generated been carried out. 2-Pentanone simplest ketone bonds position. this study, infrared predissociation spectroscopy for both neutral and ionized 2-pentanone gas phase through vacuum ultraviolet detection performed investigate ionization-induced isomerization observe product. An OH stretch band observed spectrum 2-pentanone, demonstrates its enolization accompanying an alkyl hydrogen. theoretically supported by reaction path search based on anharmonic downward distortion method.
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