Abstract
Gas-phase ion–molecule reactions of buckminsterfullerene (C60) with the ion systems generated from the self-chemical ionization of alkyl methyl ethers (CH3OR, R = n-C2H5, n-C3H7, n-C4H9) were studied in the ion source of a mass spectrometer. The adduct cation [C60C2H5O]+ and protonated molecule [C60 H]+ were observed as the major products. The former adduct ion was produced by the reactions of C60 with the methoxymethyl ion [CH3OCH2]+, and the latter resulted from the proton transfer reactions from protonated alkyl methyl ethers to C60. It is suggested that the [3+2] cycloadduct to a 6–6 bond of C60 (a C–C bond common to two annulated six-membered rings) is the most favorable structure among the probable isomers of [C60C2H5O]+. © 1998 John Wiley & Sons, Ltd.
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