Study on Mass Spectra of Multifunctional Group MOleeules Ⅳ—The Fragmentation Mechanism[J]. Journal of Chinese Mass Spectrometry Society, 1992, 13(3): 62-62.
Citation: Study on Mass Spectra of Multifunctional Group MOleeules Ⅳ—The Fragmentation Mechanism[J]. Journal of Chinese Mass Spectrometry Society, 1992, 13(3): 62-62.

Study on Mass Spectra of Multifunctional Group MOleeules Ⅳ—The Fragmentation Mechanism

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  • The accurate mass and metastable ion detections of symmetrical molecule 2,6—(bisdimethylaminomethyl)—4—ethyl phenol dihydrochloride demonstrated. (1) the respective fragments m/z 176, 191, 192, 193, 161 are formed from molecular ion M~+ on the fragmentation mechanism via various cleavage modes; (2)the base peak at m/z 191 is formed with the loss of a neutral molecule via the ortho effect; (3) the base peak m/z 191 may further be cleaved to form fragments m/z 147, 132, 91; (4) the cleavage of C--N bond in side chain of amine group attached to benzene ring is simillar to the symmetrical molecules and on the contrary, dissimilar to the asymmetrical molecules in which the C--N bond is stable and does not cleave.On the basis of fragmentation mechanism~([1.2]), comparison between the ortho effects of asymmetrical and symmetrical molecules showed obvious distinctions of them.
  • [1]
    张占旺等,质谱学报,8(2) ,39

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