- 作者: Shaw-Tao Lin, Wen-Chung Lin, Richard Yung-Ho Chao and Ching-Liang Huang
- 中文摘要: The mass spectra of 3-aryl-3-hydroxyl-2,2,4,4-tetramethylcyclobutanones and their related compounds were studied. The arylcyclobutanones and their ketal forms demonstrate similar fragmentation patterns but with different observed common peaks, I.e., [M-70]+ and 114 amu, as the base peaks for compounds arylcyclobutanones and their ketal forms, respectively. 1-Aryl-2,2,4-trimethyl-1,3-pentadiones, obtained from hydrolysis of cyclobutanones, gave either 43 amu or [Ar-CO]+ as the peaks, depending on the substituents on the benzene ring. These compounds are good examples of how the relative ionization potentials of the possible fragments govern the observed mass spectra.
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