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Electron Impact Mass Spectra of 3‐Aryl‐3‐hydroxyl‐2,2,4,4‐tetramethylcyclobutanones and Related Compounds
Author(s) -
Lin ShawTao,
Lin WenChung,
Chao Richard YungHo,
Huang ChingLiang
Publication year - 2000
Publication title -
journal of the chinese chemical society
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.329
H-Index - 45
eISSN - 2192-6549
pISSN - 0009-4536
DOI - 10.1002/jccs.200000123
Subject(s) - chemistry , aryl , mass spectrum , fragmentation (computing) , benzene , electron ionization , spectral line , ring (chemistry) , ionization , hydrolysis , medicinal chemistry , mass spectrometry , computational chemistry , organic chemistry , ion , alkyl , physics , chromatography , astronomy , computer science , operating system
Abstract 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.