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Methane positive‐ion chemical ionization mass spectra of phenols
Author(s) -
Iida Yoshio,
Daishima Shigeki,
Shibata Akihiro
Publication year - 1993
Publication title -
organic mass spectrometry
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.475
H-Index - 121
eISSN - 1096-9888
pISSN - 0030-493X
DOI - 10.1002/oms.1210280428
Subject(s) - chemistry , mass spectrum , ion , phenols , adduct , chemical ionization , electron ionization , reagent , mass spectrometry , medicinal chemistry , analytical chemistry (journal) , ionization , alkyl , organic chemistry , chromatography
Positive‐ion chemical ionization mass spectra for 48 phenols were measured using methane as the reagent gas in order to clarify their characteristics. The ion species obtained were almost identical with those generated in alkyl‐benzenes except for dehydrated ions produced from MH + and adduct ions, in particular compounds such as pyrocatechol. Specific ions such as C 6 H 7 O + ( m / z 95) and C 8 H 11 O + ( m / z 123) in phenol derivatives (C 6 H 4 · OH · R; R = C n H 2 n + 1 , n ≥ 3) and [C 7 H 9 O] + ( m / z 109) and C 9 H 13 O + ( m / z 137) in cresol derivatives (C 6 H 3 · OH · CH 3 · R) were formed, respectively, by alkene elimination reaction from MH + and [M + C 2 H 5 ] + . The characteristic [M + 13] + and [M + 15] + ions observed in several phenols were identified as [M + C 3 H 5 – C 2 H 4 ] + ([M + CH] + ) and [M + C 3 H 7 – C 2 H 4 ] + ([M + CH 3 ] + ), respectively, by tandem mass spectrometry.