An unprecedented ortho effect in mass spectrometric fragmentation of even-electron negative ions from hydroxyphenyl carbaldehydes and ketones |
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| Authors: | Athula Attygalle Josef Ruzicka Deepu Varughese Jafri Sayed |
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| Affiliation: | Center for Mass Spectrometry, Department of Chemistry and Chemical Biology, Stevens Institute of Technology, Hoboken, NJ 07030, United States |
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| Abstract: | A mass spectrometric peak for a carboxylate anion is observed in collision-induced dissociation (CID) mass spectra recorded from negative ions derived from ortho isomers of hydroxyphenyl carbaldehydes and ketones. For example, CID spectra of 2-hydroxy derivatives of benzaldehyde, acetophenone, propiophenone, isobutyrophenone, and pivalophenone show peaks at m/z 45, 59, 73, 87, and 101 for the formate, acetate, propionate, isobutyrate, and pivalate anions, respectively. |
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| Keywords: | ESI-MS Ortho effect Collision-induced dissociation (CID) Negative-ion mass spectrometry Hydroxybenzaldehyde Hydroxyacetophenone |
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