THE MASS SPECTRA OF SOME SUBSTITUTED THIOPHENE-2-CARBOXYLIC ACIDS
- 1 May 1982
- journal article
- research article
- Published by Taylor & Francis in Phosphorus and Sulfur and the Related Elements
- Vol. 13 (1) , 59-68
- https://doi.org/10.1080/03086648208078982
Abstract
The mass spectra of some 3-, 4-, and 5-substituted thiophene-2-carboxylic acids at 70 eV are reported. The majority of isomeric 5-and 3-substituted compounds can be differentiated by mass spectrometry. In 3-methyl-, 3-methoxy, 3-thiomethyl-, 3-methylsulphinyl-, 3-formyl-thiophene-2-carboxylic acids the fragmentation is influenced by an “ortho-effect” which activates the H2O elimination.Keywords
This publication has 25 references indexed in Scilit:
- THE MASS SPECTRA OF SOME THIOPHENE 2- AND 3-CARBOXANILIDESPhosphorus and Sulfur and the Related Elements, 1981
- The mass spectra of some substituted thiophene‐2‐carboxanilidesJournal of Heterocyclic Chemistry, 1981
- The fragmentation of 5‐ and 3‐substituted thiophene‐2‐carboxamides under electron impactJournal of Mass Spectrometry, 1980
- Letter to the editorJournal of Mass Spectrometry, 1980
- Substituent effects in mass spectrometry—III: Substituent effects in the dissociation of the molecular ions ofpara andmeta substituted benzoic acidsJournal of Mass Spectrometry, 1973
- Loss of CH2O and H2O by stepwise mechanisms in mass spectrometryJournal of Mass Spectrometry, 1971
- The mass spectra of carboxylic acids—III: The structures of molecular and fragment ions in benzoic acid and related moleculesJournal of Mass Spectrometry, 1970
- Organic Ions in the Gas Phase. XVI. Isomeric C7H5O+ Ions from Benzoic AcidJournal of the American Chemical Society, 1965
- Correlation of Mass Spectra with Structure in Aromatic Oxygenated Compounds. Methyl Substituted Aromatic Acids and AldehydesAnalytical Chemistry, 1961
- Mass Spectra of Aromatic EstersAnalytical Chemistry, 1960