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Differentiation of 2-alkylthioorotic acids, methyl and ethyl 2-alkylthioorotates
and hydrazides of 2-alkylthioorotic acids by using electron ionization mass spectra Grazyna Bartkowiak
Department of Supramolecular Chemistry, Faculty of
Chemistry, Adam Mickiewicz University, Grunwaldzka 6, 60-780 Poznań, Poland. E-mail: gbartkow@amu.edu.pl
ABSTRACT:
Electron ionization mass spectra of 12 derivatives of 2-
thioorotic acid have been discussed and general fragmentation routes of their molecular ions have been proposed. The compounds under discussion were three groups of four
chemical species (2-alkylthioorotic acid, methyl 2-alkylthioorotate, ethyl 2-alkylthioorotate and 2-alkylthioorotic hydrazide) each with the same relative molecular mass. The
comparison of selected ions relative abundances and their correlation with the abundance of molecular ions enable differentiation between isomeric or isobaric species in this class
of compounds.
Keywords:
orotic acid, 2-alkylthioorotic acids, esters, hydrazides, isomers, EI/MS
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