International Journal of Spectroscopy / 2012 / Article / Tab 4 / Research Article
Gas Chromatography Electron Ionization Mass Spectral Analysis of Thio Analogues of Pyrimidine Bases: 5-Bromo-2,4-di-o -(m - and p -) chloro- (bromo-)benzylthiouracils and 6-methyluracils Table 4 Retention times of 5-bromo-2,4-di-o m p 1–12 .
Compound name Compound number Chemical formula Molecular weight (average) Retention time (min) 5-bromo-2,4-di-o -chloro-benzylthiouracil 1 C18 H13 N2 S2 Cl2 Br 472.256 34.52 5-bromo-2,4-di-m -chloro-benzylthiouracil 2 C18 H13 N2 S2 Cl2 Br 472.256 35.21 5-bromo-2,4-di-p -chloro-benzylthiouracil 3 C18 H13 N2 S2 Cl2 Br 472.256 37.86 5-bromo-2,4-di-o -bromo-benzylthiouracil 4 C18 H13 N2 S2 Br3 561.159 45.71 5-bromo-2,4-di-m -bromobenzylthiouracil 5 C18 H13 N2 S2 Br3 561.159 47.66 5-bromo-2,4-di-p -bromobenzylthiouracil 6 C18 H13 N2 S2 Br3 561.159 53.50 5-bromo-2,4-di-o -chlorobenzylthio-6-methyluracil 7 C19 H15 N2 S2 Cl2 Br 486.283 36.98 5-bromo-2,4-di-m -chlorobenzylthio-6-methyluracil 8 C19 H15 N2 S2 Cl2 Br 486.283 37.44 5-bromo-2,4-di-p -chloro benzylthio-6-methyluracil 9 C19 H15 N2 S2 Cl2 Br 486.283 40.13 5-bromo-2,4-di-o -bromo benzylthio-6-methyluracil 10 C19 H15 N2 S2 Br3 575.186 49.49 5-bromo-2,4-di-m -bromobenzylthio-6-methyluracil 11 C19 H15 N2 S2 Br3 575.186 51.06 5-bromo-2,4-di-p -bromobenzylthio-6-methyluracil 12 C19 H15 N2 S2 Br3 575.186 57.27
