Abstract
This paper reports the results of a comparative study of the electron impact mass spectrometry data for a series of previously synthetized 5-arylidene-3-(4-chloro-benzyl)-4-thioxo-thiazolidin-2-one, and 5-arylidene-3-(2-biphenyl-4-yl-2-oxo-ethyl)-4-thioxo-thiazolidin-2-one derivatives. Theoretical calculations of molecular mechanics, MOPAC‒AM1, were used to explain the fragmentations observed.