Abstract An infrared investigation on N-methyloxazolidine-2-thione and-2-selenone in the range 4000–200 cm− 1 is reported. The direct comparison of the ir spectra for these compounds allowed us to identify the vibrations related to CS and CSe, and support the previous assignments of the CS modes in the oxazolidine-2-thione; for this compound it has not been possible to synthesize its selenium isologue. On the whole, these experimental ...
