The syntheses of the first examples of selenoparabanic acid derivatives (dialkylimidazolidine-2-selone-4, 5-dione, 3eR R= Me, Et, Bu) are presented along with the X-ray crystal structure determination of 3eEt. To gain an insight in the properties of parabanic acid derivatives on the basis of their electronic structures, we report the results of comparative hybrid-DFT calculations performed on parabanic, thioparabanic, and ...
