Chiroptical spectra of 1,2-cyclopropanedicarboxylic monotioimides

摘要

The structure, electronic absorption spectra, and chi- roptical properties of imides have been a subject of considerable interest in recent years. These compounds show two weak n-π absorption bands followed by a moderately intense π-π transition in the region of 270- 200 nm as predicted by semiempirical MO calculations. It is well known that the substitution of sulfur for oxygen In the carbonyl group shifts absorption maxima to much Longe wavelengths.