Charge-transfer adducts between donors containing chalcogens (S and Se) and di-iodine: solution studies.

The solution equilibria related to the 1:1 charge-transfer adduct formation between molecular iodine and several substrates containing sulfur and selenium donor atoms have been reviewed and the corresponding thermodynamic parameters (K and ΔH°) reported for a series of thiones, selones, sulfides and selenides. A survey of the several calculation Although the methods and techniques employed are very different, some correlations between the thermodynamic parameters and other experimental data, such as ν(I-I) Raman methods, based on UV-vis and in some cases 13C-NMR spectroscopies, is also reported. frequencies or UPS-binding energies, are reviewed and general conclusions drawn.