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 sele nium donor atoms have been reviewed and the corresponding thermodynamic par ameters (K and Delta H degrees) reported for a series of thiones, selones, sulfides and selenides. A survey of the several calculation Although the me thods and techniques employed are very different, some correlations between the thermodynamic parameters and other experimental data, such as v(I-I) R aman methods, based on UV-vis and in some cases C-13-NMR spectroscopies, is also reported, frequencies or UPS-binding energies, are reviewed and gener al conclusions drawn. (C) 1999 Elsevier Science S.A. All rights reserved.