Complexation of iodine with macrocyclic polyethers and sulfides

The complexation of iodine with 12-, 15-, and 18-membered crown ethers containing two sulfur atoms in the macrocyclic ring was studied by the spectrophotometric method. It was shown that, in CCl₄, the stability constants of complexes with a 11 composition have a value of the order of magnitude of 10². The enthalpies of complexation are (22–34) kJ/mole, which is practically not different from the parameters of complexes of iodine with simple sulfides.Translated from Teoreticheskaya i Éksperimental'naya Khimiya, Vol. 24, No. 6, pp. 747–750, November–December, 1988.