Charge transfer molecular complexes of some azines with iodine

Charge-transfer molecular complexes of some diazines and 1,3,5-triazine with the sigma-electron acceptor iodine have been investigated spectrophotometerically in CHCl3 at 20 degrees C. Stability constants of the formed CT complexes were computed and discussed in terms of the donor molecular structure and solvent polarity. The thermodynamic parameters of complex formation, were determined and discussed. Further, 1:1 solid CT molecular complexes have been synthesized and characterized. It was deduced that the formed complexes are of strong n-sigma kind.