Synthesis, characterization and spectroscopic structural studies of charge-transfer complexes of 1,4,8,11-tetraazacyclotetradecane-5,7-dione with iodine, TCNE and DDQ Academic Article uri icon


  • Three novel aqueous and solid charge-transfer complexes are synthesized by the reaction of the polynitrogen cyclic n-donor 1,4,8,11- tetraazacyclotetradecane-5,7-dione (TACTDD) with the -acceptor iodine, the aliphatic -acceptor tetracyanoethylene (TCNE) as well as with the aromatic -acceptor 2,3-dichloro-5,6-dicyano-1,4-benzoquinone (DDQ) using chloroform as the medium solvent. Photometric titration measurements of the CT-solution complexes confirm the donor to acceptor ratios are 1:2 for TACTDD-I 2 and TACTDD-TCNE reactions while is 1:1 for the reaction TACTDD-DDQ. These reaction stoichiometries are supported by the elemental, thermal and infrared measurements for the formed CT-solids. Accordingly, the reaction products are formulated as [(TACTDD) I]I 3 , [(TACTDD)(TCNE) 2 ] and [(TACTDD)(DDQ)]. The effect of the substituents, electron donating or withdrawing groups in the donor and acceptors compositions on their CT-interactions is discussed. 2010 Elsevier B.V. All rights reserved.

published proceedings


author list (cited authors)

  • Nour, E., AlQaradawi, S. Y., Mostafa, A., Shams, E., & Bazzi, H. S.

citation count

  • 22

complete list of authors

  • Nour, El-Metwally||AlQaradawi, Siham Y||Mostafa, Adel||Shams, Eman||Bazzi, Hassan S

publication date

  • January 1, 2010 11:11 AM