SPECTROSCOPIC STUDIES OF THE REACTIONS OF PI-ELECTRON ACCEPTORS WITH THE CYCLIC POLYAMINE 1,4,8,11-TETRAAZACYCLOTETRADECANE

The reactions of pi-electron accepters such as 1-chloro-2,4,6-trinitro benzene (picryl chloride), 7,7',8,8'-tetracyanoquinodimethane (TCNQ), tetrachloro-p-benzoquinone (chloranil) and tetracyanoethylene (TCNE) w ith the cyclic polyamine base 1,4,8,11-tetraazacyclotetradecane (TACTD ) have been investigated in CHCl3 solvent. The data indicate the forma tion of the CT-complexes with the general formula [(TACTD) (acceptor)( 2)]. The 1 : 2 stoichiometry of the (TACTD)-acceptor was based on elem ental analysis and infrared spectra of the solid CT-complexes along wi th the photometric titration curves for the reactions in CHCl3. The fo rmation constants (K) for the CT-complexes are shown to be strongly de pendent on the type and structure of the pi-acceptor.