Electronic, infrared, and (HNMR)-H-1 spectral studies of the novel charge-transfer complexes of o-tolidine and p-toluidine with alternation pi-acceptors (3,5-dinitro benzoic acid and 2,6-dichloroquinone-4-chloroimide) in CHCl3 solvent

The rapid interaction between o-tolidine and p-toluidine (pi-donors) with the p-acceptors, e.g., 3,5-dinitrobenzoic acid (DNB) and 2,6-dichloroquinone-4-chloroimide (DCQ) results in the formation of 1:1 charge-transfer complexes as the final products, {[}(o-tolidine) (acceptor)] and {[}(p-toluidine) (acceptor)]. The final products of the reactions have been isolated and characterized using FTIR, (HNMR)-H-1 spectroscopy and elemental analysis as well as photometric titration. The stoichiometry and apparent formation constants of the complexes formed were determined by applying the conventional spectrophotometric molar ratio method.(c) 2005 Elsevier B.V. All rights reserved.