Spectroscopic investigation of the donor-acceptor interaction between o-phenylenediamine and tetracyanoethylene in dichloromethane |
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Authors: | Aljaber Amina S Nour El-Metwally |
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Institution: | Department of Chemistry and Earth Science, College of Art and Sciences, Qatar University, P.O. Box 2713, Doha, Qatar. |
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Abstract: | The interaction between the electron donor o-phenylenediamine (o-phendn) and the pi-acceptor tetracyanoethylene (TCNE) has been investigated spectrophotometrically in dichloromethane at 25 degrees C. The results indicate that the reaction proceeds via two major steps. The formation of the 1:2 charge-transfer complex (o-phendn)(2), (TCNE)(4)] in which two o-phenylenediamine molecules undergoes slow N-substitution by one TCNE forming the final reaction product 2,2-di-o-aminoaniline-1,1-dicyanoethylene and 2HCN molecules. The reaction was studied using electronic, infrared, photometric titration and cyclic voltametric measurements. A general mechanism for the reactions is proposed. |
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Keywords: | Charge-transfer o-Phenylenediamine Tetracyanoethylene Spectra |
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