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EDA Complexes of 2,3-Dichloro-1,4-naphthoquinone with Some Substituted Anilines

Neelgund, Gururaj M and Kulkarni, Abhay S and Budni, ML (2004) EDA Complexes of 2,3-Dichloro-1,4-naphthoquinone with Some Substituted Anilines. In: Monatshefte für Chemie / Chemical Monthly, 135 (4). pp. 343-355.

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Electron donor-acceptor (EDA) complexes of several substituted anilines with the pi-acceptor 2,3-dichloro-1,4-naphthoquinone (DClNQ) in chloroform, dichloromethane, and 1,2-dichloroethane were studied by a spectrophotometric method. Experimental data has been shown to confirm the 1:2 stoichiometry of the acceptor-donor in spite of the apparent linearity of the Benesi-Hildebrand plot for a 1:1 complex. The calculated values of oscillator strengths, transition moments, and thermodynamic parameters confirms the 1:2 (A:D) stoichiometry of the complexes. The formation constants and molar absorptivities for these AD(2) complexes have been evaluated. The stoichiometry was unaffected by the variation of the temperature over a small interval and also by the change in polarity of the solvent. The order of the donor strength followed the sequence: N-benzylaniline > p-chloroaniline > m-chloroaniline > o-chloroaniline.

Item Type: Journal Article
Publication: Monatshefte für Chemie / Chemical Monthly
Publisher: Springer-Verlag
Additional Information: Copyright of this article belongs to Springer-Verlag.
Keywords: EDA complex;CT-Complexes;2,3-Dichloro-1,4-naphthoquinone (DClNQ);Spectrophotometric;Thermodynamic.
Department/Centre: Division of Chemical Sciences > Materials Research Centre
Date Deposited: 18 Dec 2008 12:12
Last Modified: 19 Sep 2010 04:54
URI: http://eprints.iisc.ac.in/id/eprint/16882

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