Electron donor–acceptor complexes of 2,3-dichloro-5-nitro-1,4-naphthoquinone with some methyl substituted anilines: formation of 1:2 (A:D) complexes

The donor–acceptor complexes between 2,3-dichloro-5-nitro-1,4-naphthoquinone (DClNNQ) and some methyl substituted anilines were investigated by spectrophotometric method. This investigation was carried out in three different chlorinated solvents viz., chloroform, dichloromethane and 1,2-dichloroetha...

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Bibliographic Details
Published in:Spectrochimica acta. Part A, Molecular and biomolecular spectroscopy Molecular and biomolecular spectroscopy, 2004-07, Vol.60 (8), p.1793-1803
Main Authors: Neelgund, Gururaj M, Budni, M.L
Format: Article
Language:English
Subjects:
1:2 (A:D) complexes
2,3-Dichloro-5-nitro-1,4-naphthoquinone (DClNNQ)
Aniline Compounds - chemistry
CT-complex
Electron Transport
Macromolecular Substances
Naphthoquinones - chemistry
Solvents
Spectrophotometric method
Spectrophotometry
Thermodynamic parameters
Thermodynamics
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Summary:The donor–acceptor complexes between 2,3-dichloro-5-nitro-1,4-naphthoquinone (DClNNQ) and some methyl substituted anilines were investigated by spectrophotometric method. This investigation was carried out in three different chlorinated solvents viz., chloroform, dichloromethane and 1,2-dichloroethane. Experimental evidences shows the formation of 1:2 (A:D) complexes but not 1:1 complexes. The calculated values of the oscillator strength and transition moment confirms this suggestion. The stoichiometry of the complexes was unaffected by the variation of temperature over a small interval and also change in solvent. The thermodynamic and spectroscopic parameters were evaluated in all the three solvents for the formation of CT-complexes. The influence of used solvents on the thermodynamic and spectroscopic parameters was investigated. The strength of the donors was also investigated.
ISSN:1386-1425
DOI:10.1016/j.saa.2003.09.017