title: 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.
abstract: 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.
authors.affiliation: P.G. Department of Studies in Chemistry, Karnatak University, Dharwad-580003, India. gneelgund@yahoo.com
authors.forename: Gururaj M
authors.initials: GM
authors.lastname: Neelgund
authors.forename: M L
authors.initials: ML
authors.lastname: Budni
mesh_terms: D000814:Aniline Compounds / Q000737:chemistry*; D004579:Electron Transport; D046911:Macromolecular Substances; D009285:Naphthoquinones / Q000737:chemistry*; D012997:Solvents; D013053:Spectrophotometry; D013816:Thermodynamics
chemical_list: D000814:Aniline Compounds; D046911:Macromolecular Substances; D009285:Naphthoquinones; D012997:Solvents