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Abstract
Charge transfer molecular complexes of some pyrazole donors (pyrazole, 4-methylpyrazole, 3-methylpyrazole and 3,5-dimethylpyrazole) with 2,3-dichloro-5,6-dicyano-1,4- p-benzoquinone and tetracyanoethylene as π-electron acceptors have been studied in CH 2Cl 2 at 25 °C. Spectral characteristics and stability constants of the formed charge transfer (CT) complexes are discussed in terms of the nature of donor and acceptor molecular structure, as well as in relation to solvent polarity. Thermodynamic parameters (ΔH, ΔG and ΔS) associated with CT complex formation are also examined. It was concluded that the formed CT complexes are of n-π type with 1:1 (D:A) composition.
Published Version
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Schedule a callMore From: Spectrochimica Acta Part A: Molecular and Biomolecular Spectroscopy
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