Synthesis, spectroscopic and computational studies on charge-transfer complexes of 1,4-benzoquinone

Treatment of 1,4-benzoquinone as acceptor with aniline, 2-tolidine, 4-toluidine, 2-aminothiazol and 8- hydroxylquinoline as donors gave charge transfer complexes in good yields . The complexes were characterized by elemental analyses, IR and 1H-NMR spectroscopy. The data obtained indicate the formation of 1:1 charge transfer complexes, also a charge transfer interaction associated by intermolecular hydrogen bonding (n-π* electronic). The normal π-π* electronic interaction take place by transferring an electron from the donors ring to the acceptor ring. The equilibrium constants, the extinction coefficients calculated using equation such as modified Benesi- Hildebrand, The free energy, ionization potential and transition energy of the complexes were calculated.

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