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Molecular complexes of paraquat with anilines

  • P. Padma
  • T. Vinod Kumar
  • T. Charan Singh
  • G. Venkateshwarlu
Physical and Theoretical

Abstract

The U V-VIS spectra of molecular complexes of paraquat with ring and N-substituted anilines have been recorded in methanol and 50% v/v aqueous methanol. All the complexes exhibited well-resolved charge transfer bands in the wavelength region where neither of the components have any absorption. The energies of charge transfer bands of the substituted aniline-paraquat complexes bear linear relationships with the ionization potentials obtained from the substituted aniline-TCNE complexes, indicating π - π interaction between paraquat and the donors. Both ring and N-substituents have effects on the positions of the CT bands as well as on the stabilities of the complexes. The positions of the CT bands are shifted to shorter wavelengths and the stabilities of the complexes decrease on going from methanol to aqueous. methanol.

Keywords

Molecular complexes π -π interaction substituent effect stability constants thermodynamic parameters 

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References

  1. Benesi H A and Hildebrand J H 1949J. Am. Chem. Soc. 71 2703CrossRefGoogle Scholar
  2. Bertolotti S G, Cosa J J, Gsponer H E, Hamity M and Previtali C M 1986Can. J. Chem. 64 845CrossRefGoogle Scholar
  3. Bertolotti S G, Cosa J J, Gsponer H E, and Previtali C M 1987Can. J. Chem. 65 2425Google Scholar
  4. Carper W R, Hedges R M and Simpson H N 1965J. Phys. Chem. 69 1707CrossRefGoogle Scholar
  5. Chandra A K and Mukherjee D C 1964Trans. Faraday Soc. 60 62CrossRefGoogle Scholar
  6. Ebbesen I W and Ferrandi G 1983J. Phys. Chem. 87 3717CrossRefGoogle Scholar
  7. Fornasiero D and Grieser F 1990J. Chem. Soc, Faraday Trans. 86 2955CrossRefGoogle Scholar
  8. Foster R 1969Organic charge transfer complexes (London, New York: Academic Press) p. 207Google Scholar
  9. Foster R and Hammick D I, 1954J. Chem. Soc. 2685Google Scholar
  10. Hoffman M Z, Prasad D R, Jones G and Malba V 1983J. Am. Chem. Soc. 105 6360CrossRefGoogle Scholar
  11. Isaacs N S 1966J. Chem. Soc. (B) 1053Google Scholar
  12. Martens F M and Verhoeven J W 1981J. Phys. Chem. 85 1773CrossRefGoogle Scholar
  13. Poulos A T, Kelley C K and Simone R 1981J. Phys. Chem. 85 823CrossRefGoogle Scholar
  14. Ross S D, Bassin M and Kuntz I 1954J. Am. Chem. Soc. 76 4176CrossRefGoogle Scholar
  15. Tsubomura H 1960J. Am. Chem. Soc. 82 40CrossRefGoogle Scholar
  16. White B G 1969Trans. Faraday Soc. 65 2000CrossRefGoogle Scholar
  17. Yoon K B and Kochi J K 1991J. Phys. Chem. 95 3780CrossRefGoogle Scholar

Copyright information

© Indian Academy of Sciences 1995

Authors and Affiliations

  • P. Padma
    • 1
  • T. Vinod Kumar
    • 1
  • T. Charan Singh
    • 1
  • G. Venkateshwarlu
    • 1
  1. 1.Department of ChemistryNizam CollegeHyderabadIndia

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